Reference Guide

Intermediate System to Intermediate System | 515
Redistribute routes
In addition to filtering routes, you can add routes from other routing instances or protocols to the IS-IS
process. With the
redistribute command syntax, you can include BGP, OSPF, RIP, static, or directly
connected routes in the IS-IS process.
IPv4 routes
Use any of the following commands in ROUTER ISIS mode to add routes from other routing instances or
protocols.
Command Syntax Command Mode Purpose
distribute-list prefix-list-name
in [interface]
ROUTER ISIS-AF
IPV6
Apply a configured prefix list to all incoming IPv6 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.
• 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-AF
IPV6
Apply a configured prefix list to all outgoing IPv6 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-AF
IPV6
Deny RTM download for pre-existing redistributed IPv6 routes
Note: Do not route iBGP routes to IS-IS unless there are route-maps associated with the IS-IS
redistribution.
Note: These commands apply to IPv4 IS-IS only. Use the ADDRESS-FAMILY IPV6 mode shown later to
apply prefix lists to IPv6 routes.