Specifications

Chapter 5. IBM System Networking RackSwitch implementation 205
AGG-2(config-ip-loopback)#ip address 1.1.1.2 255.255.255.255
AGG-2(config-ip-loopback)#ip router-id 1.1.1.2
AGG-2(config)#^Z
AGG-2#
ACC-1#configure terminal
Enter configuration commands, one per line. End with Ctrl/Z.
ACC-1(config)#interface loopback 1
ACC-1(config-ip-loopback)#ip address 2.2.2.1 255.255.255.255
ACC-1(config-ip-loopback)#ip router-id 2.2.2.1
ACC-1(config)#^Z
ACC-1#
ACC-2#configure terminal
Enter configuration commands, one per line. End with Ctrl/Z.
ACC-2(config)#interface loopback 1
ACC-2(config-ip-loopback)#ip address 2.2.2.2 255.255.255.255
ACC-2(config-ip-loopback)#ip router-id 2.2.2.2
ACC-2(config-ip-loopback)#^Z
ACC-2#
2. Enable OSPF.
Run router ospf to enter the protocol configuration mode and enable to activate it, as
shown in Example 5-48.
Example 5-48 OSPF activation
ACC-1#configure terminal
Enter configuration commands, one per line. End with Ctrl/Z.
ACC-1(config)#router ospf
ACC-1(config-router-ospf)#enable
ACC-1(config-router-ospf)#^Z
ACC-1#
3. Define areas.
If you are configuring multiple areas in your OSPF domain, one of the areas must be
designated as area 0, known as the
backbone. The backbone is the central OSPF area
and is physically connected to all other areas. The areas inject routing information into the
backbone, which in turn disseminates the information into other areas.
We use only area 0 (backbone) in our example.
Up to six OSPF areas can be connected to the switch with IBM Networking OS. To
configure an area, the OSPF number must be defined and then attached to a network
interface on the switch. The full process is explained in the following sections.
An OSPF area is defined by assigning two pieces of information: an a
rea index and an
area ID. The commands to define and enable an OSPF area are:
– area <area index> area-id <n.n.n.n>
– area <area index> enable
Important: This operation is performed for all four Layer 3 switches (AGG-1, AGG-2,
ACC-1, and ACC-2)