I have an odd issue here and i’m sort of going down the list to get to the root cause. Is there anything in UCS that will prevent connecting from different VLANs?
I have a handful of UCS servers in a “server” vlan along side various other servers. There are another 4-5 VLANs for various other purposes. We have 2 pfsense firewalls in HA configuration to cross VLANs. All of this is running on a Proxmox cluster.
All of a sudden we cannot connect to some of our UCS servers, on the server VLAN from other VLANs. It looks like the packets are being dropped. My first thought was to look at the firewall but I don’t see the connections being blocked and even from subnets where there are any:any rules the UCS servers are not accessible. I’ve tried both firewalls and i even migrated the firewalls to different hosts in the Proxmox cluster but the results are the same. What’s very odd is this only affects UCS servers, but not all of them. The issue starts with one server and eventually moves on to others but only the UCS servers, and not all of them. The servers are always accessible from the server VLAN. We got hit hard with storms last week where we lost power, and after a full system shutdown all UCS servers but one are accessible again from different subnets. However, just a couple days later we now have 2 UCS servers we can not access.
I’m not convinced this is a UCS issue but as I said a couple of these subnets have any:any rules and every other server on the server vlan is accessible from those subnets, so i have to ask. Is there anything in UCS that will prevent or promote connecting from different VLANs?