Subnet mask question/problem
Posted on 2007-03-28
I have a network that has two subnets. Each subnet is at a different physical location and connected with a PTP T-1. I have an SBS 2003 Server/Exchange Server at one location. That subnet is 10.0.0.0. I have a server 2003 machine at the other subnet and it is 192.168.10.0. Each location has multiple workstations. The network is functioning well and as expected with no known problems. However, in preparing for some future changes, I just realized that most of the equipment (those with fixed IPs) like my firewall and VoIP server are using a 255.0.0.0 subnet mask. But, my SBS server is using 255.255.0.0 subnet mask. It has been this way for a long time. My questions:
Is this a problem?
Should I change the mask on the SBS machine to 255.0.0.0?
If I do, will I have any potential network communication issues?
For the routing table in my Adtran NetVanta 3205 connected to the 192.168.10.0 end of the T-1, should the subnet mask for 10.0.0.0 be 255.255.0.0 or 255.0.0.0 or will it make any difference?
Any related issues I should be aware of?
Please limit the "jargon" in your response if possible as I have no formal network training. Plenty of seat of the pants experience and a logical mind that can figure out just about anything as long as all of the words used make sense.
Thanks in advance for the help.