Packet droppng need assistance

[rexxxy]

Hi all,
Have a problem with a client site, they have a Cisco 801's(?) and they are having problems with latency, they are connecting over an ISDN connection (128k) and are running over Citrix. Every since the install they have been experiencing intermitent drop outs.

Unfortunaltey our Cisco tech has gone on holidays for the christmas break and I am left to deal with this one. I dont have the first clue of where to start!

Can you guys throw a few suggestions my way in order to help me out? I would relly apreciate any assistance you guys can give.

thanks

 

[trismegistus]

One cause could be the dialer load-threshold, which is the bandwidth on demand feature that brings up the second B channel after traffic reaches a certain level. If the threshold is very high (100+), it can cause the second B channel to drop while traffic is still at a reasonably high rate, leaving packets that are using the B channel at the time to be dropped.

If you are using this system of bandwidth on demand, try adjusting the threshold to 50, but not lower than 20, or problems can be experienced in keeping the second B channel up.

The command is entered at thew dialer interface and is:

dialer load-threshold 50 either.

If this isn't the issue, run: debug q931, debug ppp negotiation, debug ppp authentication and debug dialer commands and replicate the packet dropping by passing a heap of traffic over the link out of hours. If you post it up i'll have a look at the disconnection cause, or you can check yourself with a search for ISDN disconnection codes on google.