Re: T1 Routing issue

kharris · ‎01-25-2005

I have two routers connected via a Channelized T1. Cahnnels 1-9 are for voices, and 10-24 are for data.

The real problems is that a directly attached switch to one of the routers will not send traffice out the router. It is going out a fiber connection to another switch, to a 3rd router before going across the wan. This fiber line is supposed to be disconnected, and was never intended for use.

Where should I look first to see why traffic from a directly attached switch won't go out the router. The T1 is active and working to the best of my knowledge (voice is working fine over it).

The router is a 2621 and the switch is a 2950. I can reply with more detail if someone can guide me. I have basic IOS knowledge, but I have inherited this problem.

rlcarr · ‎01-26-2005

Sounds like you need to change the default gateway on your switch.

Richard Burts · ‎01-26-2005

If the question was about traffic from the switch management interface, then the response is correct that you need to change the default gateway on the switch. However if the question is about traffic from devices connected to switch ports, then the answer is to look at how the switch is configured (what VLANs), which routers have VLAN interfaces configured, and most especially what default gateway is configured on the end stations connected to the switch.

HTH

Rick

HTH

Rick

kharris · ‎01-26-2005

Thanks for the responses. It ends up, we solved the problem just this morning. It was a routing metric involved with two other connected routers using OSPF. I believe OSPF gave a higher default metric to the T1 on the remote end becuase it was only using some of the channles...not a full T1. (I could be wrong...a guess). Basically, traffic was choosing the lower metric path trhough another router, over frame-relay, in the "router triangle". Additionally, the default getway on the local side was configured to go out another router via fiber on the switch anyway. So even when the fiber was removed, traffic didn't know where to go.

Regardless, it's been solved. I appreciate the input. Thank you.

Kyle