Internet DRAFT - draft-leymann-banana-signaling-attributes
draft-leymann-banana-signaling-attributes
BANANA N. Leymann
Internet Draft C. Heidemann
Category: Proposed Standard Deutsche Telekom AG
L. Chen
M. Zhang
B. Sarikaya
Huawei
M. Cullen
Painless Security
Expires: June 24, 2018 December 21, 2017
BANdwidth Aggregation for interNet Access (BANANA)
Attributes for the Control Protocol of Bonding Tunnels
draft-leymann-banana-signaling-attributes-01.txt
Abstract
This memo specifies the attributes for the control protocol of
BANdwidth Aggregation for interNet Access (BANANA).
Status of this Memo
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Copyright and License Notice
Copyright (c) 2017 IETF Trust and the persons identified as the
document authors. All rights reserved.
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This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Acronyms and Terminology . . . . . . . . . . . . . . . . . . . 3
3. GRE Tunnel Setup Request . . . . . . . . . . . . . . . . . . . 4
3.1. Client Identification Name . . . . . . . . . . . . . . . . 4
3.2. Session ID . . . . . . . . . . . . . . . . . . . . . . . . 4
3.3. Synchronization Rate . . . . . . . . . . . . . . . . . . . 5
4. GRE Tunnel Setup Accept . . . . . . . . . . . . . . . . . . . . 6
4.1. R IPv4 Address . . . . . . . . . . . . . . . . . . . . . . 6
4.2. R IPv6 Address . . . . . . . . . . . . . . . . . . . . . . 6
4.3. Session ID . . . . . . . . . . . . . . . . . . . . . . . . 7
4.4. RTT Difference Threshold . . . . . . . . . . . . . . . . . 7
4.5. Bypass Bandwidth Check Interval . . . . . . . . . . . . . . 8
4.6. Active Hello Interval . . . . . . . . . . . . . . . . . . . 8
4.7. Hello Retry Times . . . . . . . . . . . . . . . . . . . . . 9
4.8. Idle Timeout . . . . . . . . . . . . . . . . . . . . . . . 10
4.9. Bonding Key Value . . . . . . . . . . . . . . . . . . . . . 10
4.10. Configured Link Upstream Bandwidth . . . . . . . . . . . . 11
4.11. Configured Link Downstream Bandwidth . . . . . . . . . . . 11
4.12. RTT Difference Threshold Violation . . . . . . . . . . . . 12
4.13. RTT Difference Threshold Compliance . . . . . . . . . . . 13
4.14. Idle Hello Interval . . . . . . . . . . . . . . . . . . . 13
4.15. No Traffic Monitored Interval . . . . . . . . . . . . . . 14
5. GRE Tunnel Setup Deny . . . . . . . . . . . . . . . . . . . . . 14
5.1. Error Code . . . . . . . . . . . . . . . . . . . . . . . . 15
6. GRE Tunnel Hello . . . . . . . . . . . . . . . . . . . . . . . 16
6.1. Timestamp . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2. IPv6 Prefix Assigned by the Remote . . . . . . . . . . . . 17
7. GRE Tunnel Tear Down . . . . . . . . . . . . . . . . . . . . . 17
8. GRE Tunnel Notify . . . . . . . . . . . . . . . . . . . . . . . 17
8.1. Bypass Traffic Rate . . . . . . . . . . . . . . . . . . . . 18
8.2. Filter List Package . . . . . . . . . . . . . . . . . . . . 18
8.3. Switching To Tunnel One . . . . . . . . . . . . . . . . . . 22
8.4. Overflowing To Tunnel Two . . . . . . . . . . . . . . . . . 22
8.5. Link One Failure . . . . . . . . . . . . . . . . . . . . . 23
8.6. Link Two Failure . . . . . . . . . . . . . . . . . . . . . 23
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8.7. IPv6 Prefix Assigned to Host . . . . . . . . . . . . . . . 23
8.8. Diagnostic Start: Bonding Tunnel . . . . . . . . . . . . . 24
8.9. Diagnostic Start: Tunnel One . . . . . . . . . . . . . . . 24
8.10. Diagnostic Start: Tunnel Two . . . . . . . . . . . . . . . 25
8.11. Diagnostic End . . . . . . . . . . . . . . . . . . . . . . 25
8.12. Filter List Package ACK . . . . . . . . . . . . . . . . . 26
8.13. Switching To Active Hello State . . . . . . . . . . . . . 26
8.14. Switching To Idle Hello State . . . . . . . . . . . . . . 27
8.15. Tunnel Verification . . . . . . . . . . . . . . . . . . . 28
9. Security Considerations . . . . . . . . . . . . . . . . . . . . 29
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 29
11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11.1. Normative References . . . . . . . . . . . . . . . . . . . 29
11.2. Informative References . . . . . . . . . . . . . . . . . . 30
Contributors . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 30
1. Introduction
The control plane of BANANA delivers configuration and control
information between two peering BANANA boxes. Control messages such
as GRE Tunnel Setup Request, GRE Tunnel Setup Accept, GRE Tunnel
Setup Deny, GRE Tunnel Hello, GRE Tunnel Tear Down and GRE Tunnel
Notify are specified in [BANANA-signaling]. This document further
specifies the attributes to be carried as Attribute field in those
control messages exchanged between the two peering BANANA boxes.
2. Acronyms and Terminology
GRE: Generic Routing Encapsulation [RFC2784] [RFC2890].
