Configuring Inter-As Option C - HP FlexNetwork HSR6600 Configuration Manual

Enable MPLS capability on the interface connected to the ASBR in another AS. There is no
need to configure a label distribution protocol, for example, LDP.
An ASBR always sets itself as the next hop of VPNv4 routes advertised to an MP-IBGP peer
regardless of the peer next-hop-local command.
To configure inter-AS option B on an ASBR:
Step
1. Enter system view.
2. Enter interface view of the
interface connected to an
internal router of the AS.
3. Enable MPLS on the
interface.
4. Enable MPLS LDP on the
interface.
5. Return to system view.
6. Enter interface view of the
interface connected to the
remote ASBR.
7. Enable MPLS on the
interface.
8. Return to system view.
9. Enter BGP instance view.
10. Create a BGP peer.
11. Enter BGP VPNv4 address
family view.
12. Enable BGP to exchange
VPNv4 routes with the PE in
the same AS and the ASBR
in different ASs.
13. Disable route target filtering
of VPNv4 routes.

Configuring inter-AS option C

To configure inter-AS option C, perform configurations on PEs and ASBRs.
•
PE configuration:
Configure basic MPLS L3VPN, and specify the PE in another AS as an MP-EBGP peer. The
route targets for the VPN instances on the PEs in different ASs must match for the same
VPN. For information about PE configuration, see
Command
system-view
interface interface-type
interface-number
mpls enable
mpls ldp enable
quit
interface interface-type
interface-number
mpls enable
quit
bgp as-number [ instance
instance-name ]
peer { group-name | ipv4-address
[ mask-length ] } as-number
as-number
address-family vpnv4
peer { group-name | ipv4-address
[ mask-length ] } enable
undo policy vpn-target
226
Remarks
N/A
N/A
By default, MPLS is disabled on
the interface.
By default, MPLS LDP is disabled
on the interface.
N/A
N/A
By default, MPLS is disabled on
the interface.
N/A
N/A
By default, no BGP peers exist.
Configure PEs in the same AS as
IBGP peers, and ASBRs in
different ASs as EBGP peers.
N/A
By default, BGP cannot exchange
VPNv4 routing information with a
peer.
By default, route target filtering is
enabled for received VPNv4
routes. Only VPNv4 routes whose
export route target attribute
matches local import route target
attribute are added to the routing
table.
"Configuring basic MPLS L3VPN."