Administrator Guide

Configure the prefix list in PREFIX LIST mode prior to assigning it to the IS-IS process. For configuration information on prefix
lists, refer to Access Control Lists (ACLs).
Applying IPv4 Routes
To apply prefix lists to incoming or outgoing IPv4 routes, use the following commands.
NOTE: These commands apply to IPv4 IS-IS only. To apply prefix lists to IPv6 routes, use ADDRESS-FAMILY IPV6 mode,
shown later.
● Apply a configured prefix list to all incoming IPv4 IS-IS routes.
ROUTER ISIS mode
distribute-list prefix-list-name in [interface]
○ Enter the type of interface and slot/port information:
○ For a 1-Gigabit Ethernet interface, enter the keyword GigabitEthernet then the slot/port information.
○ For the Loopback interface on the RPM, enter the keyword loopback then a number from 0 to 16383.
○ For a port channel, enter the keywords port-channel then a number.
○ For a SONET interface, enter the keyword sonet then the slot/port information.
○ For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port information.
○ For a VLAN, enter the keyword vlan then a number from 1 to 4094.
● Apply a configured prefix list to all outgoing IPv4 IS-IS routes.
ROUTER ISIS mode
distribute-list prefix-list-name out [bgp as-number | connected | ospf process-id | rip |
static]
You can configure one of the optional parameters:
○ connected: for directly connected routes.
○ ospf process-id: for OSPF routes only.
○ rip: for RIP routes only.
○ static: for user-configured routes.
○ bgp: for BGP routes only.
● Deny RTM download for pre-existing redistributed IPv4 routes.
ROUTER ISIS mode
distribute-list redistributed-override in
Applying IPv6 Routes
To apply prefix lists to incoming or outgoing IPv6 routes, use the following commands.
NOTE:
These commands apply to IPv6 IS-IS only. To apply prefix lists to IPv4 routes, use ROUTER ISIS mode, previously
shown.
● Apply a configured prefix list to all incoming IPv6 IS-IS routes.
ROUTER ISIS-AF IPV6 mode
distribute-list prefix-list-name in [interface]
Enter the type of interface and slot/port information:
○ For a 1-Gigabit Ethernet interface, enter the keyword GigabitEthernet then the slot/port information.
○ For the Loopback interface on the RPM, enter the keyword loopback then a number from 0 to 16383.
○ For a port channel, enter the keywords port-channel then a number.
○ For a SONET interface, enter the keyword sonet then the slot/port information.
○ For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port information.
○ For a VLAN, enter the keyword vlan then a number from 1 to 4094.
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Intermediate System to Intermediate System