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Weird Drops on 5406zl

Martin De Blois
Occasional Contributor

Weird Drops on 5406zl


We have 10 5406zl running the latest firmware (11.69) and we have millions of drop on every ports. I have found out that every time you plug a device (ip phone, computer,etc) in a port, a random number of drops appears. No errors, just drop. The drop are stable after the initial connection. Anyone has an idea? We had the same problem with the previous firmware 11.63. Rebooting the switch only fix the problem for a couple of hours before they reappears again. We have disabled STP, LACP, POE and test on a stand alone switch with the same results. It doesn't seems to affect the network performance but I don't like it. Anyone has the same problem or have an idea?

Here are the port info.
Link Status : Up
Bytes Rx : 8,602,943
Bytes Tx : 618,448,260
Unicast Rx : 42,458
Unicast Tx : 555,705
Bcast/Mcast Rx : 6566 Bcast/Mcast Tx : 5,344,497
FCS Rx : 0
Drops Tx : 8,890,384
Alignment Rx : 0 Collisions Tx : 0
Runts Rx : 0
Late Colln Tx : 0
Giants Rx : 0 Excessive Colln : 0
Total Rx Errors : 0
Deferred Tx : 0

Thank you,
Regular Advisor

Re: Weird Drops on 5406zl

they released 12 try that firmware...
dont know if it will help...
Bruce Campbell_3
Valued Contributor

Re: Weird Drops on 5406zl

We have a 5406zl as the router for
about 2,500 computers on about
75 2650 switches.

The interfaces on the 5406zl showed
some significant Tx Drops when
I rebooted switches connected to
that port. I assumed this
was because the port was blocked
by STP briefly, but I didn't investigate
further. But you've tried with
STP disabled, so perhaps something
stranger is at work.

Bruce Campbell
Director, Network Services
Information Systems and Technology
MC 1018
(519)888-4567 x38323
University of Waterloo, Waterloo, ON
Ulrich Saur

Re: Weird Drops on 5406zl

It is the same for us, even with the newest firmware.

Also, there is no difference between switches or clients connected to the 5406... :-(