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Step Command Remarks
4. Configure BGP route
distribution filtering policies.
• Reference an ACL or IPv6
prefix list to filter advertised
BGP routes:
filter-policy { acl6-number |
prefix-list ipv6-prefix-name }
export [ direct | isisv6
process-id | ospfv3
process-id | ripng process-id
| static ]
• Reference a routing policy to
filter BGP routes advertised
to a peer or peer group:
peer { group-name |
ipv6-address
[ prefix-length ] }
route-policy
route-policy-name export
• Reference an ACL to filter
BGP routes advertised to a
peer or peer group:
peer { group-name |
ipv6-address
[ prefix-length ] } filter-policy
acl6-number export
• Reference an AS path list to
filter BGP routes advertised
to a peer or peer group:
peer { group-name |
ipv6-address
[ prefix-length ] } as-path-acl
as-path-acl-number export
• Reference an IPv6 prefix list
to filter BGP routes
advertised to a peer or peer
group
peer { group-name |
ipv6-address
[ prefix-length ] } prefix-list
ipv6-prefix-name ex
port
Use at least one method.
Not configured by default.
Configuring BGP route reception filtering policies
You can use the following methods to configure BGP route reception filtering policies:
• Use an ACL or prefix list to filter routing information received from all peers.
• Use a routing policy, ACL, AS path list, or prefix list to filter routing information received from a
peer or peer group.
If you configure multiple filtering policies, apply them in the following sequence:
1. filter-policy import
2. peer filter-policy import
3. peer as-path-acl import
4. peer prefix-list import
5. peer route-policy import
Only routes passing all the configured policies can be received.
To configure BGP route reception filtering policies (IPv4):
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