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GIS server array, slow web performance

By lkrause ·
Greetings,
I am running a webite (GIS - geographic information system Internet Map Server)
at my university, Here was the previous setup before we moved the servers:
4 windows NT 4.0 server machines with service pack 5, all hooked up to a ciscocatalyst 2912XL switcher.

Recently we moved this "array" to another department & we have the array hooked up to an identical cisco switch, hooked to the buildings switch, to the university backbone. However it has been about 2 weeks since we moved the computers and reconfigured the machines to work in our local department. The website is really slow - off campus, though, the switch stats are really good the switch is operating ideally, but when users connect either from a t-1 off campus or even through a modem it takes them "forever" to get map reloads (zoom ins) etc... and we have no idea what the problem could be because before the site was fast for modem users (relativly) and for off campus t-1 lines etc.. when we ping the switch weget (over out internal network) <10ms TTL 248, then we ping a machine (one of the four servers)on the switch and get <10ms TTL 122 the TTL is in half, and i know that TTL or time to leave is simply a timing for how many more hops the packet can makebefore being resent/lost. If we ping the old switch in the other department we get <10ms TTL 255, then we ping a computer on that switch and get <10ms TTL 248 why would this TTL not be the same as our computers (almost 1/2 of its value)? Is there more network troubleshooting methods we could use to fix our problem? Any enlightening perspective would be heplpful,
thanks


lucas

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GIS server array, slow web performance

by jay In reply to GIS server array, slow we ...

Have you try ping hosts with different packet size?
If you sure your server in good condition you must check your networks.
Try ping with 128, 256, 512 or 1024 bytes, if you get some problems with large ping packet you can ease to search where theproblem is, becaus on ethernet the packet size or MTU is 1500.
Maybe the problem was on cable, modem, switch or NIC.

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GIS server array, slow web performance

by lkrause In reply to GIS server array, slow we ...

The question was auto-closed by TechRepublic

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GIS server array, slow web performance

by estebandelatorre In reply to GIS server array, slow we ...

Just some ideas...
Issue a tracert.exe in order to count hops (Vlans) between switches and routers. Perhaps your switch is not connected to the backbone directly...
Watch for a correct speed and full/half duplex negotiation between your servers and the switch. Bad negotiations speed are very common problems...
good luck

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GIS server array, slow web performance

by lkrause In reply to GIS server array, slow we ...

The question was auto-closed by TechRepublic

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GIS server array, slow web performance

by lkrause In reply to GIS server array, slow we ...

This question was auto closed due to inactivity

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