526 | Intermediate System to Intermediate System
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IPv6 routes
Use these commands in ADDRESS-FAMILY IPV6 mode to apply prefix lists to incoming or outgoing 
IPv6 routes. =
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
Note: These commands apply to IPv6 IS-IS only. Use the ROUTER ISIS mode previously shown to apply 
prefix lists to IPv4 routes.
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, 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.
Command Syntax Command Mode Purpose