C h a p t e r
7
IS-ISv6 Configuration
Table of Contents
IS-ISv6 Overview ..............................................................43
IS-ISv6 Basic Configuration ................................................44
Configuring IS-ISv6 Maintenance and Diagnosis ....................48
IS-ISv6 Configuration Examples ..........................................49
IS-ISv6 Overview
has an early development. ISO10589 and RFC1195 defined
how to use the IS-IS as the link state routing protocol to provide
service to the TCP/IP. The subsequent specifications perfect the
IS-IS protocol gradually. The latest draft defines how to use the
IS-IS to support the IPv6.
IS-IS is a routing protocol with high expansibility, it can support
the Connectionless Network Service (
) routing protocol ex-
panding to support the IPv4 and support the IPv6.
The draft-ietf-isis-IPv6-05.txt (Routing IPv6 with IS-IS) draft de-
fines two new Type Length Values (
): IPv6 reachability and IPv6
Interface Address.
�
IPv6 Reachability
TLV type value of the IPv6 reachability TLV is 236 (0xEC). Its
TLV effects are equal to the two TLVs of the IPv4: IP internally
reachable and IP externally reachable. Up/down and external
are defined in this TLV and are used to indicate that routes are
redistributed mutually in the L2/L1 and to determine whether
a route is an external route.
�
IPv6 Interface Address
TLV type value of the IPv6 Interface Address TLV is 232(0xE8).
Its TLV effects are equal to the TLV of the IPv4: IP port address.
The difference is that the original 32-bit address segment is
superseded by the 128-bit address segment in the new TLV.
Uni-topology IS-IS can only run a single Shortest Path First (
algorithm. The topologies corresponding to IPv4 and IPv6 must
be identical and with special restriction. While the multi-topol-
ogy IS-IS can run multiple SPF algorithms. Then, the topologies
corresponding to IPv4 and IPv6 may be different and with some
flexibility.
Confidential and Proprietary Information of ZTE CORPORATION
43
Summary of Contents for ZXR10 T1200
Page 5: ...Figures 71 Tables 73 List of Glossary 75 ...
Page 6: ......