CIR: Committed Information Rate [RFC2697].
RTT: Round-Trip Time.
FQDN: Fully Qualified Domain Name. Generally, a host name with at
least one domain label under the top-level domain. For example,
"dhcp.example.org" is an FQDN [RFC7031].
DSCP: The 6-bit codepoint (DSCP) of the Differentiated Services field
(DS field) in the IPv4 and IPv6 headers [RFC2724].
DNS: Domain Name System. A hierarchical distributed naming system
for computers, services, or any resource connected to the Internet
or a private network.
DHCP: Dynamic Host Configuration Protocol. A standardized network
protocol used on Internet Protocol (IP) networks for dynamically
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distributing network configuration parameters, such as IP
addresses for interfaces and services.
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
3. GRE Tunnel Setup Request
The local BANANA box uses the GRE Tunnel Setup Request message to
request that the remote BANANA box establishes the GRE tunnels. It
is sent out from the local BANANA box's "F" and "S" interfaces (see
Figure 3.1 of [BANANA-signaling]). Attributes that need to be
included in this message are defined in the following subsections.
3.1. Client Identification Name
An operator uses the Client Identification Name (CIN) to identify the
local BANANA box. The local BANANA box sends the CIN to the remote
BANANA box for authentication and authorization as specified in
[TS23.401]. It is REQUIRED that the GRE Tunnel Setup Request message
sent out from the "S" interface contain the CIN attribute while the
GRE Tunnel Setup Request message sent out from the "F" interface does
not contain this attribute.
The CIN attribute has the following format:
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Client Identification Name (40 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
CIN, set to 3.
Attribute Length
Set to 40.
Client Identification Name
This is a 40-byte string value encoded in UTF-8 and set by the
operator. It is used as the identification of the local BANANA
box in the operator's network.
3.2. Session ID
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This Session ID is generated by the remote BANANA box when the first
GRE Tunnel Setup Request message is received. The remote BANANA box
announces the Session ID to the local BANANA box in the GRE Tunnel
Setup Accept message. For the "F" and "S" interfaces that need to be
bonded together, the local BANANA box MUST use the same Session ID.
The local BANANA box MUST carry the Session ID attribute in each GRE
Tunnel Setup Request message except the first time that the GRE
Tunnel Setup Request message is sent to the remote BANANA box.
The Session ID attribute has the following format:
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Session ID (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Session ID, set to 4.
Attribute Length
Set to 4.
Session ID
An unsigned integer generated by the remote BANANA box. It is
used as the identification of bonded GRE tunnels.
3.3. Synchronization Rate
If a GRE tunnel is using the Digital Subscriber Line (DSL), the local
BANANA box uses the Synchronization Rate to notify the remote BANANA
box about the downstream bandwidth of the DSL link. The GRE Tunnel
Setup Request message sent on a GRE tunnel on a DSL link MUST include
the Synchronization Rate attribute. GRE Tunnel Setup Request message
sent on a GRE tunnel on other kinds of link SHOULD NOT include this
attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Synchronization Rate (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
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Synchronization Rate, set to 7.
Attribute Length
Set to 4.
Synchronization Rate
An unsigned integer measured in kbps.
4. GRE Tunnel Setup Accept
The remote BANANA box uses the GRE Tunnel Setup Accept message as the
response to the GRE Tunnel Setup Request message. This message
indicates acceptance of the tunnel establishment and carries
parameters of the GRE tunnels. Attributes that need to be included
in this message are defined below.
4.1. R IPv4 Address
The remote BANANA box uses the "R" (see Figure 3.1 of [BANANA-
signaling]) IPv4 Address attribute to inform the local BANANA box of
the "R" IPv4 address. The local BANANA box uses the "R" IPv4 address
as the destination endpoint IPv4 address of the GRE tunnels (the
source endpoint IPv4 addresses of the GRE tunnels are the "F"
interface IP address and the "S" interface IP address). The GRE
Tunnel Setup Accept message sent over Tunnel 2 MUST include the R
IPv4 Address attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| R IPv4 Address (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
R IPv4 Address, set to 1.
Attribute Length
Set to 4.
R IPv4 Address
Set to the pre-configured IPv4 address (e.g., an IP address of a
Line Card in the remote BANANA box), which is used as the
endpoint IP address of GRE tunnels by the remote BANANA box.
4.2. R IPv6 Address
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The remote BANANA box uses the "R" (see Figure 3.1 of [BANANA-
signaling]) IPv6 Address attribute to inform the local BANANA box of
the "R" IPv6 address. The local BANANA box uses the "R" IPv6 address
as the destination endpoint IPv6 address of the GRE tunnels (the
source endpoint IPv6 addresses of the GRE tunnels are the "F"
interface IP address and the "S" interface IP address). The GRE
Tunnel Setup Accept message sent over Tunnel 2 MUST include the R
IPv6 Address attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| R IPv6 Address (16 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
R IPv6 Address, set to 2.
Attribute Length
Set to 16.
R IPv6 Address
Set to the pre-configured IPv6 address (e.g., an IP address of a
Line Card in the remote BANANA box), which is used as the
endpoint IP address of GRE tunnels by the remote BANANA box.
4.3. Session ID
The GRE Tunnel Setup Accept message sent over Tunnel 2 MUST include
the Session ID attribute as defined in Section 3.2.
