Lenovo ThinkSystem NE2552E, Инструкция по применению

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© Copyright Lenovo 2018 Chapter 28: OSPF
407
Example 2: Virtual Links
In the example shown in Figure 46 , area 2 is not physically connected to the
backbone as is usually required. Instead, area 2 will be connected to the backbone
via a virtual link through area 1. The virtual link must be configured at each
endpoint.
Figure 46.
Configuring a Virtual Link
Note:
OSPFv2 supports IPv4 only. IPv6 is supported in OSPFv3 (see “OSPFv3
Implementation in Lenovo ENOS” on page 413 ).
Configuring OSPF for a Virtual Link on Switch #1
1.
Configure IP interfaces on each network that will be attached to the switch.
In this example, two IP interfaces are needed:
 Interface 1 for the backbone network on 10.10.7.0/24
 Interface 2 for the transit area network on 10.10.12.0/24
2.
Configure the router ID.
A router ID is required when configuring virtual links. Later, when configuring the
other end of the virtual link on Switch 2, the router ID specified here will be used as
the target virtual neighbor (
nbr
) address.
3.
Enable OSPF.
4.
Define the backbone.
BladeCenter
IF 1
10.10.7.1
IF 2
10.10.12.1
IF 1
10.10.12.2
IF 1
10.10.24.1
Backbone Transit Area Stub Area
Application
Switch 1 Switch 2
Area 0
(0.0.0.0)
Area 1
(0.0.0.1)
Area 2
(0.0.0.2)
Virtual Link 1
10.10.12.0/24
Network
10.10.7.0/24
Network
10.10.24.0/24
Network
Router ID:
10.10.10.1
Router ID:
10.10.14.1
NE2552E(config)# interface ip 1
NE2552E(config-ip-if)# ip address 10.10.7.1 255.255.255.0 enable
NE2552E(config-ip-if)# exit
NE2552E(config)# interface ip 2
NE2552E(config-ip-if)# ip address 10.10.12.1 255.255.255.0 enable
NE2552E(config-ip-if)# exit
NE2552E(config)# ip router-id 10.10.10.1
NE2552E(config)# router ospf
NE2552E(config-router-ospf)# enable
NE2552E(config-router-ospf)# area 0 area-id 0.0.0.0
NE2552E(config-router-ospf)# area 0 type transit
NE2552E(config-router-ospf)# area 0 enable