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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 Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Create a loopback interface
and enter loopback interface
view.
interface loopback
interface-number
By default, no loopback interface
is created.
3.
Associate the loopback
interface with a VPN
instance.
ip binding vpn-instance
vpn-instance-name
By default, the interface is
associated with no VPN instance.
4.
Configure an IP address for
the loopback interface.
ip address
ip-address
{
mask
|
mask-length
}
By default, no IP address is
configured for the loopback
interface.
Redistributing the loopback interface address
Step Command Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP view.
bgp
as-number
N/A
3.
Enter BGP-VPN instance
view.
ip vpn-instance
vpn-instance-name
N/A
4.
Enter BGP-VPN IPv4
unicast address family
view.
address-family ipv4
[
unicast
]
N/A
5.
Redistribute direct routes
into BGP (including the
loopback interface
route).
import-route direct
By default, no direct routes are
redistributed into BGP.
Creating a sham link
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter OSPF view.
ospf
[
process-id
|
router-id
router-id
|
vpn-instance
vpn-instance-name
] *
As a best practice, specify a router
ID.
3.
Configure the external route
tag for imported VPN routes.
route-tag
tag-value
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.
Summary of Contents for HPE FlexNetwork MSR Router Series
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