4.4. RTT Difference Threshold
The remote BANANA box uses the RTT Difference Threshold attribute to
inform the local BANANA box of the acceptable threshold of the RTT
difference between Tunnel 1 and Tunnel 2. If the measured RTT
difference exceeds this threshold, the local BANANA box SHOULD stop
offloading traffic to Tunnel 2. The GRE Tunnel Setup Accept message
sent over Tunnel 2 MUST include the RTT Difference Threshold
attribute.
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+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| RTT Difference Threshold (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
RTT Difference Threshold, set to 9.
Attribute Length
Set to 4.
RTT Difference Threshold
An unsigned integer measured in milliseconds. This value can be
chosen in the range 0 through 1000.
4.5. Bypass Bandwidth Check Interval
The remote BANANA box uses the Bypass Bandwidth Check Interval
attribute to inform the local BANANA box of how frequently the bypass
bandwidth should be checked. The local BANANA box should check the
bypass bandwidth of the "F" interface in each time period indicated
by this interval. The GRE Tunnel Setup Accept message sent over
Tunnel 2 MUST include the Bypass Bandwidth Check Interval attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Bypass Bandwidth Check Interval (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Bypass Bandwidth Check Interval, set to 10.
Attribute Length
Set to 4.
Bypass Bandwidth Check Interval
An unsigned integer measured in seconds. This value can be chosen
in the range 10 through 300.
4.6. Active Hello Interval
The remote BANANA box uses the Active Hello Interval attribute to
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inform the local BANANA box of the pre-configured interval for
sending out GRE Tunnel Hellos. The local BANANA box should send out
GRE Tunnel Hellos via both "F" and "S" interfaces in each time period
as indicated by this interval. The GRE Tunnel Setup Accept message
sent over Tunnel 2 MUST include the Active Hello Interval attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Active Hello Interval (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Active Hello Interval, set to 14.
Attribute Length
Set to 4.
Active Hello Interval
An unsigned integer measured in seconds. This value can be chosen
in the range 1 through 100.
4.7. Hello Retry Times
The remote BANANA box uses the Hello Retry Times attribute to inform
the local BANANA box of the retry times for sending GRE Tunnel
Hellos. If the local BANANA box does not receive any acknowledgement
from the remote BANANA box for the number of GRE Tunnel Hello
attempts specified in this attribute, the local BANANA box will
declare a failure of the GRE tunnel. The GRE Tunnel Setup Accept
message sent over Tunnel 2 MUST include the Hello Retry Times
attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Hello Retry Times (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Hello Retry Times, set to 15.
Attribute Length
Set to 4.
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Hello Retry Times
An unsigned integer that takes values in the range 3 through 10.
4.8. Idle Timeout
The remote BANANA box uses the Idle Timeout attribute to inform the
local BANANA box of the pre-configured timeout value to terminate
Tunnel 1. When Tunnel 2 failure is detected, all traffic will be
sent over Tunnel 1. If the failure of Tunnel 2 lasts longer than the
Idle Timeout, subsequent traffic will be sent over the raw link 1
rather than over Tunnel 1, and Tunnel 1 SHOULD be terminated. The
GRE Tunnel Setup Accept message sent over Tunnel 2 MUST include the
Idle Timeout attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Idle Timeout (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Idle Timeout, set to 16.
Attribute Length
Set to 4.
Idle Timeout
An unsigned integer measured in seconds. It takes values in the
range 0 through 172,800 with a granularity of 60. The default
value is 86,400 (24 hours). The value 0 indicates that the idle
timer never expires.
4.9. Bonding Key Value
The remote BANANA box uses the Bonding Key Value attribute to inform
the local BANANA box of the number that is to be carried as the Key
of the GRE header for subsequent control messages. The Bonding Key
Value is generated by the remote BANANA box and used for security
purposes.
The method used to generate this number is left up to
implementations. The pseudorandom number generator defined in ANSI
X9.31, Appendix A.2.4 [ANSI-X9.31-1998] is RECOMMENDED. Note that
random number generation "collisions" are allowed in the GRE Tunnel
Bonding Protocol.
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+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Bonding Key Value (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Bonding Key Value, set to 20.
Attribute Length
Set to 4.
Bonding Key Value
A 32-bit random number generated by the remote BANANA box.
4.10. Configured Link Upstream Bandwidth
The remote BANANA box obtains the upstream bandwidth of a link from
the management system and uses the Configured Link Upstream Bandwidth
attribute to inform the local BANANA box. The local BANANA box uses
the received upstream bandwidth as the CIR [RFC2697] for the link.
GRE Tunnel Setup Accept messages sent on either Tunnel 1 or Tunnel 2
MAY include the Configured Link Upstream Bandwidth attribute. If a
GRE tunnel is using the DSL, the GRE Tunnel Setup Accept message sent
on this link MUST include the Configured Link Upstream Bandwidth
attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Configured Link Upstream Bandwidth (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Configured Link Upstream Bandwidth, set to 22.
Attribute Length
Set to 4.
Configured Link Upstream Bandwidth
An unsigned integer measured in kbps.
4.11. Configured Link Downstream Bandwidth
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The remote BANANA box obtains the downstream bandwidth of a link from
the management system and uses the Configured Link Downstream
Bandwidth attribute to inform the local BANANA box. The local BANANA
box uses the received downstream bandwidth as the base in calculating
the bypassing bandwidth. GRE Tunnel Setup Accept messages sent on
either Tunnel 1 or Tunnel 2 MAY include the Configured Link
Downstream Bandwidth attribute. If a GRE tunnel is using the DSL,
the GRE Tunnel Setup Accept message sent on this link MUST include
the Configured DSL Downstream Bandwidth attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
|Configured Link Downstream Bandwidth(4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Configured Link Downstream Bandwidth, set to 23.
