Alcatel Carrier Internetworking Solutions 6800 User Manual
Troubleshooting IP Routing
OSPF Troubleshooting
OmniSwitch Troubleshooting Guide
September 2005
page 12-21
External LSDB Limit = 0,
Exit Overflow Interval = 0,
# of SPF calculations done = 0,
# of Incr SPF calculations done = 0,
# of Init State Nbrs = 0,
# of Exchange State Nbrs = 0,
# of Full State Nbrs = 0,
# of attached areas = 0,
# of Active areas = 0,
# of Transit areas = 0,
# of attached NSSAs = 0
Exit Overflow Interval = 0,
# of SPF calculations done = 0,
# of Incr SPF calculations done = 0,
# of Init State Nbrs = 0,
# of Exchange State Nbrs = 0,
# of Full State Nbrs = 0,
# of attached areas = 0,
# of Active areas = 0,
# of Transit areas = 0,
# of attached NSSAs = 0
Since, OSPF is enabled globally so enable OSPF on the interface.
-> ip ospf interface 10.40.110.2 status enable
Verify the neighbor relationship between the two routers using the show ip ospf neighbor CLI command.
-> show ip ospf neighbor
IP Address Area Id Router Id Vlan State Mode
----------------+----------------+----------------+----+-------+--------
10.40.110.3 0.0.0.5 192.168.50.3 110 Full Master
IP Address Area Id Router Id Vlan State Mode
----------------+----------------+----------------+----+-------+--------
10.40.110.3 0.0.0.5 192.168.50.3 110 Full Master
The neighbor relationship is full. Neighbor relationship can be one of the following six states:
Init
Initialization State
2way
The two routers are able to receive hello packets from each other. This
will also be the state when neighbor adjacency is formed with a router
other than DR and BDR
will also be the state when neighbor adjacency is formed with a router
other than DR and BDR
Exstart
Starting the synchronization process
Exchange
Exchanging the database
Load
Performing SPF calculations and loading routes in route table
Full
Neighbors are completely synchronized
To view the DR and BDR for this interface, the following command can be used:
-> show ip ospf interface
IP DR Backup DR Admin Oper
Address Address Address Vlan Status Status State
----------------+----------------+----------------+----+--------+------+-------
10.40.110.2 10.40.110.3 10.40.110.2
110 enabled up BDR
So, the above command shows that 10.40.110.3 is the Designated Router and 10.40.110.2 is the Backup
Designated Router. So, if there were two more routers in this subnet then they should form full adjacency
with these routers but between themselves they will have 2way relationship. As, all the routes are to be
synchronized by the DR and the BDR.
Designated Router. So, if there were two more routers in this subnet then they should form full adjacency
with these routers but between themselves they will have 2way relationship. As, all the routes are to be
synchronized by the DR and the BDR.
To look at the Link State Database use the show ip ospf lsdb CLI command:
-> show ip ospf lsdb
Area Id Type LS Id Orig Router-Id SeqNo Age
----------------+-------+----------------+----------------+------------+-----
0.0.0.0 rtr 192.168.50.4 192.168.50.4 0x80000002 10
Area Id Type LS Id Orig Router-Id SeqNo Age
----------------+-------+----------------+----------------+------------+-----
0.0.0.0 rtr 192.168.50.4 192.168.50.4 0x80000002 10