3Com S7906E Configuration Manual page 701

[SwitchB] display ospf routing
OSPF Process 1 with Router ID 2.2.2.2
Routing for Network
Destination
10.2.1.0/24
10.3.1.0/24
10.1.1.0/24
Total Nets: 3
Intra Area: 2
Switch B has learned the route 10.3.1.0/24 to Area 2.
Configuring OSPF Graceful Restart
Network requirements
As shown in the following figure:
Switch A, Switch B and Switch C that belong to the same autonomous system and the same OSPF
routing domain are GR capable.
Switch A acts as the non IETF standard GR Restarter whereas Switch B and Switch C are the GR
Helpers and re-synchronize their LSDB with Switch A through OOB communication of GR.
Figure 1-28 Network diagram for OSPF GR configuration
Vlan-int100
192.1.1.2/24
Switch B
GR helper
Router ID: 2.2.2.2
Configuration procedure
1) Configure IP addresses for interfaces (omitted)
2) Configure OSPF GR
# Configure Switch A
<SwitchA> system-view
[SwitchA] router id 1.1.1.1
[SwitchA] ospf 100
[SwitchA-ospf-100] enable link-local-signaling
[SwitchA-ospf-100] enable out-of-band-resynchronization
[SwitchA-ospf-100] graceful-restart
Routing Tables
Cost Type
2 Transit 10.2.1.1
5 Inter
2 Transit 10.1.1.2
Inter Area: 1 ASE: 0
Router ID: 1.1.1.1
GR restarter
Switch A
Vlan-int100
192.1.1.1/24
Vlan-int100
192.1.1.3/24
Switch C
GR helper
Router ID: 3.3.3.3
NextHop AdvRouter
3.3.3.3
10.2.1.2 3.3.3.3
2.2.2.2
NSSA: 0
1-68
Area
0.0.0.1
0.0.0.0
0.0.0.0