H3C Technologies H3C S12500-X Series Switches - Manual (Page 138)

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Step Command Remarks
3. Enter BGP-VPNv4 address
family view.
address-family vpnv4 N/A
4. Configure filtering of
advertised routes.
filter-policy { acl-number |
prefix-list prefix-list-name } export
[ protocol process-id ] Optional.
By default, BGP does not filter
advertised routes.
5. Configure filtering of received
routes.
filter-policy { acl-number |
prefix-list prefix-list-name } import
Optional.
By default, BGP does not filter
received routes.
6. Advertise community
attributes to a peer or peer
group.
peer { group-name | ip-address }
advertise-community
Optional.
By default, no community attributes
are advertised to any peer or peer
group.
7. Allow the local AS number to
appear in the AS_PATH
attribute of routes received
from the peer, and set the
maximum number of
repetitions.
peer { group-name | ip-address }
allow-as-loop [ number ]
By default, BGP discards route
updates that contain the local AS
number.
8. Filter routes received from or
advertised to a peer or peer
group based on an AS_PATH
list.
peer { group-name | ip-address }
as-path-acl aspath-filter-number
{ import | export }
Optional.
By default, no AS filtering list is
applied to a peer or peer group.
9. Advertise a default VPN route
to a peer or peer group.
peer { group-name | ip-address }
default-route-advertise
vpn-instance vpn-instance-name
Optional.
By default, no default VPN route is
advertised to a peer or peer group.
10. Apply an ACL to filter routes
received from or advertised to
a peer or peer group.
peer { group-name | ip-address }
filter-policy acl-number { export |
import }
Optional.
By default, no ACL-based filtering
is configured.
11. Save all route updates from a
peer or peer group.
peer { group-name | ip-address }
keep-all-routes By default, BGP does not save
route updates from any peer.
12. Specify the router as the next
hop of routes sent to a peer or
peer group.
peer { group-name | ip-address }
next-hop-local
By default, the router sets itself as
the next hop for routes sent to a
peer or peer group.
13. Configure BGP to not change
the next hop of routes sent to
an EBGP peer or peer group.
peer { group-name | ip-address }
next-hop-invariable
Optional.
By default, the router sets itself as
the next hop for routes sent to an
EBGP peer or peer group.
In an inter-AS option C network
where an RR is used to advertise
VPNv4 routes, configure this
command on the RR so the RR does
not change the next hop of routes
sent to EBGP peers and clients.
14. Specify a preferred value for
routes received from a peer or
peer group.
peer { group-name | ip-address }
preferred-value value Optional.
By default, the preferred value is 0.