Odd DHCP issue

mejinks · 22 Sep 2015 at 02:32

Ok, so set up a scope for the wireless clients in work. 10.100.120.10 - 10.100.123.254 subnet 255.255.252.0.

All has been working fine until recently where everything with a 10.100.120.x address is fine, but once it goes over into the next range (10.100.121.x) the devices are assigned the correct gateway etc, but cannot get internet/internal access and can't even ping the default gateway

What gives? Is it the DHCP server or the wireless controller (Dell Aruba)

mrkev · 22 Sep 2015 at 09:46

That would seem to suggest either the clients or router or both have not got the correct subnet mask.

mejinks · 22 Sep 2015 at 09:57

the clients that are on 10.100.120 work fine?

mrkev · 22 Sep 2015 at 11:26

Yes. So check the subnet masks on the router and clients. They should all be 255.255.252.0

ChrisD. · 22 Sep 2015 at 12:19

mejinks said:
into the next range (10.100.121.x)

That is not the 'next range' on a 10.100.121.0/22 subnet, it is the same network (range). The issue is as above, the clients have the wrong netmask assigned or the router has, that's what it seems based on what you've put.

vidda · 22 Sep 2015 at 12:35

I'm guessing the router is on 10.100.120.1/24