devices on the same VLAN not able to communicate

[Mactep]

To have more IP addreases it is set up with /23 or 255.255.254.0 mask. And for some strange reason 192.168.2.X do not see 192.168.3.X devices and vise-versa.

Please advise.

[ammahend]

are they on wireless ? is client isolation enabled under firewall and traffic shaping ?

[Prestont]

we might need more information.

wired or wireless?

how are you trying to communicate with each other. Ping? if so, is firewall on the computer allowing it. are they connected to the same switch or dose it transverse a firewall? 

for a very simple test connect the two computers to the same switch and try to ping each other. also if across diffrent switches is the trunk set to allow that vlan?

[PhilipDAth]

Have the devices with the problem got the same (and correct) subnet mask of 255.255.254.0 ?

[DarrenOC]

It’ll either be a subnet mask issue or devices have wrong DFG

[Mactep]

They indeed have the same and correct subnet mask of 255.255.254.0

[CoreyDavoll1]

If they on separate switches, make sure that the ports that connect all of the switches together are trunked with the correct vlans.