I just deployed a build having netgate 6100 and 3 ubnt switches. 6100>48port>2 24 port switches.
There was a power outage yesterday and ISP modem lost internet and came back. But after that devices are not able to go to internet. I also changed the setting of Flush states. All the VLANS are set correctly everything is set properly. Only issue, I am facing is some devices are not getting IP addresses and some of them are getting IP’s but not able to see internet.However some of them are working fine. I am confused what to do. I had already deployed it at site and now having this kind of weird issues.
I rebooted them. Also all VLAN’s are having allow all rule for right now. Also turned off dns resolver. I just want them to resolve dns using 9.9.9.11 and other resolvers.
I had some similar issues using the 6100 and Kia DHCP. I changed back to ISC DHCP and all the flaky hosts returned just fine. But I could tell that I had not getting proper IP address assignment, or the DNS IP for the VLAN was not being broadcast properly to the host. It feels like KIA is still a bit unstable.
Not sure this will help you, but worth checking. Rebooting the problem hosts did not help since pfSense’s DHCP server was the issue.
I did it. Now everything is getting IP’s. One more issue I found out is, one of my VLAN’s are not getting internet. Maybe because of Outbound NAT issue. Can someone also suggest what to do for that.
Right now NAT is on AUTOMATIC. screenshot is attached.
Have you done a PCAP on the LAN side (filter for DHCP/MAC) and rebooted one of the switches?
DORA is a very simple protocol to follow. And pretty quick to diagnose which side is not pulling its weight. As well the packet data would contain the details of the exchange, the Offer packet should contain subnet and gateway.
If the FW does not see the Discover packet, test from a system on the same VLAN (or span a port), if that system does then the issue is between the broadcast domains.
