OSPF workaround: Using GRE tunnel as the back up ospf link

The link of subnet 172.16.10.4/30 is fixed, a backup physical link between 2651-1 and 2651-2 is proposed as backup link for area 0. As of current to prevent Area 2 from becoming discontiguous should the link of 172.16.10.4/30 is broken, GRE tunnel between 2651-1 and 2651-3 should be intact until a physical link is connected … Continue reading OSPF workaround: Using GRE tunnel as the back up ospf link

OSPF – Discontiguous Area

OSPF routing has been configured as shown in the network diagram. A link at 172.16.10.4/30 is broken. There's no backup link for area 0 between 2651-1 and 2651-2, hence area 2 becomes discontiguous. Before link breakage 1841-1#sh ip route ospf 2.0.0.0/32 is subnetted, 1 subnets O       2.2.2.2 [110/2] via 172.16.10.2, 00:39:23, FastEthernet0/0 3.0.0.0/32 is subnetted, … Continue reading OSPF – Discontiguous Area