Attribute Length
Set to 4.
Configured Link Downstream Bandwidth
An unsigned integer measured in kbps.
4.12. RTT Difference Threshold Violation
The remote BANANA box uses the RTT Difference Threshold Violation
attribute to inform the local BANANA box of the number of times in a
row that the RTT Difference Threshold (see Section 4.4) may be
violated before the local BANANA box MUST stop using Tunnel 2. If
the RTT Difference Threshold is continuously violated for more than
the indicated number of measurements, the local BANANA box MUST stop
using Tunnel 2. The GRE Tunnel Setup Accept message sent over Tunnel
2 MUST include the RTT Difference Threshold Violation attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| RTT Diff Threshold Violation (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
RTT Difference Threshold Violation, set to 24.
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Attribute Length
Set to 4.
RTT Difference Threshold Violation
An unsigned integer that takes values in the range 1 through 25.
A typical value is 3.
4.13. RTT Difference Threshold Compliance
The remote BANANA box uses the RTT Difference Threshold Compliance
attribute to inform the local BANANA box of the number of times in a
row that the RTT Difference Threshold (see Section 4.4) must be
compliant before use of Tunnel 2 can be resumed. If the RTT
Difference Threshold is continuously detected to be compliant across
more than this number of measurements, the local BANANA box MAY
resume using Tunnel 2. The GRE Tunnel Setup Accept message sent over
Tunnel 2 MUST include the RTT Difference Threshold Compliance
attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| RTT Diff Threshold Compliance (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
RTT Difference Threshold Compliance, set to 25.
Attribute Length
Set to 4.
RTT Difference Threshold Compliance
An unsigned integer that takes values in the range 1 through 25.
A typical value is 3.
4.14. Idle Hello Interval
The remote BANANA box uses the Idle Hello Interval attribute to
inform the local BANANA box of the pre-configured interval for
sending out GRE Tunnel Hellos when the subscriber is detected to be
idle. The local BANANA box SHOULD begin to send out GRE Tunnel
Hellos via both "F" and "S" interfaces in each time period as
indicated by this interval, if the bonded tunnels have seen no
traffic for a period longer than the "No Traffic Monitored Interval"
(see Section 4.15). The GRE Tunnel Setup Accept message sent over
Tunnel 2 MUST include the Idle Hello Interval attribute.
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+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Idle Hello Interval (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Idle Hello Interval, set to 31.
Attribute Length
Set to 4.
Idle Hello Interval
An unsigned integer measured in seconds. This value can be chosen
in the range 100 through 86,400 (24 hours) with a granularity of
100. The default value is 1800 (30 minutes).
4.15. No Traffic Monitored Interval
The remote BANANA box uses the No Traffic Monitored Interval
attribute to inform the local BANANA box of the pre-configured
interval for switching the GRE Tunnel Hello mode. If traffic is
detected on the bonded GRE tunnels before this interval expires, the
local BANANA box SHOULD switch to the Active Hello Interval. The GRE
Tunnel Setup Accept message sent over Tunnel 2 MUST include the No
Traffic Monitored Interval attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| No Traffic Monitored Interval (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
No Traffic Monitored Interval, set to 32.
Attribute Length
Set to 4.
No Traffic Monitored Interval
An unsigned integer measured in seconds. This value is in the
range 30 through 86,400 (24 hours). The default value is 60.
5. GRE Tunnel Setup Deny
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The remote BANANA box MUST send the GRE Tunnel Setup Deny message to
the local BANANA box if the GRE Tunnel Setup Request from this local
BANANA box is denied. The local BANANA box MUST terminate the GRE
tunnel setup process as soon as it receives the GRE Tunnel Setup Deny
message.
5.1. Error Code
The remote BANANA box uses the Error Code attribute to inform the
local BANANA box of the error code. The error code depicts why the
GRE Tunnel Setup Request is denied. GRE Tunnel Setup Deny messages
sent over both Tunnel 1 and Tunnel 2 MUST include the Error Code
attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Error Code (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Error Code, set to 17.
Attribute Length
Set to 4.
Error Code
An unsigned integer. The list of codes is as follows:
1: The remote BANANA box was not reachable via link 2 during the
GRE Tunnel Setup Request.
2: The remote BANANA box was not reachable via link 1 during the
GRE Tunnel Setup Request.
3: The Tunnel 2 to the remote BANANA box failed.
4: The Tunnel 1 to the remote BANANA box failed.
5: The given User ID of link 1 is not allowed to use the GRE
Tunnel Bonding service.
6: The given User Alias / User ID (Globally Unique Identifier
(GUID)) is not allowed to use the GRE Tunnel Bonding service.
7: The User IDs of link 1 and link 2 do not match.
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8: The remote BANANA box denied the GRE Tunnel Setup Request
because a bonding session with the same User ID already
exists.
9: The remote BANANA box denied the GRE Tunnel Setup Request
because the user's CIN is not permitted.
10: The remote BANANA box terminated a GRE Tunnel Bonding session
for maintenance reasons.
11: There was a communication error between the remote BANANA box
and the management system when the GRE Tunnel Setup Request
message is being sent over Tunnel 2.
12: There was a communication error between the remote BANANA box
and the management system when the GRE Tunnel Setup Request
message is being sent over Tunnel 1.
