Command Reference Guide

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3Com Router 3000 Ethernet Family

Command Reference Guide

Chapter 2 BGP/MPLS VPN Configuration

Commands

3Com Corporation

2-15

If you enable an OSPF process without specify router ID, and the process is to be

bound to a VPN instance, the VPN instance should have an interface that is configured

with an IP address.

If you want to bind a process to a VPN instance, you must specify the VPN instance

name.

One VPN instance may include several processes. For example, for VPN instance 1 to

configure the commands ospf 1 vpn-instance vpn1, ospf 2 vpn-instance vpn1, and

ospf 3 vpn-instance vpn1. Accordingly, VPN instance 1 will include processes 1, 2,

and 3.

One process belongs to one instance only however. If you have configured ospf 1

vpn-instance vpn1, you cannot configure ospf 1 vpn-instance vpn2. Otherwise, the

system prompts: “Wrong configuration. Process 1 has been bound to vpn-instance

vpn-instance 1”. If you configure ospf 1 first and then ospf 1 vpn-instance vpn1, the

system prompts: “Wrong configuration. Process 1 has been running in public domain”.

If you configure ospf 1 vpn-instance vpn1 first and then ospf 1, the system enters

ospf 1 vpn-instance vpn1 mode. That is, the commands ospf 1 and ospf 1

vpn-instance vpn1 are equivalent.

When an OSPF process is bound to a VPN instance, the default OSPF router is PE

router. After executing the display ospf process-id brief command, you will view the

information: “PE router, connected to VPN backbone”.

Caution:

z A router can run no more than 1024 OSPF processes, with up to 10 processes

enabled in each VPN instance.

z If you bind an OSPF process to a nonexistent VPN instance, the configuration for

the command fails. The system prompts: “Specified vpn instance not configured”.

z When a VPN instance is deleted, all the related OSPF processes will be deleted.

For example, VPN instance vpn1 includes OSPF processes 1, 2 and 3. If VPN

instance vpn1 is deleted, the OSPF processes 1, 2 and 3 will all be deleted at the

same time.

Related command: network.

Example

# Enable OSPF protocol with default process ID.

[3Com ] router id 10.110.1.8

[3Com ] ospf