[NTLUG:Discuss] Re: Gateway on a different subnet?

[Dennis Rice]

The subnet mask is totally incorrect.  I would assume that a typo was 
made when they gave you the data.  It would appear that the mask should 
be either 255.255.255.240 or 255.255.255.248.   The left hand side of 
the subnet mask must be all ones, and the right hand  side must be all 
zeros.  Thus 240 is 11110000 and 248 is 11111000.  243 is 11110011, 
which is not allowed.  The all ones protion define the network address 
of a  segment, which for a  simple view, is a specific interface on the 
router.

Dennis Rice


Neil wrote:

Hello:

I am setting up a server for a client's network.

Their network admin gave me the IP info and it looks strange to me.
The machine's IP address and the gateway are on two separate subnets.
I have always had the gateway and the machine IP on the same subnet
and am wondering if this will work.

Here are the settings (Numbers masked with letters):
Machine IP 66.b.c.d 
Subnet Mask 255.255.255.243
Gateway IP 209.e.f.g

This just does not look right to me.

Can someone confirm that this will work/not work?

Thanks,
	Neil