I had a similar problem once.  I have redundant supervisor modules with
msfc's
in the 6509 and had to reboot one of the msfc's in the switch.  The reboot
fixed the problem.

>>> "Patrick Donlon"  09/28/01 03:45AM >>>
Have you checked the routing of this VLAN, if it's consistently dropping 50
% of packets could there be another route which is a blackhole? Have a look
at your routes, access lists and do some traces

regards

""Lopez, Robert""  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Group,
>
> I have a problem with a certain vlan on our network.  The problem goes
> something like this...
>
> I have a vlan105 interface created on a cat 6509.  The primary ip address
is
> x.x.105.254.  The interface has secondary addresses of x.x.155.254,
> x.x.156.254 and x.x.157.254.
>
> Servers on this network are dropping packets, one in particular,
> serverA-x.x.155.219, is dropping packets 50% of the time.
>
> Moved the server to a different switch, same vlan105, the problem
continues.
>
> Moved the server to vlan100, it works fine.
>
> Replaced cable and nics. Ensured proper speed and duplex are configured.
>
> No output from a debug vlan or span.
>
> Opened a TAC case a few days ago and the problem still remains.
>
> I just got a suggestion to remove and rebuild the vlan105 interface on the
> router.  That will happen later this afternoon.  Any other suggestions
will
> be greatly appreciated.
>
> Robert
>
>
>
>
> Robert M. Lopez
> Network Planning
> CIT PGRD Ann Arbor
> Pfizer Global Research & Development
> Phone 734-622-3948 Fax 734-622-1690
>
> "There are only two ways to live your life. One is as though nothing is
> a miracle. The other is as though everything is a miracle."  ...Albert
> Einstein




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