Switch User Manual

IP routing 31

Creating Host Route

Example : 1

R3(config)#router ospf

R3(config-router)#host-route 11.11.11.111 metric 10

R3(config-router)#show ip ospf host-route

Host IP Metric

11.11.11.111 10

R3(config-router)#

The following is an example for deleting a host route:

Deleting Host Route

Example : 1

R3(config-router)#no host-route 11.11.11.111

R3(config-router)#show ip ospf host-route

Host IP Metric

R3(config-router)#

OSPF virtual link

On an OSPF network, a router acting as an area boundary router (ABR)

must be directly connected to the backbone. If no physical connection is

available, you can create a virtual link.

A virtual link is established between two endpoint ABRs and is a logical

connection to the backbone area through a non-backbone area called a

transit area. In the following diagram, non-backbone ABR 2 establishes a

virtual link with backbone ABR1 across transition area, area 1. The virtual

link connects area 2 to area 0.

Nortel Ethernet Routing Switch 5500 Series

Conﬁguration-IP Routing Protocols

NN47200-503 03.01 Standard

5.1 27 August 2007