Use this command to create an aggregate IS-IS address for summarization of routes.
| ip-address/length | Specifies an IP address in dotted notation followed by the length. |
None.
IS-IS router configuration for IPv4 addresses.
IPv6 unicast address family configuration for IPv6 addresses.
Summarizing addresses reduces the number of LSPs and the size of the link state database. Multiple addresses can be summarized for a given IS-IS instance.
To summarize a unicast IPv6 address, you must be in the IPv6 unicast family address configuration mode. Use address-family to enter IPv6 unicast family address configuration mode.
The “no” form of this command deletes the IS-IS aggregate address configuration.
This example shows how to apply address summarization to prefix 20.10.1.0/24:
System(rw)->configure System(rw-config)->router isis System(rw-config-isis)->summary-address 20.10.1.0/24 System(rw-config-isis)->
This example shows how to apply address summarization to prefix 2003:2010::0/64:
System(rw)->configure System(rw-config)->router isis System(rw-config-isis)->address-family ipv6 unicast System(rw-config-isis-af)->summary-address 2003:2010::0/64 System(rw-config-isis-af)->
Print
this page
Email this topic
Feedback
View PDF
Download EPUB