Router hangs/Network chokes

[kumar.law]

Hi,

My internet connection goes down 4 to 5 times daily. While Local network works fine, none of the user in my network is able to access internet. The problem only gets resolved after rebooting the Router.

We are having 3 MBPS of lease line connected to Ethernet interface of Cisco 1845 router.

The network is like

ISP-->Router-->Firewall-->Switch-->50 VLANs

Please help me find the problem.

Thanks & Regards,

Law Kumar

[ohassairi]

when internet hangs:

-are you able to telnet to your rtr?

-if yes make a sho ip interf brief and check if your interfaces are up or down.

you can also install a syslog server and let your rtr send syslog messages to this server.

[kumar.law]

No, I am not able to telnet to my router.

[kwillacey]

You know I had a problem similar to that recently, what IOS are you running? I did an upgrade and it fixed the problem.

[kumar.law]

The IOS ver of my router is 12.4

Do I need to upgrade it to recent one.

[kwillacey]

I was running 124-15.T5 advanced ip services and an upgrade to 124-20.T fixed the problem.