I've had the following problem with a customer of ours and I'd like to know if there's any tools I can use in the future to better diagnose the problem if it may arise again.
The customer is a bank with hundreds of brnach sites. All of them are connected to the corporate via a MPLS network managed by a local TELCO company .
In the last ten days they have experienced long delays during logons of users in the branch sites . This delay has been initially thought due to new operating systems deployed on the clients ( XP ) . In fact there's a rollout of XP computers at all the branch sites .
Trying to troubleshoot the problem we have started looking at all OS related known problems but found nothing important.
Next I tried looking at the network connections with the few tools I have ( basically ping , traceroute and protocol analyzer ) but all seemed ok .
Having no access to the telco routers I monitored the corporate's switch ports to which the two telco router are attched .
Finally I found some packet discarded and could call the telco and having the routers checked.
They found a problem , they didn't told us what it was , and suddendly most of the problems were gone.
This was really tricky because a part from the slow logon we had no other mulfunctions . I found the problem thanks to a Microsoft tool to check group policy problem which point me to possible networks problem.
The question , after this long post , is ; is there any tool, agent , software I can install or use to check MPLS network efficiency having no access to the TELCO routers ?
The slow connectivity issue may be due to several reasons. Even if there is a problem with the physical link there can be connectivity issues. Check if you are getting any errors on the interfaces of the router at the premises. Check if the errors are increasing. The command to check this is "sh interface ".
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