6. GRE Tunnel Hello
After the Tunnel 1 / Tunnel 2 is established, the local BANANA box
begins to periodically send out GRE Tunnel Hello messages via the
tunnel; the remote BANANA box acknowledges the local BANANA box's
messages by returning GRE Tunnel Hello messages to the local BANANA
box. This continues until the tunnel is terminated.
6.1. Timestamp
The remote BANANA box uses the Timestamp attribute to inform the
local BANANA box of the timestamp value that is used for RTT
calculation. GRE Tunnel Hello messages sent over both Tunnel 1 and
Tunnel 2 MUST include the Timestamp attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Timestamp (8 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Timestamp, set to 5.
Attribute Length
Set to 8.
Timestamp
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The time since the system restarted. The high-order 4 bytes
indicate an unsigned integer in units of 1 second; the low-order
4 bytes indicate an unsigned integer in units of 1 millisecond.
6.2. IPv6 Prefix Assigned by the Remote
The remote BANANA box uses the IPv6 Prefix Assigned by the Remote
attribute to inform the local BANANA box of the assigned IPv6 prefix.
This IPv6 prefix is to be captured via lawful intercept. GRE Tunnel
Hello messages sent over both Tunnel 1 and Tunnel 2 MUST include the
IPv6 Prefix Assigned by the Remote attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| IPv6 Prefix Assigned by the Remote(16 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
IPv6 Prefix Assigned by the Remote, set to 13.
Attribute Length
Set to 17.
IPv6 Prefix Assigned by the Remote
The highest-order 16 bytes encode an IPv6 address. The
lowest-order 1 byte encodes the prefix length. These two values
are put together to represent an IPv6 prefix.
7. GRE Tunnel Tear Down
The remote BANANA box can terminate Tunnel 1 / Tunnel 2 by sending
the GRE Tunnel Tear Down message to the local BANANA box via the
tunnel. The Error Code attribute as defined in Section 5.1 MUST be
included in this message. After receiving the GRE Tunnel Tear Down
message, the local BANANA box removes the IP address of R, which is
the destination IP addresses of Tunnel 1 and Tunnel 2.
8. GRE Tunnel Notify
The local BANANA box and the remote BANANA box use the GRE Tunnel
Notify message, which is transmitted through either Tunnel 1 or
Tunnel 2, to notify each other about their status regarding the two
GRE tunnels, the information for the bonded tunnels, the actions that
need to be taken, etc.
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Usually, the receiver just sends the received attributes back as the
acknowledgement for each GRE Tunnel Notify message. However, there
is an exception for the Filter List Package: since the size of the
Filter List Package attribute can be very large, a special attribute
-- the Filter List Package ACK attribute -- is used as the
acknowledgement (see Section 8.12).
Attributes that need to be included in the GRE Tunnel Notify message
are defined below.
8.1. Bypass Traffic Rate
There are a few types of traffic that need to be transmitted over the
raw "F" interface (see Figure 3.1 of [BANANA-signaling]) rather than
the bonded GRE tunnels. The local BANANA box has to set aside bypass
bandwidth on the "F" interface for these traffic types. Therefore,
the available bandwidth of Tunnel 1 is the entire "F" interface
bandwidth minus the occupied bypass bandwidth.
The local BANANA box uses the Bypass Traffic Rate attribute to inform
the remote BANANA box of the downstream bypass bandwidth for the "F"
interface. The Bypass Traffic Rate attribute will be included in the
GRE Tunnel Notify message sent over Tunnel 1. The remote BANANA box
calculates the available downstream bandwidth for Tunnel 1 as the
Configured Link Downstream Bandwidth minus the bypass bandwidth
provided by the local BANANA box. The available downstream bandwidth
will be used as the CIR of the coloring system [RFC2697].
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Bypass Traffic Rate (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Bypass Traffic Rate, set to 6.
Attribute Length
Set to 4.
Bypass Traffic Rate
An unsigned integer measured in kbps.
8.2. Filter List Package
The remote BANANA box uses the Filter List Package attribute to
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inform the local BANANA box of the service types that need to bypass
the bonded GRE tunnels. The full list of all Filter Items may be
given by a series of Filter List Package attributes with each
specifying a partial list. At the local BANANA box, a full list of
Filter Items is maintained. Also, the local BANANA box needs to
maintain an exception list of Filter Items. For example, the packets
carrying the control messages defined in this document should be
excluded from the filter list.
Incoming packets that match a Filter Item in the filter list while
not matching any item in the exception list MUST be transmitted over
the raw link 1 rather than the bonded GRE tunnels. GRE Tunnel Notify
messages sent over both Tunnel 1 and Tunnel 2 MAY include the Filter
List Package attribute. When one of the link is DSL, the DSL GRE
Tunnel Notify message is preferred.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Filter List TLV (variable) ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Filter List Package, set to 8.
Attribute Length
The total length of the Filter List TLV. The maximum allowed
length is 969 bytes.
Filter List TLV
The Filter List TLV occurs one time in a Filter List Package
attribute. It has the following format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Commit_Count |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Packet_Sum | Packet_ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Filter Item (1) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ...... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Filter Item (n) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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where each Filter Item is of the following format:
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Enable | Description Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
~ Description Value ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
~ Value ~
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Commit_Count
An unsigned integer that identifies the version of the Filter
Item list. The version is shared by all Filter List Packages
and increases monotonically by one for each new Filter Item
list. The local BANANA box MUST refresh its Filter Item list
when a new Commit_Count is received.
