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prefix-list prefix-list-name: Specifies an IPv4 prefix list by its name, a case-sensitive string of 1 to 63
characters, to filter routes from Level-2 to Level-1 by destination address.
route-policy route-policy-name: Uses the specified routing policy to filter routes from Level-2 to Level-1. The
route-policy-name argument is a case-sensitive string of 1 to 63 characters.
tag tag: Specifies a tag for marking redistributed routes, in the range of 1 to 4294967295.
Usage guidelines
If a routing policy is used, the routing policy must be specified in the import-route isis level-2 into level-1
command to filter routes from Level-2 to Level-1. Other routing policies specified for route reception and
redistribution does not affect the route leaking.
If a filtering policy is configured, only Level-2 routes not filtered out can be advertised into the Level-1
area.
Examples
# Enable route advertisement from Level-2 to Level-1.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] import-route isis level-2 into level-1
Related commands
• import-route
• import-route isis level-1 into level-2
import-route limit
Use import-route limit to configure the maximum number of redistributed Level 1/Level 2 IPv4 routes.
Use undo import-route limit to restore the default.
Syntax
import-route limit number
undo import-route limit
Default
The maximum number of redistributed Level 1/Level 2 IPv4 routes is not configured.
Views
IS-IS view
Predefined user roles
network-admin
Parameters
number: Specifies the maximum number of redistributed Level 1/Level 2 IPv4 routes, in the range of 1 to
16384 .
Examples
# Configure IS-IS process 1 to redistribute up to 1000 Level 1/Level 2 IPv4 routes.
<Sysname> system-view
[Sysname] isis 1
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