Router communication troubleshooting
Hi All & Happy New Year,
Just a quick question about networking, hope I've put it in the correct place. We recently introduced a new additional fleet of devices which started using the next subnet of IP addresses (10.5.209.* , all existing kit operating with 10.5.208.* with a subnet mask of 255.255.254.0) now the new devices picking up the latter addresses can communicate with existing devices and the servers great - however they cannot get on the internet.
They cannot ping the router, I've tested by taking one of the existing devices and changing it to static IP settings to match the other network equipment and it can suddenly ping the router.
The router is 'managed' by the local authority and was configured by them, I've come to the conclusion they may have given the router a subnet mask of 255.255.255.0 (it has an IP of 10.5.208.1) rendering it unable to communicate with the new devices on 10.5.209.*, I've submitted a help request off to them but from experience it takes weeks for action which isn't really an option. Just after some confirmation that there's nothing obvious (or not!) that I may have overlooked while I wait for them or before I push them/go higher up for help.
Many thanks in advance,