3Com Switch 8800 Advanced Software V5 Configuration Guide

Controlling Route Distribution and Reception 475
n
■ After configuring the filtering of routes to a peer group, you can also configure
the filtering of routes to a member of the peer group, and the last
configuration takes effect.
■ IPv6 BGP advertises routes passing the specified policy to peers. Using the
protocol argument can filter only the specified protocol routes. If no protocol
specified, IPv6 BGP filters all routes to be advertised, including redistributed
routes and routes imported using the network command.
Configuring Route
Reception Policy
To configure route reception policy, use the following commands:
n
■ Only routes passing the specified policy can be added into the local IPv6 BGP
routing table.
■ Members of a peer group can have different inbound route policies.
Specify an AS path ACL to
filer routes advertised to a
peer/peer group
peer { ipv6-group-name |
ipv6-address } as-path-acl
as-path-acl-number export
Required
Not specified by default
Specify an IPv6 prefix list to
filer routes advertised to a
peer/peer group
peer { ipv6-group-name |
ipv6-address } ipv6-prefix
ipv6-prefix-name export
Required
Not specified by default
To do... Use the command... Remarks
To do... Use the command... Remarks
Enter system view system-view -
Enter BGP view bgp as-number -
Enter IPv6 address family view ipv6-family -
Configure inbound route
filtering
filter-policy { acl6-number |
ipv6-prefix ipv6-prefix-name
} import
Required
Not configured by default
Apply a routing policy to
routes from a peer/peer group
peer { ipv6-group-name |
ipv6-address } route-policy
route-policy-name import
Required
Not applied by default
Reference an ACL to filter
routes imported from a
peer/peer group
peer { ipv6-group-name |
ipv6-address } filter-policy
acl6-number import
Required
Not specified by default
Reference an AS path ACL to
filter routing information
imported from a peer/peer
group
peer { ipv6-group-name |
ipv6-address } as-path-acl
as-path-acl-number import
Required
Not specified by default
Reference an IPv6 prefix list to
filter routing information
imported from a peer/peer
group
peer { ipv6-group-name |
ipv6-address } ipv6-prefix
ipv6-prefix-name import
Required
Not specified by default
Specify the upper limit of
address prefixes imported
from a peer/peer group
peer { ipv6-group-name |
ipv6-address } route-limit
limit [ percentage ]
Optional
By default, the number of
prefixes is unlimited.
If the received IPv6 prefixes
exceed the upper limit, the
neighbor is still maintained
but the exceeding routes will
be discarded.