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Router continually needs to be recycled

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7 replies

by rfriedman

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We have an ISDN line, a router, a VPN Sonic Wall and have been experiencing continued problems with the router. For no apparent reason, the connection to the Internet breaks. I need to recycle the router to the connection started again. This happens usually at least once a day now. We have changed routers twice, have had the telephone company out to check the line and it still is happening. Our ISP says it is not him.

We have a support consulting company working on it but they seems to be frustrated and confused as well. Any ideas?

7 replies

by legj1

Here is one idea. May not be right, but... THe Sonicwall is prob setup to re-negotiate the VPN's every 24 hrs or whatever. Are you losing the router at these times? Usually a Sonicwall can take a few seconds to re-negotiate. This could be throwing the router. You may want to play with the configs and the Security Association settings... Just an idea.

by otl

With the indication you've given the problem is on your end of the circuit. Recycling the router to get the connection back up.

When you replaced the router, did you program it from scratch? Or load the original program into it?

You did not specify the type of ISDN line and bandwidth. An ISDN up to 384K will use a data channel (D-channel) and 1-B channel for each 64K of bandwidth, this means 3 to 7 paths to the channel bank which could be located in the central office. A PRI-ISDN is at aDS1 level thus only 2 paths to the switch.

Check the status of the D-channel in the router when it the connection drops, if it is in DCF (D-channel fail) the data channel can not see the switch. This could be an OCU (office channel unit) or wire / cable problem.

If it is in LO (Lock Out) then the path appears to be fine the problem is the switch on the far end.

If it is busy, then the router has turned off the D-Channel, which should not happen on its own. Program problem in the router.

Good Luck!

by estebandelatorre

Generally speaking, routers may need to be rebooted when:
1.-The CAM is full and the router can not respond in a time, so "WE" think that the router is hanged, but not, he is trying to purge cam records from it's memory. This may be caused by invalid NAT request that the router holds in memory.
2.-The O.S. of the router is an old one or the flash may be corrupted. The solution may be as simply as format the flash and load the OS again.
3.- If it's a VPN, double check if she can renew it's passwords without any problems. Again, if OS are different, you can face this kind of problem.

Good luck

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