6-4
If all items are set to the deny mode, no routes can pass the IPv6 prefix list. Therefore, you need to
define the permit :: 0 less-equal 128 item following multiple deny items to allow other IPv6 routing
information to pass.
For example, the following configuration filters routes 2000:1::/48, 2000:2::/48 and 2000:3::/48, but
allows other routes to pass.
<Sysname> system-view
[Sysname] ip ipv6-prefix abc index 10 deny 2000:1:: 48
[Sysname] ip ipv6-prefix abc index 20 deny 2000:2:: 48
[Sysname] ip ipv6-prefix abc index 30 deny 2000:3:: 16
[Sysname] ip ipv6-prefix abc index 40 permit :: 0 less-equal 128
Configuring a Route Policy
A route policy is used to filter routing information, and modify attributes of matching routing information.
The match criteria of a route policy can be configured by referencing filters above mentioned.
A route policy can comprise multiple nodes, and each route policy node contains:
z if-match clauses: Define the match criteria that routing information must satisfy. The matching
objects are some attributes of routing information.
z apply clauses: Specify the actions to be taken on routing information that has satisfied the match
criteria, such as route attribute modification.
Prerequisites
Before configuring this task, you need to configure:
z Filters
z Routing protocols
You also need to decide on:
z Name of the route policy, and node numbers
z Match criteria
z Attributes to be modified
Creating a Route Policy
Follow these steps to create a route policy:
To do… Use the command… Remarks
Enter system view system-view —
Create a route policy, specify a
node for it and enter route
policy node view
route-policy route-policy-name { permit |
deny } node node-number
Required
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