HP 6127xlg Configuration Manual page 203

ASBR configuration:
•
Configure a routing protocol, and enable MPLS and LDP on the interface connecting to an
internal router of the AS.
Specify the PE in the same AS as an IBGP peer, and the ASBR in a different AS as an EBGP
peer.
Enable BGP to exchange labeled IPv4 unicast routes with the PE in the same AS and the ASBR
in different AS.
Enable MPLS on the interface connected to the remote ASBR. There is no need to configure a
label distribution protocol, for example, MPLS LDP.
Configure a routing policy to determine which IPv4 unicast routes are advertised to the IBGP or
EBGP peer with MPLS labels.
In addition, configure BGP to advertise routes destined for a PE on PEs or ASBRs. For more information,
see Layer 3—IP Routing Configuration Guide.
Configuring a PE
For basic MPLS L3VPN configurations on a PE, see
describes inter-AS option C specific configurations.
To configure a PE for inter-AS option C:
Step
1. Enter system view.
2. Enter BGP view.
3. Configure the ASBR in the
same AS as an IBGP peer.
4. Configure the PE of another
AS as an EBGP peer.
5. Create the BGP IPv4 unicast
address family and enter its
view.
6. Enable BGP to exchange IPv4
unicast routes with the ASBR
in the same AS.
7. Enable BGP to exchange
labeled IPv4 routes with the
ASBR in the same AS.
8. Return to BGP view.
9. Enter BGP VPNv4 address
family view.
10. Enable BGP to exchange
VPNv4 routes with the PE in
different ASs.
11. (Optional.) Configure the PE
to not change the next hop of
routes advertised to the EBGP
peer.
"Configuring basic MPLS
Command
system-view
bgp as-number
peer { group-name | ip-address
[ mask-length ] } as-number
as-number
peer { group-name | ip-address
[ mask-length ] } as-number
as-number
address-family ipv4 [ unicast ]
peer { group-name | ip-address
[ mask-length ] } enable
peer { group-name | ip-address
[ mask-length ] }
label-route-capability
quit
address-family vpnv4
peer { group-name | ip-address
[ mask-length ] } enable
peer { group-name | ip-address
[ mask-length ] }
next-hop-invariable
194
L3VPN." The following table
Remarks
N/A
N/A
By default, no BGP peer is created.
By default, no BGP peer is created.
By default, the BGP IPv4 unicast
address family is not created.
By default, BGP does not exchange
IPv4 unicast routes with any peer.
By default, BGP cannot exchange
labeled routes with any IPv4 peer
or peer group.
N/A
N/A
By default, BGP cannot exchange
VPNv4 routes with any peer.
Configure this command on the RR
so the RR does not change the next
hop of advertised VPNv4 routes.