[c-nsp] ME3600 FCS packet generation issue

[Ramji Vasudevan (ramji)]

Hi Jordi,

When you say that the packet is getting dropped by the peer router, are you seeing CRC errors on it?

Thanks,
Ramji

From: Waris Sagheer (waris)
Sent: Friday, October 24, 2014 3:11 PM
To: Jordi Magrané Roig; cisco-nsp at puck.nether.net
Cc: Ramji Vasudevan (ramji)
Subject: Re: [c-nsp] ME3600 FCS packet generation issue

Jordi,
Can you please capture the packet? Are there any layer 1 issue in the network?

Ramji,
Have you come across any such issue on ME3600X?

Best Regards,

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Waris Sagheer
Technical Marketing Manager
Service Provider Access Group (SPAG)
waris at cisco.com<mailto:waris at cisco.com>
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From: Jordi Magrané Roig <jordimagrane at hotmail.com<mailto:jordimagrane at hotmail.com>>
Date: Friday, October 24, 2014 at 1:12 AM
To: "cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>" <cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>>
Subject: [c-nsp] ME3600 FCS packet generation issue

Hello,
My name is Jordi. I have a strange issue with one of my
ME3600. I have a ME3600 connected to a C7609 via the G0/24 port and
connected to another ME3600 connected via G0/22 port. In the middle of
the connection between the two ME3600 there is a SDH network (Ethernet
over SDH). I have a recurring issue in the ME3600, for some reason when
the device receive a packet and forwards the packet, the device sends
the packet with FCS errors, so the other end detects the "input error"
and drops the packet. I don't know if the device sends the data
corrupted or makes wrong the calculation of the FCS. The device can work
correctly during two months and some day the device starts with this
problem. Reloading the device fixes the issue during a time. I saw the
issue for the first time at June. I changed the device, but the issue
appeared again and I upgraded the IOS from 15.3(3)S to 15.4(2)S1 but
still the same. I think that this issue could be a bug but I don't know
which event triggers the issue. Someone could help me?
Thank you very much and sorry for my English.

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