Subnet Masking Help Needed Badly...

[eatonqst]

IT recently added a second subnet for plant floor machinery and I am no longer able to reach the FTP server because the cutting machine has an IP Addr on the new subnet. They are physically connected to the same Hawking switch. IT is located 1200 miles away, and has not been very supportive.

Original subnet: XXX.XXX.190.151 (FTP Server)
New Subnet: XXX.XXX.191.xxx (Cutting Machine)
Subnet Mask: 255.255.255.0
Gateway: XXX.XXX.190.254

I am a machine programmer and I am new to the network configuration side of the process, and any help would be greatly appreciated.

Questions:
1. How do I determine the correct subnet mask, and is that the problem?
2. Doesn't the gateway address have to be in the subnet that you are addressed into, ie subnet .191. has a gateway with .191.?
3. How will this be affected with the upgrade to a level III switch in several months.

 

[PAGEME1000]

hi there

you are correct in your first two assumptions. Either you need the correct subnet mask so both the .190 and the .191 appear as one network. This can be done by changing the subnet mask to probably be 255.255.254.0. (check on a subnet calculator) In theory this would make the range x.x.190.0 - x.x.191.254. Alternativley you need to use a router between the two subnets. You would then have a gateway in each network.

Changing the subnetmask will fix the problem but you will need to keep an eye on the number of devices in the network to avoid a high level of broadcasts.

hope this helps

page.

 

[eatonqst]

Thank you page.