From: Pablo Jejcic (pablo.jejcic@smartweb.rgu.ac.uk)
Date: Fri Oct 24 2003 - 08:42:33 EDT
Hi gurus,
First the situation:
We have three vlans configured on the network, the three of them are
connected trough a CISCO core system (some kind of huge router/switch super
smart device, that I don't have access to). In all the vlans are some Unix
server (Solaris) and a lot of window$ XP machines. BTW the same network is
running Novell 6 too.
Now in vlan1 I have a Solaris 9 V480 server running and talking with
everyone in the same vlan quick and without problems. In vlan2 and vlan3
there are some Solaris 7 and 8 (on E450, E220, sparcstation5 and
SPARCstation) running on the same way, smoothly connecting with the other
servers and the clients.
The problem is when we try to put all the vlan to talk among them... My
server on vlan1 take like 6 minutes (from my watch) to telnet to any server
on vlan2 or vlan3, when you get connected everything work fine. You can see
the same behaviour in many other apps, for example, a quick test for network
connectivity is ping, when I run ping from my server on vlan1 to vlan2 or
vlan3 it takes 30 seconds for the second package to go trough (yes, the
second, the first on goes perfect, but the second takes time come back), but
if I do the ping from the vlan2 to my vlan1 it takes like 6 minutes for the
second package.
OK, so we put a sniffer at the exit of vlan2 server and ping vlan1, same
behaviour on the server, but the sniffer see all the packages coming and
going without any problems/delays.
Now the weirdest, if we do a ping from a pc from the same vlan (even from
the same port on the switch) to the server, it works perfect!
I'm out of ideas here... Anyone could give me anything to test/try?
Thanks.-
Pablo.-
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