SERIOUS PROBLEM - Slow Cabs

[SteveAudus]

SERIOUS PROBLEM - Slow Cabs

I have 10 network cabinets, 250 computers (nt AND xp),
all linking back to a central cab with the server (Win2k).

All the computers plugged into only certain cabs are running very very slow, on any network communication between cabs or back to the server.

I am really really confused, with this problem,
we have shut down the whole network, and brought it back up,
cabinet by cabinet, but it still persists.

Any suggestions,
what is my next step.

This network has been working without any problems for over two years.

The Cabs
contain
Micronet SP616D Etherfast 10/100 Mbps Switch
the cabs are connected using Fibre
Micronet SP372F
100Base-TX to 100Base-FX


Please please help, a very confused tech.

Thanks you

Steve Audus
Chuacer School

http://www.chaucer.sheffield.sch.uk

 

[nawlej]

Without seeing your network topology, I cant really be of much assistance, but I would almost be willing to bet that all the cabinets hooked up to that fiber patch are slow because of a bad cable or fiber patch, or one of the ports on thebackbone switch is bad and causing errors. Im not familiar with micronet, but are they managed switches, as in, can you go into them and pull port statistics off of them? You could certainly usually pinpoint the problem like that.

___________________________________
[morse]--... ...--[/morse], Eric.

 

[bcastner]

You really should review:

http://support.microsoft.com/?kbid=315237

 

[nawlej]

Ots not a problem with the server itself as the article implie3s, but hes having trouble with a few cabinets hooked up to each other by fiber.

___________________________________
[morse]--... ...--[/morse], Eric.

 

[SteveAudus]

Thank you for your suggestions and help.

The problem did indeed turn out to be,
6 fibre convertor ports in our Micronet SP654 Switch,
these ports looked fine from the lights,
but I plugged a laptop in and identified the problem.

Strange that this model contains 8 ports,
and two are working fine.

Thanks again.

http://www.chaucer.sheffield.sch.uk

 

[nawlej]

NEVER go by port lights....they just basically tell you its on and passing traffic, regardless of the condition of them. THe switch probably blew out something on its backplane, which would explian 2 ports that were fine, they probably werent part of that section of the backplane.

___________________________________
[morse]--... ...--[/morse], Eric.