H3C Technologies H3C SecPath F1000-E - Manual (Page 844)

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Configuring IPv6 IS-IS
NOTE:
•
This chapter describes how to configure IPv6 IS-IS, which supports all IPv4 IS-IS features except that it
advertises IPv6 routing information instead. For more information about IS-IS, see “Configuring IS-IS.”
• The term "router" in this chapter refers to both routers and Layer 3 firewalls.
• The IPv6 IS-IS configuration is available only at the CLI.
Feature and hardware compatibility
Feature F1000-A-EI/E-SI/S-AI F1000-E F5000-A5 Firewall module
IPv6 IS-IS No No Yes No
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. The international engineer task
force (IETF) defines two type-length-values (TLVs) and a new network layer protocol identifier (NLPID) to
enable IS-IS to support IPv6.
TLV is a variable-length 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 network reachability,
and has a type value of 236 (0xEC).
• IPv6 Interface Address—Same as the “IP Interface Address” TLV in IPv4 ISIS, except that the 32-bit
IPv4 address is translated to the 128-bit IPv6 address.
The NLPID is an 8-bit field that identifies which network layer protocol is supported. For IPv6, the NLPID
is 142 (0x8E), which must be carried in hello packets sent by a router that supports IPv6 IS-IS.
Configuring IPv6 IS-IS basic functions
NOTE:
You can implement IPv6 inter-networking through configuring IPv6 IS-IS in IPv6 network environment.
Configuration prerequisites
Before the configuration, complete the following tasks:
• Enable IPv6 globally.