HP MSR2000/3000/4000 Router Series MPLS Configuration Guide

135
Ste
p
Command Remarks
16. Configure BGP updates
advertised to an EBGP peer or
peer group to carry only
public AS numbers.
peer { group-name | ip-address }
public-as-only
Optional.
By default, BGP route updates
advertised to an EBGP peer or peer
group can carry both public and
private AS numbers.
17. Configure the router as a route
reflector and specify a peer or
peer group as its client.
peer { group-name | ip-address }
reflect-client
By default, no RR is configured.
18. Specify the maximum number
of routes BGP can receive
from a peer or peer group.
peer { group-name | ip-address }
route-limit prefix-number
[ { alert-only | reconnect
reconnect-time } |
percentage-value ] *
By default, the number of routes
that BGP can receive from a peer
or peer group is not limited.
19. Apply a routing policy to a
peer or peer group.
peer { group-name | ip-address }
route-policy route-policy-name
{ export | import }
By default, no routing policy is
applied to a peer or peer group.
20. Enable route target-based
filtering of received VPNv4
routes.
policy vpn-target By default, this feature is enabled.
21. Enable route reflection
between clients.
reflect between-clients
By default, route reflection
between clients is enabled on the
RR.
22. Configure a cluster ID for the
route reflector.
reflector cluster-id { cluster-id |
ip-address }
By default, the RR uses its own
router ID as the cluster ID.
23. Configure filtering of reflected
routes.
rr-filter
extended-community-list-number
By default, the RR does not filter
reflected routes.
Configuring inter-AS VPN
If the MPLS backbone spans multiple ASs, you must configure inter-AS VPN.
Before you configure an inter-AS VPN, complete the following tasks:
• Configure an IGP for the MPLS backbones in each AS.
• Configure basic MPLS for the MPLS backbone of each AS.
• Configure MPLS LDP for the MPLS backbone of each AS so that LDP LSPs can be established.
• Configure basic MPLS L3VPN for each AS.
When configuring basic MPLS L3VPN for each AS, specific configurations might be required on PEs or
ASBR PEs. This depends on the inter-AS VPN solution selected.
Configuring inter-AS option A
Inter-AS option A applies to scenarios with a few VPNs.
To configure inter-AS option A, create VPN instances on PEs and ASBR PEs. The VPN instances on PEs are
used to allow CEs to access the network, and the VPN instances on ASBR PEs are used to access the peer
ASBR PEs. An ASBR PE considers the peer ASBR PE as an CE.