Introduction To Ipv6 Is-Is; Configuring Ipv6 Is-Is Basic Functions; Configuration Prerequisites - 3Com MSR 50 Series Configuration Manual

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Introduction to IPv6
IS-IS
Configuring IPv6 IS-IS
Basic Functions
Configuration
Prerequisites
IP 6 IS-IS C
V
When configuring IPv6 IS-IS, go to these sections for information you are
interested in:
"Introduction to IPv6 IS-IS" on page 1043
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"Configuring IPv6 IS-IS Basic Functions" on page 1043
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"Configuring IPv6 IS-IS Routing Information Control" on page 1044
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"Displaying and Maintaining IPv6 IS-IS" on page 1045
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"IPv6 IS-IS Configuration Example" on page 1046
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The IS-IS routing protocol (Intermediate System-to-Intermediate System
intra-domain routing information exchange protocol) supports multiple network
protocols, including IPv6. IS-IS with IPv6 support is called IPv6 IS-IS dynamic
routing protocol. The International Engineer Task Force (IETF) defines two
Type-Length-Values (TLVs) and a new Network Layer Protocol Identifier (NLPID) to
enable IPv6 support for IS-IS.
TLV is a variable field in the Link State PDU or Link State Packet (LSP). The two TLVs
are:
IPv6 Reachability: Defines the prefix, metric of routing information to indicate
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the network reachability, with a type value of 236 (0xEC).
IPv6 Interface Address: Similar with the "IP Interface Address" TLV of IPv4, it
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transforms the 32-bit IPv4 address to the 128-bit IPv6 address.
NLPID is an 8-bit field with a value of 142 (0x8E), which indicates the network
layer protocol packet. If the IS-IS router supports IPv6, the advertised routing
information must be marked with the NLPID.
For information about IS-IS, refer to
n
You can implement IPv6 inter-networking through configuring IPv6 IS-IS in IPv6
network environment.
Before the configuration, accomplish the following tasks first:
Enable IPv6 globally
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Configure IP addresses for interfaces, and make sure all neighboring nodes are
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reachable.
ONFIGURATION
"IS-IS Configuration" on page 877.