[j-nsp] port mirror on EX causing crash

[Luca Salvatore]

For anyone who is interested turns out we hit this bug

PR658614
"When you configure both sFlow monitoring technology and port mirroring features, parity errors might occur, which might cause the switch to crash and then reboot."

We had sflow running, then turned on port mirrioring... two days later crash!

________________________________________
From: juniper-nsp-bounces at puck.nether.net [juniper-nsp-bounces at puck.nether.net] On Behalf Of Luca Salvatore [Luca at ninefold.com]
Sent: Wednesday, 10 April 2013 3:35 PM
To: Ben Dale
Cc: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] port mirror on EX causing crash

Yes this is what has happened to us... twice in two days.
Only change on the switch was setting up a port mirror... This would probably consume a bit more memory which may have triggered the crash.

I have already organised the RMA, was just wondering about the mirroring.

Luca


-----Original Message-----
From: Ben Dale [mailto:bdale at comlinx.com.au]
Sent: Wednesday, 10 April 2013 3:14 PM
To: Luca Salvatore
Cc: juniper-nsp at puck.nether.net
Subject: Re: [j-nsp] port mirror on EX causing crash

Yep - listen to JTAC.

The parity error is definitely a sign that the memory on your switch is flakey - I had an EX4200 completely lock-up and drop out of a VC after 6 months of flawless operation.  Rebooted it and it came good, 24 hours later it dropped right back out again with the parity error again.

RMA and everything is happy again.

On 10/04/2013, at 2:50 PM, Luca Salvatore <Luca at ninefold.com> wrote:

> Wondering if anyone has seen any issues with EX switches running port mirroring - specifically seeing the switch generate a 'parity error' and crashing?
> I have an EX4200 10.4r5.5, a few hours after turning on port mirroring  the switch crashed.  It threw some memory parity errors which JTAC tells me means the switch is faulty and should be replaced.
>
> The switch in question has been running fine for 3 years, but turning on a ingress and egress port mirror (on a single port) seems to make the switch have a bad day.  The switch isn't busy, and the port that I'm mirroring has about 80 to 100Mb of traffic.  I'm mirroring the port to an IDS and would like to keep it running for the foreseeable future.
>
> Any thoughts on this situation?
> Thanks
> Luca.
>
>
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