Summary addresses are introduced in Summary Addresses. L2 routers include in their L2 LSPs a list of all
destinations reachable in the L1 area attached to them by default. Summarization of the L1
destinations reduces the amount of information stored on each L2 router and helps in scaling
to a large routing domain.
-
To add summary addresses to an IS-IS router, use the
following command:
configure
isis area area_name add summary-address [ipv4_address_mask | ipv6_address_mask] {level [1 | 2]}
-
To delete summary addresses from an IS-IS router, use the
following command:
configure
isis area area_name delete summary-address [ipv4_address_mask | ipv6_address_mask] {level [1 | 2]}
-
To display the configured summary addresses for an IS-IS
router, use the following command:
show isis
area area_name summary-addresses
