[j-nsp] ex4200 throughput trouble on 10GE interface

[Alex]

Michael,
Looks like ex4200 might send PAUSE frames to your uplink which could limit traffic. Try to disable flow-control on both sides and use traffic generator to test. If you don't have a 10G traffic generator but have a couple of 10G ports on T-series/MX then cascaded port-mirroring could produce you a 10G packet stream.
Rgds
Alex
  ----- Original Message ----- 
  From: Michael 
  To: Alex 
  Cc: juniper-nsp at puck.nether.net 
  Sent: Tuesday, August 04, 2009 8:32 PM
  Subject: Re: [j-nsp] ex4200 throughput trouble on 10GE interface





  2009/8/4 Alex <alex.arseniev at gmail.com>

    Michael,
    Is the throughput impaired only during peak times? Does throughput improve after peak hours?
  Traffic goes down in offpeak time to 1G. Difference between inbound and outbound traffic cannot be seen. The next day peak time the situation repeats - outbound traffic reaches a limit and does not go upper. Reboot resolves the situation.
    Are there any drops/errors on this interface?
   On both sides there are no errors and drops. I check them by "show interfaces xe-0/1/0 extensive" command.

    Is uplink sending you (perhaps too many) PAUSE frames?
  Uplink is connected to catalyst 6500:
  c6500-BGW-XL#sh int te3/6 | i flow
    input flow-control is on, output flow-control is off
  So as I see uplink shouldn't send pause frames.
  On ex4200:
  > show interfaces xe-0/1/0 | match Flow
    Source filtering: Disabled, Flow control: Enabled
  May be I should try to disable flow control on juniper interface?

    Rgds
    Alex

    ----- Original Message ----- From: "Michael" <mschedrin at gmail.com>
    To: <juniper-nsp at puck.nether.net>
    Sent: Tuesday, August 04, 2009 5:47 PM
    Subject: [j-nsp] ex4200 throughput trouble on 10GE interface



      Hi all,
      Recentle I've installed first ex4200 to my core network with 10GE uplink
      module. Now almost every day in peak time I see sudden fall of throughput on
      10GE interface. Peak load is about 4G. At the moment outbound traffic falls
      to 3G and users notice upload speed downgrade. The only method I found to
      resolve the problem - reboot the switch. Nothing unusual is configured on
      switch, no QoS also. I've no idea how to troubleshoot the problem?May be you
      can point me to some worthful troubleshooting guides?

      _______________________________________________
      juniper-nsp mailing list juniper-nsp at puck.nether.net
      https://puck.nether.net/mailman/listinfo/juniper-nsp






  2009/8/4 Alex <alex.arseniev at gmail.com>

    Michael,
    Is the throughput impaired only during peak times? Does throughput improve after peak hours? 
  Traffic goes down in offpeak time to 1G. Difference between inbound and outbound traffic cannot be seen. The next day peak time the situation repeats - outbound traffic reaches a limit and does not go upper. Reboot resolves the situation.
    Are there any drops/errors on this interface?
   On both sides there are no errors and drops. I check them by "show interfaces xe-0/1/0 extensive" command.

    Is uplink sending you (perhaps too many) PAUSE frames?
  Uplink is connected to catalyst 6500:
  c6500-BGW-XL#sh int te3/6 | i flow
    input flow-control is on, output flow-control is off
  So as I see uplink shouldn't send pause frames.
  On ex4200:
  > show interfaces xe-0/1/0 | match Flow
    Source filtering: Disabled, Flow control: Enabled
  May be I should try to disable flow control on juniper interface?

    Rgds
    Alex

    ----- Original Message ----- From: "Michael" <mschedrin at gmail.com>
    To: <juniper-nsp at puck.nether.net>
    Sent: Tuesday, August 04, 2009 5:47 PM
    Subject: [j-nsp] ex4200 throughput trouble on 10GE interface



      Hi all,
      Recentle I've installed first ex4200 to my core network with 10GE uplink
      module. Now almost every day in peak time I see sudden fall of throughput on
      10GE interface. Peak load is about 4G. At the moment outbound traffic falls
      to 3G and users notice upload speed downgrade. The only method I found to
      resolve the problem - reboot the switch. Nothing unusual is configured on
      switch, no QoS also. I've no idea how to troubleshoot the problem?May be you
      can point me to some worthful troubleshooting guides?

      _______________________________________________
      juniper-nsp mailing list juniper-nsp at puck.nether.net
      https://puck.nether.net/mailman/listinfo/juniper-nsp