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• 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
[SwitchB] ospf 100
[SwitchB-ospf-100] area 0
[SwitchB-ospf-100-area-0.0.0.0] network 192.1.1.0 0.0.0.255
[SwitchB-ospf-100-area-0.0.0.0] quit
[SwitchB-ospf-1] quit
# Configure Switch C.
<SwitchC> system-view
[SwitchC] router id 3.3.3.3
[SwitchC] ospf 100
[SwitchC-ospf-100] area 0
[SwitchC-ospf-100-area-0.0.0.0] network 192.1.1.0 0.0.0.255
[SwitchC-ospf-100-area-0.0.0.0] quit
[SwitchC-ospf-1] quit
3. Configure OSPF GR:
# Configure Switch A as the non-IETF OSPF GR restarter: enable the link-local signaling
capability, the out-of-band re-synchronization capability, and non-IETF GR capability for OSPF
process 100.
[SwitchA-ospf-100] enable link-local-signaling
[SwitchA-ospf-100] enable out-of-band-resynchronization
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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