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Configure the prefix list in the PREFIX LIST mode prior to assigning it to the IS-IS process. For
configuration information on prefix lists, see Chapter 6, Access Control Lists (ACLs).
IPv4 routes
Use the following commands in ROUTER ISIS mode to apply prefix lists to incoming or outgoing IPv4
routes.
Note: These commands apply to IPv4 IS-IS only. Use the ADDRESS-FAMILY IPV6 mode shown later to
apply prefix lists to IPv6 routes
Command Syntax Command Mode Purpose
distribute-list prefix-list-name in [interface] ROUTER ISIS Apply a configured prefix list to all incoming
IPv4 IS-IS routes.
Enter the type of interface and slot/port
information:
• For a 1-Gigabit Ethernet interface, enter
the keyword GigabitEthernet followed by
the slot/port information.
• For the Loopback interface on the RPM,
enter the keyword loopback followed by a
number from 0 to 16383.
• For a port channel, enter the keyword
port-channel followed by a number from
1 to 255 for TeraScale and ExaScale, 1 to
32 for EtherScale.
• For a SONET interface, enter the keyword
sonet followed by slot/port information.
• For a 10-Gigabit Ethernet interface, enter
the keyword TenGigabitEthernet followed
by the slot/port information.
• For a VLAN, enter the keyword vlan
followed by a number from 1 to 4094.
E-Series ExaScale platforms support
4094 VLANs with FTOS version
8.2.1.0 and later. Earlier ExaScale
supports 2094 VLANS.
distribute-list prefix-list-name out [bgp
as-number | connected | ospf process-id | rip |
static]
ROUTER ISIS Apply a configured prefix list to all outgoing
IPv4 IS-IS routes. 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
distribute-list redistributed-override in
ROUTER ISIS Deny RTM download for pre-existing
redistributed IPv4 routes
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