Packet_Sum
If a single Filter List Package attribute might make the
control message larger than the MTU, fragmentation is used.
The Packet_Sum indicates the total number of fragments.
Packet_ID
The fragmentation index for this Filter List Package attribute.
Each fragment is numbered starting at 1 and increasing by one
up to Packet_Sum.
Type
The Type of the Filter Item. Currently, the following types
are supported:
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Filter Item Type
=========================== ============
FQDN [RFC7031] 1
DSCP [RFC2724] 2
Destination Port 3
Destination IP 4
Destination IP & Port 5
Source Port 6
Source IP 7
Source IP & Port 8
Source MAC 9
Protocol 10
Source IP Range 11
Destination IP Range 12
Source IP Range & Port 13
Destination IP Range & Port 14
Other values are reserved for future use and MUST be ignored on
receipt.
Length
The length of the Filter Item in bytes. Type and Length are
excluded.
Enable
An integer that indicates whether or not the Filter Item is
enabled. A value of 1 means "enabled", and a value of 0 means
"disabled". Other possible values are reserved and MUST be
ignored on receipt.
Description Length
The length of the Description Value in bytes.
Description Value
A variable-length string value encoded in UTF-8 that describes
the Filter List TLV (e.g., "FQDN").
Value
A variable-length string encoded in UTF-8 that specifies the
value of the Filter Item (e.g., "www.yahoo.com"). As an
example, Type = 1 and Value = "www.yahoo.com" mean that packets
whose FQDN field equals "www.yahoo.com" match the Filter Item.
"Source MAC" (source Media Access Control address) values are
specified using hexadecimal numbers. Port numbers are decimals
as assigned by IANA in [Port-NO]. For the "Protocol" type, the
value could be either a decimal or a keyword specified by IANA
in [Pro-NO]. The formats for IP addresses and IP address
ranges are defined in [RFC4632] and [RFC4291] for IPv4 and
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IPv6, respectively. A Filter Item of Type 5, 8, 13, or 14 is a
combination of two parameters; values for the two parameters
are separated by a colon (":").
8.3. Switching To Tunnel One
If the RTT difference between Tunnel 1 and Tunnel 2 is continuously
detected to be in violation of the RTT Difference Threshold (see
Section 4.4) more than the number of times specified in the RTT
Difference Threshold Violation attribute (see Section 4.12), the
local BANANA box uses the Switching To Tunnel One attribute to inform
the remote BANANA box to use Tunnel 1 only. When the remote BANANA
box receives this attribute, it MUST begin to transmit downstream
traffic to this local BANANA box solely over Tunnel 1. The GRE
Tunnel Notify message sent over Tunnel 1 MAY include the Switching To
Tunnel One attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Attribute Type
Switching To Tunnel One, set to 11.
Attribute Length
Set to 0.
8.4. Overflowing To Tunnel Two
If the RTT difference between Tunnel 1 and Tunnel 2 is continuously
detected to not be in violation of the RTT Difference Threshold (see
Section 4.4) more than the number of times specified in the RTT
Difference Threshold Compliance attribute (see Section 4.13), the
local BANANA box uses the Overflowing To Tunnel Two attribute to
inform the remote BANANA box that Tunnel 2 can be used again. The
GRE Tunnel Notify message sent over Tunnel 1 MAY include the
Overflowing To Tunnel Two attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Attribute Type
Overflowing To Tunnel Two, set to 12.
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Attribute Length
Set to 0.
8.5. Link One Failure
When the local BANANA box detects that the "F" interface status is
"down", it MUST tear down Tunnel 1. It informs the remote BANANA box
about the failure by using the Link One Failure attribute. The
remote BANANA box MUST tear down Tunnel 1 upon receipt of the Link
One Failure attribute. The Link One Failure attribute SHOULD be
carried in the GRE Tunnel Notify message sent over Tunnel 2.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Attribute Type
Link One Failure, set to 18.
Attribute Length
Set to 0.
8.6. Link Two Failure
When the local BANANA box detects that the "S" interface status is
"down", it MUST tear down Tunnel 2. It informs the remote BANANA box
about the failure by using the Link Two Failure attribute. The
remote BANANA box MUST tear down Tunnel 2 upon receipt of the Link
Two Failure attribute. The Link Two Failure attribute SHOULD be
carried in the GRE Tunnel Notify message sent over Tunnel 1.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Attribute Type
Link Two Failure, set to 19.
Attribute Length
Set to 0.
8.7. IPv6 Prefix Assigned to Host
If the local BANANA box changes the IPv6 prefix assigned to the host,
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it uses the IPv6 Prefix Assigned to Host attribute to inform the
remote BANANA box. GRE Tunnel Notify messages sent over both Tunnel
1 and Tunnel 2 MAY include the IPv6 Prefix Assigned to Host
attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| IPv6 Prefix Assigned to Host (16 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
IPv6 Prefix Assigned to Host, set to 21.
Attribute Length
Set to 17.
IPv6 Prefix Assigned to Host
The highest-order 16 bytes encode an IPv6 address. The
lowest-order 1 byte encodes the prefix length. These two values
are put together to represent an IPv6 prefix.
8.8. Diagnostic Start: Bonding Tunnel
The local BANANA box uses the Diagnostic Start: Bonding Tunnel
attribute to inform the remote BANANA box to switch to diagnostic
mode to test the performance of the entire bonding tunnel. The
Diagnostic Start: Bonding Tunnel attribute SHOULD be carried in the
GRE Tunnel Notify message sent over Tunnel 1.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Attribute Type
Diagnostic Start: Bonding Tunnel, set to 26.
