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Intermittent networking failure
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Junior Member
Join Date: Mar 2001
Location: Dublin, Ireland
Status:
Offline
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Hi,
I've a network of 7 computers all running OS X 10.2.6 connected via ethernet.
The computers are all set up to see each other via "Connect to Server". However, there are recurring, intermittent problems connecting the computers.
At the moment computer 2, belonging to Margot can connect to all computers except computer 7 (Judith). All other computers can connect to Judith. Computer 5 (Natalie) can connect to all computers except computer 2 (Margot). All other computers can connect to Margot.
When Margot tries to connect to Judith, I get the spinning beach ball, the Finder crashes and I have to restart the computer. I never even get to put in the username or password.
All the computers could connect last week, but now for no apparent reason, some computers can't connect to others.
Any ideas?
Andrew Montague
www.draiochtweb.com
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Senior User
Join Date: Aug 2000
Location: Ancaster, Ontario, Canada
Status:
Offline
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How are you assigning your IP address? By DHCP?
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Junior Member
Join Date: Mar 2001
Location: Dublin, Ireland
Status:
Offline
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No, they've all been assigned an IP address manually:
192.168.0.1
192.168.0.2 etc. with subnet mask of 255.255.255.0
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Administrator  Join Date: Apr 2001
Location: San Antonio TX USA
Status:
Offline
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First thing almost everybody overlooks is the wires. Double and tripple check your Cat5 cables. Not only should you visually inspect the connectors and the length of each cable, you should wiggle them while trying to connect from one computer to another.
Also, you don't mention how you have these computers wired together. Are you using a hub, a switch, or a gateway router? That could make a difference as well.
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Glenn -----
OTR/L, MOT, Tx
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Junior Member
Join Date: Mar 2001
Location: Dublin, Ireland
Status:
Offline
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The computers are connected via a hub. I'd be surprised if it was a wiring problem, because computer 2 can connect to all computers except computer 7, so obviously computer 2 is connected to the hub. Computer 7 can connect to all computers including computer 2, so computer 7 is obviously connected to the hub.
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Senior User
Join Date: Aug 2000
Location: Ancaster, Ontario, Canada
Status:
Offline
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Many hubs have an "uplink" port which is actually the same port as the immediately adjacent straight-through port, but wired backward (to avoid the need for a cross-over cable when connecting two hubs). Therefore you can't use both ports at the same time.
If you have an uplink port in use on your hub, make sure that the immediately adjacent straight-through port is vacant.
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Junior Member
Join Date: Mar 2001
Location: Dublin, Ireland
Status:
Offline
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I'll check that. However, all the connections were working last week, and I haven't changed any of the wiring.
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Administrator Join Date: Apr 2001
Location: San Antonio TX USA
Status:
Offline
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How old is the hub? Is it staying fairly cool? Has anything been spilled anywhere near it? Does changing which port computer 7 is connected to change anything?
You might consider changing hardware to see if the problem is with the hub. I personally have an aversion to hubs, since switches are so much faster and less prone to saturation. There are 8 and 16 port workgroup switches available, often for not much more than a hub with a similar number of ports. This type of switch is unmanaged, so you can usually forget about it once you get things set up, much like with a hub.
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Glenn -----
OTR/L, MOT, Tx
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