3Com S7906E Configuration Manual page 1544

To do...
Configure the type codes of
OSPF extended community
attributes
Perform the configurations on PEs. Only conventional OSPF is required on CEs.
Deleting a VPN instance will delete all related OSPF processes at the same time.
An OSPF process can be configured with only one domain ID. Domain IDs of different OSPF processes
are independent of each other.
All OSPF processes of a VPN must be configured with the same domain ID for routes to be correctly
advertised, while OSPF processes on PEs in different VPNs can be configured with domain IDs as
desired.
The domain ID of an OSPF process is included in the routes generated by the process. When an OSPF
route is injected into BGP, the OSPF domain ID is included in the BGP VPN route and delivered as a
BGP extended community attribute.
After configuring an OSPF instance, you must start OSPF by using the same method for starting a
common OSPF process.
For description and detailed configuration about OSPF, refer to OSPF Configuration in the IP
Routing Volume.
Configuring IS-IS between PE and CE
An IS-IS process belongs to only one VPN instance. If you run a IS-IS process without binding it to a
VPN instance, the process is considered a public network process.
Follow these steps to configure IS-IS between PE and CE:
To do...
Enter system view
Create an IS-IS instance
between PE and CE and enter
IS-IS view
Use the command...
ext-community-type
{ domain-id type-code1 |
router-id type-code2 |
route-type type-code3 }
Use the command...
system-view
isis [ process-id ]
vpn-instance
vpn-instance-name
1-29
Remarks
Optional
The defaults are as follows:
0x0005 for Domain ID,
0x0107 for Router ID, and
0x0306 for Route Type.
Configure this command on a
PE.
Remarks
—
Required