Attribute Length
Set to 0.
8.9. Diagnostic Start: Tunnel One
The local BANANA box uses the Diagnostic Start: Tunnel One attribute
to inform the remote BANANA box to switch to diagnostic mode to test
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the performance of Tunnel 1. The Diagnostic Start: Tunnel One
attribute SHOULD be carried in the GRE Tunnel Notify message sent
over Tunnel 1.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Attribute Type
Diagnostic Start: Tunnel One, set to 27.
Attribute Length
Set to 0.
8.10. Diagnostic Start: Tunnel Two
The local BANANA box uses the Diagnostic Start: Tunnel Two attribute
to inform the remote BANANA box to switch to diagnostic mode to test
the performance of Tunnel 2. The Diagnostic Start: Tunnel Two
attribute SHOULD be carried in the GRE Tunnel Notify message sent
over Tunnel 1.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Attribute Type
Diagnostic Start: Tunnel Two, set to 28.
Attribute Length
Set to 0.
8.11. Diagnostic End
The local BANANA box uses the Diagnostic End attribute to inform the
remote BANANA box to stop operating in diagnostic mode. The
Diagnostic End attribute SHOULD be carried in the GRE Tunnel Notify
message sent over Tunnel 1.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Attribute Type
Diagnostic End, set to 29.
Attribute Length
Set to 0.
8.12. Filter List Package ACK
The local BANANA box uses the Filter List Package ACK attribute to
acknowledge the Filter List Package sent by the remote BANANA box.
GRE Tunnel Notify messages sent over both Tunnel 1 and Tunnel 2 MAY
include the Filter List Package ACK attribute.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+
| Filter List Package ACK (5 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+...+-+
Attribute Type
Filter List Package ACK, set to 30.
Attribute Length
Set to 5.
Filter List Package ACK
The highest-order 4 bytes are the Commit_Count as defined in
Section 8.2. The lowest-order 1 byte encodes the following
error codes:
0: The Filter List Package is acknowledged.
1: The Filter List Package is not acknowledged. The local BANANA
box is a new subscriber and has not ever received a Filter List
Package. In this case, the remote BANANA box SHOULD tear down
the bonding tunnels and force the local BANANA box to re-
establish the GRE tunnels.
2: The Filter List Package is not acknowledged. The local BANANA
box has already gotten a valid Filter List Package. The filter
list on the local BANANA box will continue to be used, while
the remote BANANA box need not do anything.
8.13. Switching To Active Hello State
If traffic is being sent/received over the bonding GRE tunnels before
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the "No Traffic Monitored Interval" expires (see Section 4.15), the
local BANANA box sends the remote BANANA box a GRE Tunnel Notify
message containing the Switching To Active Hello State attribute.
The remote BANANA box will switch to Active Hello State and send the
local BANANA box a GRE Tunnel Notify message carrying the Switching
To Active Hello State attribute as the ACK.
When the local BANANA box receives the ACK, it will switch to Active
Hello State, start RTT detection, and start sending GRE Tunnel Hello
messages with the Active Hello Interval (see Section 4.6).
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Attribute Type
Switching To Active Hello State, set to 33.
Attribute Length
Set to 0.
8.14. Switching To Idle Hello State
The local BANANA box initiates switching To Idle Hello State when the
bonding of GRE tunnels is successfully established and the GRE Tunnel
Setup Accept message sent over Tunnel 2 carrying the Idle Hello
Interval attribute (see Section 4.14) is received. The local BANANA
box sends the remote BANANA box a GRE Tunnel Notify message
containing the Switching To Idle Hello State attribute.
The remote BANANA box will switch to Idle Hello State, clear RTT
state, and send the local BANANA box a GRE Tunnel Notify message
carrying the Switching to Idle Hello State attribute as the ACK.
When the local BANANA box receives the ACK, it will (1) switch to
Idle Hello State, (2) stop RTT detection and clear RTT state, and (3)
start sending GRE Tunnel Hello messages with the Idle Hello Interval
(see Section 4.14).
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Attribute Type
Switching To Idle Hello State, set to 34.
Attribute Length
Set to 0.
8.15. Tunnel Verification
The remote BANANA box uses the Tunnel Verification attribute to
inform the local BANANA box to verify whether an existing Tunnel 2 is
still functioning. The Tunnel Verification attribute SHOULD be
carried in the GRE Tunnel Notify message sent over Tunnel 2. It
provides a means to detect the tunnel faster than the GRE Tunnel
Hello, especially when Tunnel 2 is in the Idle Hello State and it
takes a much longer time to detect this tunnel.
When the remote BANANA box receives a GRE Tunnel Setup Request sent
over Tunnel 2 and finds that the requested tunnel conflicts with an
existing tunnel, the remote BANANA box initiates tunnel verification.
The remote BANANA box drops all conflicting GRE Tunnel Setup Request
messages sent over Tunnel 2 and sends GRE Tunnel Notify messages
carrying the Tunnel Verification attribute until the verification
ends. The local BANANA box MUST respond to the remote BANANA box
with the same Tunnel Verification attribute as the ACK if the tunnel
is still functioning.
