HP 6127xlg Configuration Manual page 204

Configuring an ASBR
To set up an inter-AS public tunnel for the inter-AS option C solution, an ASBR must assign an MPLS label
to the route destined for a PE, and advertise the label along with the route. Typically, the routes advertised
by an ASBR through BGP include the PE address as well as other routes. You can configure a routing
policy to filter routes. Routes surviving the filtering are assigned labels, and all others are advertised as
common IPv4 routes.
To configure a routing policy, use the following commands:
if-match mpls-label—Matches routes carrying MPLS labels.
•
apply mpls-label—Sets MPLS labels for IPv4 routes to be advertised to a peer. You can use this
•
command together with if-match clauses. For example, when used together with the if-match
mpls-label command, the apply mpls-label sets new MPLS labels for routes with MPLS labels. The
newly assigned labels are advertised along with the routes.
For more information about routing policy configuration, see Layer 3—IP Routing Configuration Guide.
To configure an ASBR-PE for inter-AS option C:
Step
1. Enter system view.
(Optional.) Create a routing
2.
policy, and enter routing
policy view.
3. (Optional.) Match IPv4 routes
carrying labels.
4. (Optional.) Set labels for IPv4
routes.
5. Return to system view.
6. Enter interface view of the
interface connected to an
internal router of the AS.
7. Enable MPLS on the interface.
8. Enable MPLS LDP on the
interface.
9. Return to system view.
10. Enter interface view of the
interface connected to the
remote ASBR.
11. Enable MPLS on the interface.
12. Return to system view.
13. Enter BGP view.
14. Configure the PE in the same
AS as an IBGP peer.
Command
system-view
route-policy route-policy-name
{ deny | permit } node
node-number
if-match mpls-label
apply mpls-label
quit
interface interface-type
interface-number
mpls enable
mpls ldp enable
quit
interface interface-type
interface-number
mpls enable
quit
bgp as-number
peer { group-name | ip-address
[ mask-length ] } as-number
as-number
195
Remarks
N/A
By default, no routing policy is
created.
By default, no MPLS label match
criterion is configured.
By default, no MPLS label is set for
IPv4 routes.
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 peer is created.