-
Enter the
configure terminal command to access global configuration mode.
device# configure terminal
-
Enter the
router isis command to enter IS-IS router configuration mode and enable IS-IS on the device.
device(config)# router isis
-
Enter the
address-family ipv6 unicast
command to enable ISIS address-family IPv6 unicast configuration mode.
device(config-isis-router)# address-family ipv6 unicast
-
Enter the
summary-prefix command with the level-1 parameter, specifying an IPv6 address and network mask, to configure a summary prefix and network mask for Level 1 routes.
device(config-router-isis-ipv6u)# summary-prefix 2001:db8::/32 level-1
The following example configures asummary-prefix of 2001:db8::/32 for Level 1 routes.
device# configure terminal
device(config)# router isis
device(config-isis-router)# address-family ipv6 unicast
device(config-router-isis-ipv6u)# summary-prefix 2001:db8::/32 level-1
