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Old 09-16-2015, 10:23 AM   #1
ron7000
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Registered: Nov 2007
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weird connectivity question on subnet


so i have a few systems on the network and the switches/routers they are plugged into are managed.
i have one linux system (A) on static ip address for example of 180.170.160.20.
it works fine.
a second system (B) i made static ip address of 180.170.160.21.
this second system if i'm on the console i can ping and connect to A no problem. and A can see B no problem.
However A can get out to the rest of the network, where B cannot.
And if i'm on my win7 pc in the other room which is dhcp and on something like 180.170.25.24 that sees everything including system A but not system B.
when i try to ping 180.170.160.21 it says
pinging 180.170.160.21 with 32 bytes of data:
reply from 180.170.10.192: destination host unreachable.

on linux systems A and B the subnet mask is 255.255.0.0.
my win7 pc subnet mask is 255.255.252.0

can someone offer an explanation and recommendation?
 
Old 09-16-2015, 06:43 PM   #2
rossi141
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Registered: Sep 2015
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Your masks look wrong:
A = 180.170.160.20/16
B = 180.170.160.21/16
Win = 180.170.25.2/30


The IP address range for A & B is:
180.170.0.0 - 180.170.255.255

The IP address range for Win is:
180.170.20.0 - 180.170.25.3

This overlaps the network that Win is on.
It looks to me that A & B should be on a /24 bit subnet (255.255.255.0).
Either that, or Win should be on the same /16 subnet as A & B - are they separated by a router?

- Rossi
 
  


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