Nortel Alteon OS 42C4911 Application Manual page 209

Configuring OSPF for a Virtual Link on Switch #2
1. Configure IP interfaces on each network that will be attached to OSPF areas.
Two IP interfaces are needed on Switch #2: one for the transit area network on 10.10.12.0/24
and one for the stub area network on 10.10.24.0/24.
>> # /cfg/l3/if 1
>> IP Interface 1 # addr 10.10.12.2
>> IP Interface 1 # mask 255.255.255.0
>> IP Interface 1 # enable
>> IP Interface 1 # ../if 2
>> IP Interface 2 # addr 10.10.24.1
>> IP Interface 2 # mask 255.255.255.0
>> IP Interface 2 # enable
2. Configure the router ID.
A router ID is required when configuring virtual links. This router ID should be the same one
specified as the target virtual neighbor (nbr) on switch 1 in
>> IP Interface 2 # /cfg/l3/rtrid 10.10.14.1 (Set static router ID on switch 2)
3. Enable OSPF.
>> IP# /cfg/l3/ospf/on
4. Define the backbone.
This version of Alteon OS requires that a backbone index be configured on the non-backbone
end of the virtual link as follows:
>> Open Shortest Path First # aindex 0
>> OSPF Area (index) 0 # areaid 0.0.0.0
>> OSPF Area (index) 0 # enable
5. Define the transit area.
>> OSPF Area (index) 0 # ../aindex 1
>> OSPF Area (index) 1 # areaid 0.0.0.1
>> OSPF Area (index) 1 # type transit
>> OSPF Area (index) 1 # enable
42C4911, January 2007
Alteon OS Application Guide
(Select menu for IP interface 1)
(Set IP address on transit area net-
work)
(Set IP mask on transit area network)
(Enable IP interface 1)
(Select menu for IP interface 2)
(Set IP address on stub area network)
(Set IP mask on stub area network)
(Enable IP interface 2)
Step 8 on page 208.
(Enable OSPF on switch 2)
(Select the menu for area index 0)
(Set the area ID for OSPF area 0)
(Enable the area)
(Select menu for area index 1)
(Set the area ID for OSPF area 1)
(Define area as transit type)
(Enable the area)
Chapter 12: OSPF 209