Just a little background, I am a 21+ year IT pro, jack-of-all-trades type, but I would have to admit that networking is not my strongest area.
I think this is simple. Recently I moved the core routing off of my Checkpoint firewall and on to the Dell 6224. Currently, I am using only one port on the switch (actually 3, but the other two are for other networks, so they don't apply) and I have routing working for production networks. That is the key here, clients can get to servers, all the applications work.
But, there is a management network as well. Most of the devices on the management network use the 6224 as their default GW and I can access those from other subnets/VLANs. However, some of the IPs on the management network belong to Windows servers, which are dual-homed and have their default GWs on the production subnet/VLAN. When I try to access those IPs, I can't. Previously, when I was using the Checkpoint as the router, I could access those dual-homed systems on either IP.
I suspect that because the Checkpoint is more than a router, that has something to do with it. I also suspect that the current behavior is not wrong. SO, I guess my question is if it worked before, why not now? Or if it should still work, why doesn't it?