My server guys are trying to get servers that are up..that will only talk with each other..no outside traffic...however
the servers are on different switches...
with no default gatweway being assigned
we can connect the switches via trunks..
but will this work?..
do they need to be assigned to their own vlan ?
right now everything is on default vlan 1
the switches are being configured for the same "subnet" range...
If the other switch was configured to use VLAN 1 then it certainly would explain the problem that you were having. If the servers need to communicate with each other and not have a default gateway then the servers MUST be in the same VLAN.
Answering the second part of your question is difficult without knowing what kind of switch you are talking about. If it is a layer 2 switch (which would be consistent with some of the things that have been in the post) then the switch can not configure 2 VLAN interfaces with IP addresses on each. A layer 2 switch can have only a single IP address configured on the switch. If the switch is a layer 3 switch (which would be consistent with the fact that you can configure an IP address directly on the fastethernet) you could configure a second VLAN interface and put an IP address on it. But to do that you would also need to configure IP routing on the switch which introduces default gateways into its operation. And since the point of this discussion seems to be to not have default gateways then I believe that you could not have both the 10.1.8.0 and the 172.18.8.x active on the switch.