Huawei Quidway S3500 Series Operation Manual page 215

Operation Manual - Routing Protocol
Quidway S3500 Series Ethernet Switches
In Switch A, execute display ospf peer to show its OSPF neighbors. Please note the
priority of Switch B has been modified to 200, but it is still not the DR.
Only when the current DR is offline, will the DR be changed. Shut down Switch A, and
run display ospf peer command on Switch D to display its neighbors. Please note the
original BDR (Switch C) becomes the DR, and Switch B is BDR now.
If all Ethernet Switches on the network are removed and added back again, Switch B
will be elected as the DR (with the priority of 200), and Switch A becomes the BDR (with
a priority of 100). To switch off and restart all of the switches will bring about a new
round of DR/BDR selection.
4.4.2 Configuring OSPF Virtual Link
I. Networking requirements
In the following figure, Area 2 and Area 0 are not directly connected. Area 1 is required
to be taken as transit area for connecting Area 2 and Area 0. Correctly configure a
virtual link between Switch B and Switch C in Area 1.
II. Networking diagram
Area 1
Figure 4-3 OSPF virtual link configuration networking
III. Configuration procedure
# Configure Switch A:
[Switch A] interface Vlan-interface 1
[Switch A-Vlan-interface1] ip address 196.1.1.1 255.255.255.0
[Switch A] router id 1.1.1.1
[Switch A] ospf
[Switch A-ospf] area 0
Switch A
1.1.1.1
Area 0
196.1.1.1/24
196.1.1.2/24
Switch B
2.2.2.2
Virtual
Link
Switch C
3.3.3.3
Huawei Technologies Proprietary
197.1.1.2/24
197.1.1.1/24
152.1.1.1/24
Area 2
4-27
Chapter 4 OSPF Configuration