Configuring A Loopback Interface; Redistributing The Loopback Interface Address; Creating A Sham Link - HP FlexNetwork 10500 Series Configuration Manual

Before you configure an OSPF sham link, perform the following tasks:
•
Configure basic MPLS L3VPN (OSPF is used between PE and CE).
•
Configure OSPF in the LAN where customer CEs reside.

Configuring a loopback interface

Step
1. Enter system view.
2. Create a loopback interface
and enter loopback interface
view.
3. Associate the loopback
interface with a VPN
instance.
4. Configure an IP address for
the loopback interface.

Redistributing the loopback interface address

Step
1. Enter system view.
2. Enter BGP instance view.
3. Enter BGP-VPN instance view.
4. Enter BGP-VPN IPv4 unicast
address family view.
5. Redistribute direct routes into
BGP (including the loopback
interface route).

Creating a sham link

Step
1. Enter system view.
2. Enter OSPF view.
3. Set the external route tag for
imported VPN routes.
Command
system-view
interface loopback
interface-number
ip binding vpn-instance
vpn-instance-name
ip address ip-address
{ mask-length | mask }
Command
system-view
bgp as-number [ instance
instance-name ]
ip vpn-instance
vpn-instance-name
address-family ipv4 [ unicast ]
import-route direct
Command
system-view
ospf [ process-id | router-id
router-id | vpn-instance
vpn-instance-name ] *
route-tag tag-value
216
Remarks
N/A
By default, no loopback interfaces
exist.
By default, the interface is
associated with no VPN instance.
By default, no IP address is
configured for the loopback
interface.
Remarks
N/A
N/A
N/A
N/A
By default, no direct routes
are redistributed into BGP.
Remarks
N/A
As a best practice, specify a router
ID.
By default, if BGP runs within an
MPLS backbone, and the BGP AS
number is not greater than 65535,
the first two octets of the external
route tag are 0xD000 and the last
two octets are the local BGP AS
number. If the AS number is
greater than 65535, the external
route tag is 0.