3Com Switch 4800G 24-Port Configuration Manual page 473

n
Configuring Route
Reception Policy
n
Configuring IPv6 BGP
and IGP Route
Synchronization
To do...
Specify an IPv6 prefix list to
filer routes advertised to a
peer/peer group
Members of a peer group must have the same outbound route policy with the
■
peer group.
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.
Follow these steps to configure route reception policy:
To do...
Enter system view
Enter BGP view
Enter IPv6 address family view ipv6-family
Configure inbound route
filtering
Apply a routing policy to
routes from a peer/peer group
Specify an ACL to filter routes
imported from a peer/peer
group
Specify an AS path ACL to
filter routing information
imported from a peer/peer
group
Specify an IPv6 prefix list to
filter routing information
imported from a peer/peer
group
Specify the upper limit of
address prefixes imported
from a peer/peer group
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.
■
With this feature enabled and when a non-BGP router is responsible for
forwarding packets in an AS, IPv6 BGP speakers in the AS cannot advertise routing
information to outside ASs unless all routers in the AS know the latest routing
information.
By default, when a BGP router receives an IBGP route, it only checks the
reachability of the route's next hop before advertisement. If the synchronization
feature is configured, only the IBGP route is advertised by IGP can the route be
advertised to EBGP peers.
Controlling Route Distribution and Reception
Use the command...
peer { ipv6-group-name |
ipv6-address } ipv6-prefix
ipv6-prefix-name export
Use the command...
system-view
bgp as-number
filter-policy { acl6-number |
ipv6-prefix
ipv6-prefix-name } import
peer { ipv6-group-name |
ipv6-address } route-policy
route-policy-name import
peer { ipv6-group-name |
ipv6-address } filter-policy
acl6-number import
peer { ipv6-group-name |
ipv6-address } as-path-acl
as-path-acl-number import
peer { ipv6-group-name |
ipv6-address } ipv6-prefix
ipv6-prefix-name import
peer { ipv6-group-name |
ipv6-address } route-limit
limit [ percentage ]
473
Remarks
Required
Not specified by default
Remarks
-
-
-
Required
Not configured by default
Required
Not applied by default
Required
Not specified by default
Required
Not specified by default
Required
Not specified by default
Optional
By default, no limit on prefixes