numazupt
asked on
timeouts because of a hub
im in a subnet, in it we have two routers, one connects to a rdis (128) and the other to frame relay.
i have three hubs cascade(all are unmanaged).
my server as solaris whith informix aplications.
the problem:
the users connect to server normaly but only last about five minutes are disconnect by a timeout of 10seconds.
i changed one user from that hub to another and he is working fine.
the dmi/dmix is correct.
question:
what can i do to see if the problem is really the hub or something else.
and are there tools for win95 to see if the hub is working fine(all ports in the hub).
i have three hubs cascade(all are unmanaged).
my server as solaris whith informix aplications.
the problem:
the users connect to server normaly but only last about five minutes are disconnect by a timeout of 10seconds.
i changed one user from that hub to another and he is working fine.
the dmi/dmix is correct.
question:
what can i do to see if the problem is really the hub or something else.
and are there tools for win95 to see if the hub is working fine(all ports in the hub).
Well what kind of Hubs are they? Are they Class II repeaters or above? Are they Fast Ethernet (10/100Mbps) If they are fast ethernet you have too many hubs. Either way I would say that your configuration of 3 hubs is wrong and thats whats causing your issues.
I agree with jwalsh above - three cascaded hubs is asking for trouble. If they're unmanaged hubs, then there is no way to get any diagnostics on the hubs without methodically testing each port one after the other. The static energy certainly won't help, and you may find that you need (a) to replace at least one of the hubs with a switch, and (b) cage the hardware to reduce its exposure to the static, and perhaps use STP cable where it runs through electrically noisy areas.
Vijay
Vijay
ASKER
i have 3com superstack II(dual speed 24) and two officeconnect dual speed 8. connected in cascade.
1 hub- officeconnect
2 hub- officeconnect
3 hub- 3com superstack II
Ethernet network
1 hub- officeconnect
2 hub- officeconnect
3 hub- 3com superstack II
Ethernet network
That would be your problem. you can never use 3 100 Mbps Hubs together. You will have intermittent problems until you seperate those hubs with a switch.
ASKER
i have 3com superstack II(dual speed 24) and two officeconnect dual speed 8. connected in cascade.
1 hub- officeconnect
2 hub- officeconnect
3 hub- 3com superstack II
Ethernet network
1 hub- officeconnect
2 hub- officeconnect
3 hub- 3com superstack II
Ethernet network
okay but you still need to break up those hubs with a switch.
ASKER
i have consulted 3com and they told me that isn't a problem, the only thing that maybe is causing th failure is the cable that connects the hubs can not be longer than 50cm and that should be cat5 preferebly stp. And that static energy could cause the problem also. but they told me that tree hubs connected are not a problem.
Well if we are talking hubs not switches by design using Fast Ethernet on CAT5 your entire run from source to destination can not be longer then 200 meters, you can only have 2 Class II Repeaters in between. Otherwise the respnse from one end points is too long and they can't detect signals fast enough to avoid collisions. It doesn't really matter what 3com says thats just how fast ethernet over copper works.
ASKER
yes thats is correct jwalsh88.
so you advice me to put a switch in between hubs, but then i would creat segment in the network, isn't this correct?
it will be like if i had two hubs (one hub= the two office/the second= the dualstack) i think.
And i dont want that i want to maintain th tree hubs as one.
what do you advice
so you advice me to put a switch in between hubs, but then i would creat segment in the network, isn't this correct?
it will be like if i had two hubs (one hub= the two office/the second= the dualstack) i think.
And i dont want that i want to maintain th tree hubs as one.
what do you advice
ASKER
yes thats is correct jwalsh88.
so you advice me to put a switch in between hubs, but then i would creat segment in the network, isn't this correct?
it will be like if i had two hubs (one hub= the two office/the second= the dualstack) i think.
And i dont want that i want to maintain th tree hubs as one.
what do you advice
so you advice me to put a switch in between hubs, but then i would creat segment in the network, isn't this correct?
it will be like if i had two hubs (one hub= the two office/the second= the dualstack) i think.
And i dont want that i want to maintain th tree hubs as one.
what do you advice
ASKER
yes thats is correct jwalsh88.
so you advice me to put a switch in between hubs, but then i would creat segment in the network, isn't this correct?
it will be like if i had two hubs (one hub= the two office/the second= the dualstack) i think.
And i dont want that i want to maintain th tree hubs as one.
what do you advice
so you advice me to put a switch in between hubs, but then i would creat segment in the network, isn't this correct?
it will be like if i had two hubs (one hub= the two office/the second= the dualstack) i think.
And i dont want that i want to maintain th tree hubs as one.
what do you advice
I don't really see what you are getting at but while this will segment your network, logically it will still be exactly the same. YOu don't have one hub, you have 3 hubs. you will still have 3 hubs.
I just realized since you weren't very descriptive I have no idea how your 3 hubs are connected together. Some hubs can be connected with special cables but most are connected with ethernet cables. How are yours connected? Because if they are connected together with special daisy chain style cables you might be able to use more then 2 but I don't think so.
I just realized since you weren't very descriptive I have no idea how your 3 hubs are connected together. Some hubs can be connected with special cables but most are connected with ethernet cables. How are yours connected? Because if they are connected together with special daisy chain style cables you might be able to use more then 2 but I don't think so.
ASKER
first i ask for forgiveness because it seems that i am experiencing some trouble when i post (it apears two or three postings)
they are connected whith ethernet cable.
what is strange is that i today put dmi/dmix to dmi and then put back to the original position and the problem desapeared.
if you have an email jwalsh88 i will send to you a map of the network(made in visio)
thank you all
they are connected whith ethernet cable.
what is strange is that i today put dmi/dmix to dmi and then put back to the original position and the problem desapeared.
if you have an email jwalsh88 i will send to you a map of the network(made in visio)
thank you all
jwalsh88@flash.net
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ASKER
if th hubs are unmanaged, i can only change in the users nic to work at 10. Correct me if i'm wrong.
You are correct.
ASKER
maintaining my hardware that's the only solution that you see jwash88.
or there is another.
or there is another.
ASKER
thank you jwalsh88
ASKER