Network Requirements - 3Com Switch 4800G 24-Port Configuration Manual

322 C 28: OSPF C
HAPTER
OSPF Graceful Restart
Configuration Example
ONFIGURATION
[SwitchA] display ospf routing
OSPF Process 1 with Router ID 1.1.1.1
Routing for Network
Destination
172.16.1.1/16
10.0.0.0/8
192.168.1.0/24
Total Nets: 3
Intra Area: 2
Switch A has learned the route 172.16.1.1/16 to Area 2.

Network requirements

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 remain OOB synchronized with Switch A
through the GR mechanism.
Network diagram
Figure 98 Network diagram for OSPF-based GR configuration
Router ID: 1.1.1.1
Vlan- int100
192.1.1.2 /24
Switch B
GR helper
Router ID: 2.2.2.2
Configuration procedure
1 Configure Switch A
<SwitchA> system-view
[SwitchA] interface vlan-interface 100
[SwitchA-Vlan-interface100] ip address 192.1.1.1 255.255.255.0
[SwitchA-Vlan-interface100] quit
[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
[RouterA-ospf-100] graceful-restart
[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] return
2 Configure Switch B
Routing Tables
Cost Type NextHop
1563 Inter 192.168.1.2
1 Stub 10.1.1.1
1562 Stub 192.168.1.1
Inter Area: 1 ASE: 0
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
AdvRouter
2.2.2.2
1.1.1.1
1.1.1.1
NSSA: 0
Area
0.0.0.0
0.0.0.0
0.0.0.1