H3C S3610-28P Operation Manual page 617

Operation Manual – IPv6 Routing
H3C S3610&S5510 Series Ethernet Switches
Chapter 4 IPv6 IS-IS Configuration
Note:
IPv6 IS-IS supports all the features of IPv4 IS-IS except that it advertises IPv6
routing information instead. This document describes only IPv6 IS-IS exclusive
configuration tasks. For other configuration tasks, refer to the part discussing IPv4
routing.
The term "router" in this document refers to a Layer 3 switch running routing
protocols.
Verify that the system already operates in IPv4/IPv6 dual-stack mode before
configuring IPv6 routing.
All the IPv6 routing related configuration mentioned in this manual assumes that the
system already operates in IPv4/IPv6 dual-stack mode. For dual stack mode
configuration, see the part covering dual stack in the IPv6 Configuration module.
When configuring IPv6 IS-IS, go to these sections for information you are interested in:
Introduction to IPv6 IS-IS
Configuring IPv6 IS-IS Basic Functions
Configuring IPv6 IS-IS Routing Information Control
Displaying and Maintaining IPv6 IS-IS
IPv6 IS-IS Configuration Example
4.1 Introduction to IPv6 IS-IS
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 the
network reachability, with a type value of 236 (0xEC).
IPv6 Interface Address: Similar with the "IP Interface Address" TLV of IPv4, it
transforms the 32-bit IPv4 address to the 128-bit IPv6 address.
Chapter 4 IPv6 IS-IS Configuration
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