We (tonight) upgraded an equipment rack and added a couple "smart" switches in replacing our old standard "dumb" switches.
In this process it seems that our newer, but inexpensive HP 2510-24 switches don't like to play nice for some reason. I defaulted them (since they were used) but am having an issue with what seems like the ports are VLAN'ed to some effect.
The system goes Image Stream router - Switch - NBM5 (ap WDS) - NBM5 (ClientWDS) - MT router all with GW's of the IS router and such. Previously it was Image stream (no switch) and so on.
We never had a problem with this senario previously. Now it seems that a client device within the correct subnet plugged in to the switch directly can access the NB's and the MT but nothing past the MT. But anything after the MT, can't access the NB's, but can the GW. It's the darned weirdest thing I have really ever seen. In some respects we run a pretty good network, it's been routed from the get go, and I have never had to deal with a smart switch that may or may not be causing me grief so I am quite perplexed right now (and tired as hell which doesn't help)
I had a similar problem with a new switch (tonight as well), same model, causing us problems on the public IP side of things. We couldn't get in to one of our servers thats 1:1'ed at the Image stream, but we could access one that was a direct public IP via the switch. Replacing that switch with a dumb switch and all was good instantly.
I have rebooted everything to clear ARP tables, and just about anything I could think of, including making sure no VLAN's were active on any of the ports (and maybe that is where I goofed, but that is defaults which should be correct IMO since we don't run VLAN's anywhere)
Does any one have an idea? I don't get it for some reason. And I don't feel that I am dumb at networking, or configurations.--