Network slowness in Particular vlan for particular remote application

Unanswered Question
Jun 25th, 2010
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We have more than 40 vlans in our switch. Users are connectes in access switch.

In Particular vlan (eg : 45) they are accessing some servers/application hosted in US. they are facing slownees in particularaly that time. If they accessing india servers and other servers .. it's all fine.

Even other teams are accessing other server which hosted US in same datacenter they dont find any issues. Pls help to fix it..

How can check whether problem in my side.. what i need to check.. and where ..


Bangalore ------>(Domestic MPLS) Mumbai ---------> US MPLS(MPLS)

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sanjeevreddyallala Fri, 06/25/2010 - 07:28
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Hi Sarvan,

1. did you check load on your Bangalore router & remote end router WAN interface?

(as you mentioned Bloore users accessing remote applications hosted in US datacenter)

2. if load is fine, then you need to check QoS settings, policing BW for that class(COS3 or COS4) and drops for that class



ROGER FERNANDO ... Fri, 06/25/2010 - 14:51
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Hi Sarvan,

I think you consider the following:

  1. If your switch manage NETFLOW analize the application and conversations between both ends, looking for application with hig vulnerabilites.
  2. locate in the same vlan of the users with problems and make a measure of delay between both ends.
  3. make a trace route to find which path has a high delay.

Waiting the result of your test.


Roger Majo


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