I understand you to say that there are two 5505s on each floor. Half of the
users on each floor connect to each 5505 through a single vlan. Each 5505
connects to a 6509.
Has anyone changed the config of any of the switches lately? Any hardware
changes?
Thinking intermittant hardware failure.
Do all the users on a floor who loose connectivity connect to the same 5505?
Does the aggregate of all users on all floors who loose connectivity connect
to the 6509 through the same blade via their 5505s? Any error messages on
the 6509? What's the uptime? What does a show log provide?
What is the bandwidth of the links between the 5505s and the 6509?
If gig, do you have any spare GBICs? I have heard reports of failing units.
Any construction in the building? How about lots of dust in the wiring
closets?
Any commonality to the electrical feeds for the switches? UPS or not?
Can you log error messages to a syslog server?
> -----Original Message-----
> From: Don Oxman [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, July 31, 2001 6:44 PM
> To: [EMAIL PROTECTED]
> Subject: Intermittent connectivity loss [7:14416]
>
>
> I must admit this is my first question posted to the group,
> though I've been
> a lurker for a long time. Here it is:
>
> We have workstations on 10 different floors (each floor
> divided in half,
> each half a different subnet), all connected to 5505's (20 in
> total). From
> the 5505's fiber goes to a 6509, then ultimately to the WAN
> via ATM. The
> servers all plug into the 6509. So far, so good.
>
> For the past 3 days we have had workstations (not all, but
> about 50%)on
> every floor lose connectivity to the network, whereby all of
> our NT and
> NetWare servers are unavailable and web browsing is gone.
> This has happened
> a total of 6 times, and there doesn't appear to be a pattern
> to the time or
> network utilization. Most times the users have to reboot,
> though sometimes
> they can reconnect without a reboot.
>
> Can anyone help steer me in the right direction? Our WAN
> guys can't help,
> and I have a feeling that it's going to be up to me to figure
> this one out.
>
> Thanks a lot.
>
> --Don
>
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Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=14426&t=14416
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