H3C Technologies H3C SR8800 - Manual (Page 139)

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Total Nets: 2
Intra Area: 2 Inter Area: 0 ASE: 0 NSSA: 0
NOTE:
Since Area 0 has no direct connection to Area 2, the OSPF routing table of Router A has no route to Area
2.
3. Configure a virtual link:
# Configure Router A.
[RouterA] ospf
[RouterA-ospf-1] area 1
[RouterA-ospf-1-area-0.0.0.1] vlink-peer 2.2.2.2
[RouterA-ospf-1-area-0.0.0.1] quit
[RouterA-ospf-1] quit
# Configure Router B.
[RouterB] ospf
[RouterB-ospf-1] area 1
[RouterB-ospf-1-area-0.0.0.1] vlink-peer 1.1.1.1
[RouterB-ospf-1-area-0.0.0.1] quit
# Display OSPF routing information on Router A.
[RouterA] display ospf routing
OSPF Process 1 with Router ID 1.1.1.1
Routing Tables
Routing for Network
Destination Cost Type NextHop AdvRouter Area
172.16.0.0/16 1563 Inter 192.168.1.2 2.2.2.2 0.0.0.0
10.0.0.0/8 1 Stub 10.1.1.1 1.1.1.1 0.0.0.0
192.168.1.0/24 1562 Stub 192.168.1.1 1.1.1.1 0.0.0.1
Total Nets: 3
Intra Area: 2 Inter Area: 1 ASE: 0 NSSA: 0
Router A has learned the route 172.16.0.0/16 to Area 2.
Configuring OSPF Graceful Restart
Network requirements
As shown in Figure 45 :
• Router A, Router B and Router C that belong to the same autonomous system and the same OSPF
routing domain are GR capable.
• Router A acts as the non IETF standard GR restarter, Router B and Router C are the GR helpers and
re-synchronize their LSDB with Router A through OOB communication of GR.