123
Topology base (MTID 0)
Routing for network
Destination Cost Type NextHop AdvRouter Area
10.2.1.0/24 2 Transit 10.2.1.1 3.3.3.3 0.0.0.1
10.3.1.0/24 5 Inter 10.2.1.2 3.3.3.3 0.0.0.0
10.1.1.0/24 2 Transit 10.1.1.2 2.2.2.2 0.0.0.0
Total nets: 3
Intra area: 2 Inter area: 1 ASE: 0 NSSA: 0
The output shows that Switch B has learned the route 10.3.1.0/24 to Area 2.
OSPF GR configuration example
Network requirements
As shown in Figure 31:
Switch A, Switch B, and Switch C that belong to the same AS and the same OSPF routing
domain are GR capable.
Switch A acts as the non-IETF GR restarter. Switch B and Switch C are the GR helpers, and
synchronize their LSDBs with Switch A through OOB communication of GR.
Figure 31 Network diagram
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Enable OSPF:
# Configure Switch A.
SwitchA> system-view
[SwitchA] router id 1.1.1.1
[SwitchA] ospf 100
[SwitchA-ospf-100] area 0
[SwitchA-ospf-100-area-0.0.0.0] network 192.1.1.0 0.0.0.255
[SwitchA-ospf-100-area-0.0.0.0] quit
[SwitchA-ospf-1] quit
# Configure Switch B.
<SwitchB> system-view
[SwitchB] router id 2.2.2.2
Vlan-int100
192.1.1.1/24
Vlan-int100
192.1.1.3/24
Vlan-int100
192.1.1.2/24
GR helper GR helper
GR restarter
Switch A
Switch CSwitch B
Router ID: 1.1.1.1
Router ID: 2.2.2.2
Router ID: 3.3.3.3
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