R3303-HP HSR6800 Routers MPLS Configuration Guide
291
Ste
p
Command
1. Enter system view.
system-view
2. Enter BGP view.
bgp as-number
3. Enter BGP VPN instance view.
ipv4-family vpn-instance vpn-instance-name
4. Redistribute direct routes into BGP (to redistribute
the loopback interface route into BGP).
import-route direct [ med med-value | route-policy
route-policy-name ] *
5. Redistribute OSPF VPN routes.
import-route ospf [ { process-id | all-processes }
[ allow-direct | med med-value | route-policy
route-policy-name ] * ]
Creating a sham link
Follow these guidelines when you create a sham link:
• If you start OSPF but do not configure the router ID, the system automatically elects one. However,
the same election rules produce the same router ID. Therefore, HP recommends that you configure
the router ID when starting an OSPF process. For the election rules, see Layer 3—IP Routing
Configuration Guide.
• If you configure multiple OSPF VPN instances but do not configure the route tag, the system
automatically creates one based on the AS number configured. If you do not configure BGP, the tag
will be 0. However, the same calculation rule produces the same tag, and hence the same tag is
created for multiple OSPF VPN instances on the same PE or PEs with the same AS number. Therefore,
HP recommends that you configure different tags for different OSPF VPN instances.
• Modifying MD5/HMAC-MD5 keys support MD5 smooth rollovers. For more information, see Layer
3—IP Routing Configuration Guide.
To create a sham link:
Ste
p
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 ] *
N/A
3. Configure the external route
tag for imported VPN routes.
route-tag tag-value N/A
4. Enter OSPF area view.
area area-id N/A
5. Configure a sham link.
sham-link source-ip-address
destination-ip-address [ cost cost |
dead dead-interval | hello
hello-interval | retransmit
retrans-interval | trans-delay delay
| { simple [ cipher | plain ]
password | { md5 | hmac-md5 }
key-id [ cipher | plain ]
password } ]*
By default, no sham link is
configured.