We recently put our SG500 switch in layer 3 mode. Its set up with a few vlans (1,25,175,1000, etc.). It can talk out and between vlans, no problems there. The major problem I'm have is that I cannot get DHCP between the vlans.
From all that I have read online, in order to accomplish this is basically turning on dhcp relay and configuring ip helper. But when I do, I get something like this:
192.168.100.1 is the address of the vlan 1000, 192.168.0.7 is the where DHCP server which is on vlan 1. I know its not best practice, I'm just trying to get it to work currently. I get the same response whether I use 'all' or any of the other VLAN IPs.
Does this mean that this model will not do UDP relaying for DHCP? Or am I going about this entirely wrong? I'll post my config if it will help.
Ok I found the issue. The DHCP server was located on VLAN 1, which incidentally is also the management VLAN (i.e. a non-routable VLAN). After moving the DHCP server to another VLAN and pointing it to the IP address of the server, it worked like a charm.
So, the lesson here is that you shouldn't put your DHCP server on the management VLAN or you're gonna have a bad time.
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