01-14-2009 02:32 PM - edited 03-04-2019 12:50 AM
Hi we have a 6509 running 12.2(17d)SXB11 with a strange error
A LES 100mb circuit is plugged into port gi4/48 L3 (copper) when utilisation of this hits 100% it causes extreme packet loss on ports gi1/48 and gi1/41 which are completely un-realted (one is another LES circuit 100mb copper L3 link and one is to a server in the same room 1000mb L2).
has anyone ever experienced anything like this before? I guess it could be a hardware fault but all reports and logs show no fault.
Thanks in advance
01-15-2009 04:51 AM
Hello Jonathan,
depending on the line card model groups of ports share some hardware resources (ASIC chips).
In your case may be groups of 8 ports of the same 48 GE 10/100/1000 linecard use the same ASIC.
This could explain the relation between ports g1/48 and g1/41
Hope to help
Giuseppe
01-15-2009 05:12 AM
thanks for your response Giuseppe, the card is SFM-capable 48 port 10/100/1000mb RJ45 WS-X6548-GE-TX
do you know if that one shares the ASIC chips?
also why would performance on module 4 effect module 1?
they are all the same type of module
01-15-2009 02:30 PM
Hello Jason,
>> also why would performance on module 4 effect module 1?
I took the two ports as being on the same linecard !
Sorry for this, they should be unrelated but I see you are doing some form of circuit emulation what do you mean with LES ?
this can create a link between the ports the feature may allocate buffers or queues that are shared and when one link is full other frames wait to be transmitted filling these resources. (just a guess)
Hope to help
Giuseppe
01-16-2009 02:58 AM
Hi, LES is just a name for a leased circuit in Great Britain sorry if that's confused.
I've got TAC on this one so i'll speak to them, thanks
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