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

[Michael]

I'll disable flow control on both sides today and tell about the results.

2009/8/5 Alex <alex.arseniev at gmail.com>

>  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 <mschedrin at gmail.com>
> *To:* Alex <alex.arseniev at gmail.com>
> *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
>>>
>>>
>>
>


-- 
С уважением,
Щедрин Михаил
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