If the ACK of the Tunnel Verification attribute is received from the
local BANANA box, the remote BANANA box determines that the existing
tunnel is still functioning. A Tunnel 2 Deny message (with Error
Code = 8) will be sent to the local BANANA box. The local BANANA box
SHOULD terminate the GRE Tunnel Setup Request process immediately.
If the remote BANANA box does not receive a tunnel verification ACK
message after three attempts (one initial attempt and two retries),
it will regard the existing tunnel as failed, and the GRE Tunnel
Setup Request sent over Tunnel 2 will be accepted.
+-+-+-+-+-+-+-+-+
|Attribute Type | (1 byte)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Attribute Length | (2 bytes)
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Attribute Type
Tunnel Verification, set to 35.
Attribute Length
Set to 0.
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9. Security Considerations
See the Security Considerations of [BANANA-signaling].
10. IANA Considerations
IANA need not assign anything for this memo. RFC editor: please
remove this section before publication.
11. References
11.1. Normative References
[Port-NO] IANA, "Service Name and Transport Protocol Port Number
Registry", <http://www.iana.org/assignments/service-names-
port-numbers>.
[Pro-NO] IANA, "Assigned Internet Protocol Numbers",
<http://www.iana.org/assignments/protocol-numbers>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, DOI
10.17487/RFC2119, March 1997, <http://www.rfc-
editor.org/info/rfc2119>.
[RFC2697] Heinanen, J. and R. Guerin, "A Single Rate Three Color
Marker", RFC 2697, DOI 10.17487/RFC2697, September 1999,
<http://www.rfc-editor.org/info/rfc2697>.
[RFC2784] Farinacci, D., Li, T., Hanks, S., Meyer, D., and P.
Traina, "Generic Routing Encapsulation (GRE)", RFC 2784,
DOI 10.17487/RFC2784, March 2000, <http://www.rfc-
editor.org/info/rfc2784>.
[RFC2890] Dommety, G., "Key and Sequence Number Extensions to GRE",
RFC 2890, DOI 10.17487/RFC2890, September 2000,
<http://www.rfc-editor.org/info/rfc2890>.
[RFC4291] Hinden, R. and S. Deering, "IP Version 6 Addressing
Architecture", RFC 4291, DOI 10.17487/RFC4291,
February 2006, <http://www.rfc-editor.org/info/rfc4291>.
[RFC4632] Fuller, V. and T. Li, "Classless Inter-domain Routing
(CIDR): The Internet Address Assignment and
Aggregation Plan", BCP 122, RFC 4632, DOI
10.17487/RFC4632, August 2006, <http://www.rfc-
editor.org/info/rfc4632>.
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[TR-069] Broadband Forum, "CPE WAN Management Protocol", Issue: 1
Amendment 5, November 2013, <https://www.broadband-
forum.org/technical/download/ TR-069_Amendment-5.pdf>.
[TS23.401] 3GPP TS23.401, "General Packet Radio Service (GPRS)
enhancements for Evolved Universal Terrestrial Radio
Access Network (E-UTRAN) access", v11.7.0, September 2013.
[BANANA-signaling]
N. Leymann, C. Heidemann, et al, "BANdwidth Aggregation
for interNet Access (BANANA) The Control Protocol of
Bonding Tunnels", draft-leymann-banana-signaling, work
in progress.
11.2. Informative References
[802Type] IANA, "IEEE 802 Numbers",
<http://www.iana.org/assignments/ieee-802-numbers>.
[ANSI-X9.31-1998]
ANSI Standard X9.31-1998, "Digital Signatures Using
Reversible Public Key Cryptography for the Financial
Services Industry (rDSA)", 1998.
[RFC2724] Handelman, S., Stibler, S., Brownlee, N., and G. Ruth,
"RTFM: New Attributes for Traffic Flow Measurement", RFC
2724, DOI 10.17487/RFC2724, October 1999, <http://www.rfc-
editor.org/info/rfc2724>.
[RFC7031] Mrugalski, T. and K. Kinnear, "DHCPv6 Failover
Requirements", RFC 7031, DOI 10.17487/RFC7031, September
2013, <http://www.rfc-editor.org/info/rfc7031>.
Contributors
Li Xue
Individual
Email: xueli_jas@163.com
Zhongwen Jiang
Huawei Technologies
Email: jiangzhongwen@huawei.com
Authors' Addresses
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Nicolai Leymann
Deutsche Telekom AG
Winterfeldtstrasse 21-27
Berlin 10781
Germany
Phone: +49-170-2275345
Email: n.leymann@telekom.de
Cornelius Heidemann
Deutsche Telekom AG
Heinrich-Hertz-Strasse 3-7
Darmstadt 64295
Germany
Phone: +49-6151-5812721
Email: heidemannc@telekom.de
Lihao Chen
Huawei Technologies
No.156 Beiqing Rd. Haidian District,
Beijing 100095
P.R. China
EMail: lihao.chen@huawei.com
Mingui Zhang
Huawei Technologies
No.156 Beiqing Rd. Haidian District,
Beijing 100095
P.R. China
Email: zhangmingui@huawei.com
Behcet Sarikaya
Huawei USA
5340 Legacy Dr. Building 3
Plano, TX 75024
United States of America
Email: sarikaya@ieee.org
Margaret Cullen
Painless Security
14 Summer St. Suite 202
Malden, MA 02148
United States of America
Email: margaret@painless-security.com
Leymann, et al. Expires June 24, 2018 [Page 31]
INTERNET-DRAFT BANANA Attributes December 21, 2017
Leymann, et al. Expires June 24, 2018 [Page 32]
