H3C Technologies H3C S7500E Series Switches - Manual (Page 256)

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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.
z
After configuring an OSPF instance, you must start OSPF by using the same method for starting
a common OSPF process.
z
For description and detailed configuration about OSPF, see OSPF Configuration in the Layer 3 -
IP Routing Configuration Guide .
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… Use the command… Remarks
Enter system view system-view —
Create an IS-IS instance between
PE and CE and enter IS-IS view
isis [ process-id ] vpn-instance
vpn-instance-name
Required
z
After configuring an IS-IS instance, you must start IS-IS by using the same method for starting a
common IS-IS process.
z
For description and detailed configuration about IS-IS, see IS-IS Configuration in the Layer 3 - IP
Routing Configuration Guide .
Configuring EBGP Between PE and CE
1) On a PE
Follow these steps to configure EBGP between PE and CE on a PE:
To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —