Ospf routes timer get reset

[Sanjay Shaw]

Hi Mates,

Bit confussed for some of the routes get the timer period changed . show ip ospf output provided below:

WANEDGE-#sh ip route 10.107.4.245  ………………….. 

Routing entry for 10.107.0.0/16

  Known via "ospf 300", distance 110, metric 1, type extern 2, forward metric 1

  Last update from 10.120.105.34 on GigabitEthernet1/0/11, 1d00h ago

  Routing Descriptor Blocks:

  * 10.120.106.230, from 10.130.240.62, 1d00h ago, via GigabitEthernet1/0/12

      Route metric is 1, traffic share count is 1

    10.120.105.34, from 10.130.240.62, 1d00h ago, via GigabitEthernet1/0/11

      Route metric is 1, traffic share count is 1

**************************

WANEDGE-#sh ip route 10.136.118.0  ……………….

Routing entry for 10.136.118.0/24

  Known via "ospf 300", distance 110, metric 1

  Tag 65527, type extern 2, forward metric 1

  Last update from 10.120.105.34 on GigabitEthernet1/0/11, 1d00h ago

  Routing Descriptor Blocks:

  * 10.120.106.230, from 10.130.240.62, 1d00h ago, via GigabitEthernet1/0/12

      Route metric is 1, traffic share count is 1

      Route tag 65527

    10.120.105.34, from 10.130.240.62, 1d00h ago, via GigabitEthernet1/0/11

      Route metric is 1, traffic share count is 1

      Route tag 65527

Does it mean that the Ospf routes has been got flushed for the mention destinaion network. Need a small help for my understanding and what may be reason to get those timer value reset again.

[John Blakley]

The route time that you're seeing is how long the route has been valid in the table. If it's dropping from say, 20 days to 1 day, then the route is dropping out of the table somehow. You can go to the router in question and do a 'show ip ospf neighbor

' to see how long the neighbors have been up to verify which neighbor it's having a problem with.

Neighbor 10.124.0.12, interface address 10.124.0.12

    In the area 4 via interface FastEthernet0/1

    Neighbor priority is 1, State is FULL, 6 state changes

    DR is 10.124.0.4 BDR is 10.124.0.12

    Options is 0x52

    LLS Options is 0x1 (LR)

    Dead timer due in 00:00:36

    Neighbor is up for 23:40:49

    Index 1/2, retransmission queue length 0, number of retransmission 4

    First 0x0(0)/0x0(0) Next 0x0(0)/0x0(0)

    Last retransmission scan length is 1, maximum is 1

    Last retransmission scan time is 0 msec, maximum is 4 msec

[Sanjay Shaw]

Hi J,

Am too much thankful for the provided clarification.

regards// Sanjay