3com S7906E Manuel De Montage

 

1-68 

[SwitchB] display ospf routing 

          OSPF Process 1 with Router ID 2.2.2.2 

                   Routing Tables 

 

 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                             

Switch B has learned the route 10.3.1.0/24 to Area 2. 

As shown in the following figure: 

z 

Switch A, Switch B and Switch C that belong to the same autonomous system and the same OSPF 

routing domain are GR capable.  

z 

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
192.1.1.1/24

Vlan-int100

192.1.1.3/24

Vlan-int100
192.1.1.2/24

Switch A

Switch C

Switch B

Router ID: 1.1.1.1

Router ID: 2.2.2.2

Router ID: 3.3.3.3

 

 

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