Configuring Routing Policies; Overview; Filters - HP VSR1000 Configuration Manual

Configuring routing policies

Routing policies control routing paths by filtering and modifying routing information. This chapter
describes both IPv4 and IPv6 routing policies.

Overview

Routing policies can filter advertised, received, and redistributed routes, and modify attributes for specific
routes.
To configure a routing policy:
1. Configure filters based on route attributes, such as destination address and the advertising router's
address.
2. Create a routing policy and apply filters to the routing policy.

Filters

Routing policies can use the following filters to match routes.
ACL
ACLs include IPv4 ACLs and IPv6 ACLs. An ACL can match the destination or next hop of routes.
For more information about ACLs, see ACL and QoS Configuration Guide.
IP prefix list
IP prefix lists include IPv4 prefix lists and IPv6 prefix lists.
An IP prefix list matches the destination address of routes. You can use the gateway option to receive
routes only from specific routers. For more information about the gateway option, see
and "Configuring
An IP prefix list, identified by name, can contain multiple items. Each item, identified by an index number,
specifies a prefix range to match. An item with a smaller index number is matched first. A route that
matches one item matches the IP prefix list.
AS path list
An AS path list matches the AS_PATH attribute of BGP routes.
For more information about AS path lists, see
Community list
A community list matches the COMMUNITY attribute of BGP routes.
For more information about community lists, see
Extended community list
An extended community list matches the extended community attribute (Route-Target for VPN and Source
of Origin) of BGP routes.
OSPF."
"Configuring BGP."
"Configuring BGP."
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"Configuring RIP"