Assign multiple area addresses to isis areas, Assign multiple area addresses to is-is areas -23, Bed in – AIS Router AI2524 User Manual
Page 181: Assign multiple area address, Es to is-is areas, Assign multiple area addresses to is-is areas
Chapter 9: AI2524 OSI/CLNP Configuration Steps
August 1997
Page 9-23
2524UM
tag of remote-domain. Most comment lines have been eliminated from
this example to avoid redundancy.
router isis
net 39.0001.0001.0000.0c00.1111.00
1.
Redistribute iso-igrp routing information throughout remote-do-
main:
redistribute iso-igrp remote-domai n
!
router iso-igrp remote-domain
net 39.0002.0001.0000.0c00.1111.00
2.
Redistribute IS-IS routing information:
redistribute isis
!
interface ethernet 0
clns router isis
!
interface serial 0
clns router iso-igrp remote
Assign Multiple Area Addresses to IS-IS Areas
IS-IS routing supports the assignment of multiple area addresses on
the same router. This concept is referred to as multihoming. Multi-
homing provides a mechanism for smoothly migrating network ad-
dresses as:
z
Splitting up an area. Nodes within a given area can accumulate to
a point that they are difficult to manage, cause excessive traffic, or
threaten to exceed the usable address space for an area. Multiple
area addresses can be assigned so that you can smoothly partition
a network into separate areas without disrupting service.
z
Merging areas. Use transitional area addresses to merge as many
as three separate areas into a single area that share a common area
address.
z
Transition to a different address. You may need to change an are
address for a particular group of nodes. Use multiple area address-
es to allow incoming traffic intended for an old area address to
continue being routed to associated nodes.