For some reason when i try to reach a particular VLAN from any machine in another VLAN it is looking for that machine on the ISP Gateway. Even on PFSENSE server if i try to ping a machine on that vlan the request seems to be going to the ISP gateway and failing. This was working fine in the morning. The only thing i played around was with the DNS settings. But even after rolling back the change in DNS server the issue is not resolved.
Please advice on how i troubleshoot this. This seems to be happening only for 1 VLAN
Ok I identified the problem But i cannot resolve it. I check the route table in PFSense (Diagnostics–> Routes) and found that all the machines in the specific VLAN having this issue was having an entry there and point to the Internet Gateway. Deleting these route entries resolves the issue, but these entries come back after a few minutes. These machines on this VLAN are my 2 DNS servers
Any ideas why these entries keep coming back ?