They're connected to one router by fibre which is connected to the router hosting the DHCP server by two T1 lines. The DHCP router is in another city. The two exs do host different VLANS and the majority of devices connected to each switch work. I can disconnect and reconnect devices that were plugged into jacks before this issue occured and they'll still pick up the same IP. I didn't originally setup the switches so I'll have to look when I get back to work.
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