routing problem

Answered Question

Hi Netpros,


I have a Catalyst 4510 L3 swtich (192.168.212.1) and are using static routes, I have no default route configured.


My problems is this - i have a directly connected 10.100.100.0 /24 network and I need to add a static route to 10.118.13.0 /24 network via 172.168.8.2 The routing table shows the following :


10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

C 10.100.100.0/24 is directly connected, Vlan10

S 10.118.13.30/32 [1/0] via 172.16.8.1


the static route has been entered as ip route 10.118.13.0 255.255.255.0 172.16.8.1


When I ping from the Catalyst switch to network 10.118.13.0 It works fine, however when I ping from the 10.118.13.0 network to 192.168.212.0 network (Catalyst switch) I get TTL expired messages - its like I have a routing loop and the cause of the problme I think is becuase of the directly connected 10.100.100.0/24 route?????


I could be wrong - any takers on trying to figure this one out with me?


thanks.


rod

Correct Answer by Laurent Aubert about 7 years 12 months ago

Hi Rod,


I don't think there is any relation between VLAN 10 and your issue.


You need to make a hop by hop routing table check starting from the host on 10.118.13.0 subnet:

- You check the routing table to find the outgoing interface to join 192.168.212.1.

- If the nexthop is the expected one, do the same check on the nexthop up to the destination.


This way you should find a wrong entry on a router along the path.


You can also do a traceroute from the host.


HTH


Laurent.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
Loading.
Correct Answer
Laurent Aubert Fri, 07/31/2009 - 06:54
User Badges:
  • Cisco Employee,

Hi Rod,


I don't think there is any relation between VLAN 10 and your issue.


You need to make a hop by hop routing table check starting from the host on 10.118.13.0 subnet:

- You check the routing table to find the outgoing interface to join 192.168.212.1.

- If the nexthop is the expected one, do the same check on the nexthop up to the destination.


This way you should find a wrong entry on a router along the path.


You can also do a traceroute from the host.


HTH


Laurent.

Actions

This Discussion