Reference Guide

Intermediate System to Intermediate System | 513
eljefe.02-00 * 0x00000001 0x2E7F 1113 0/0/0
FTOS.00-00 0x00000004 0xCDA9 1107 0/0/0
FTOS#
Control routing updates
Use the following commands in ROUTER ISIS mode to control the source of IS-IS route information.
Distribute Routes
Another method of controlling routing information is to filter the information through a prefix list. Prefix
lists are applied to incoming or outgoing routes and routes must meet the conditions of the prefix lists or
FTOS does not install the route in the routing table. The prefix lists are globally applied on all interfaces
running IS-IS.
Configure the prefix list in the PREFIX LIST mode prior to assigning it to the IS-IS process. For
configuration information on prefix lists, refer to Chapter 10, IP Access Control Lists (ACL), Prefix Lists,
and Route-maps.
IPv4 routes
Use the following commands in ROUTER ISIS mode to apply prefix lists to incoming or outgoing IPv4
routes.
Command Syntax Command Mode Purpose
passive-interface interface ROUTER ISIS Disable a specific interface from sending or receiving IS-IS routing
information.
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.
• 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.
Note: These commands apply to IPv4 IS-IS only. Use the ADDRESS-FAMILY IPV6 mode shown later to
apply prefix lists to IPv6 routes