Configuring An Ospf Sham Link; Configuring A Loopback Interface; Redistributing The Loopback Interface Route And Ospf Routes Into Bgp - HP HSR6800 Configuration Manual

Step
6. Advertise routes to the UPE.

Configuring an OSPF sham link

The sham link is considered an OSPF intra-area route. It makes sure the VPN traffic is transmitted
over the backbone instead of the backdoor link between two CEs.
The source and destination addresses of the sham link must be loopback interface addresses with
32-bit masks. Besides, the loopback interfaces must be bound to the VPN instances and be
advertised through BGP.
Before you configure an OSPF sham link, complete the following tasks:
•
Configure basic MPLS L3VPN (OSPF is used between PEs and CEs).
•
Configure OSPF in the LAN where CEs reside.

Configuring a loopback interface

Step
1. Enter system view.
2. Create a loopback interface
and enter loopback interface
view.
3. Bind the loopback interface
to a VPN instance.
4. Configure the address of the
loopback interface.
Redistributing the loopback interface route and OSPF routes
into BGP
Step
1. Enter system view.
2. Enter BGP view.
Command
•
(Method 1) Advertise a
default VPN route:
peer { group-name |
ip-address }
default-route-advertise
vpn-instance
vpn-instance-name
•
(Method 2) Advertise routes
permitted by a routing policy:
peer { group-name |
ip-address } upe
route-policy
route-policy-name export
Command
system-view
interface loopback
interface-number
ip binding vpn-instance
vpn-instance-name
ip address ip-address { mask |
mask-length }
Command
system-view
bgp as-number
280
Remarks
Use either command. Do not use
both the commands.
By default, BGP does not
advertise routes to a VPNv4 peer.
With the peer
default-route-advertise
vpn-instance command
configured, the SPE always
advertises a default route using
the local address as the next hop
address to the UPE, regardless of
whether the default route is
present in the local routing table
or not.
Remarks
N/A
N/A
By default, an interface is
associated with no VPN instance.
N/A