Our office recently updated our switch from a 28 port SG300 to a 48 port SG-350-52MP. We immediately started having intermittent problems with DHCP after the swap.
This issue affects all VLANs, wired and wireless. Some devices are completely unable to get an address, some get one after a very long delay (up to an hour) and some devices connect immediately. We are yet to determine a pattern. Windows, OSX, Android and IOS all have the same issue
We can ping all connected devices from their perspective network. The switch, firewall, and AD server are running game latest firmware.
1 Firewall, 1 Switch, 2 AP’s, and 1 AD server.
The network has 8 VLANs
VLAN 1 is the main Office network /24. The DHCP is being handled by the AD server
VLAN 50 is Guest Wi-Fi. DHCP is being handled by the Firewall
VLANs 2-4,6-8 are Sub-Tenants. DHCP being handled by the Firewall. (I know this is not the best way to setup the network for security reasons. The subtenants were not part of the original design)
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