Slow DHCP on 2810-24 switch

[jtabet]

I have a 2810 24 switch configured with multiple vlan but no dhcp relay or dhcp snooping.
a dhcp server/client are connected to the switch.
the dhcp client takes around 30-45 seconds in order to get an address lease.
on the switch default configuration it is less than two seconds.
any has seen this behavior?

 

[chumguy]

We don't have any of these switches. If you have multiple VLANs, you'll either need a DHCP server on each VLAN or a DHCP helper address on each VLAN pointing to the DHCP server with appropriate scopes set up.

It doesn't make sense that the clients are getting IP addresses if the DHCP server is on a different VLAN than the client? They aren't getting self-assigned addresses are they?

 

[jtabet]

Hello,
I am talking about one vlan. the dhcp server and the client are on the same vlan.
the other pc's connected to the other vlans uses static IP assignments.

 

[jtabet]

solve it.
In fact it is not the DHCP.
spanning tree is enabled on the switch, so when a port comes up it takes some time for the switch to start forwarding traffic.
meanwhile the pc would have already sent some dhcp request, with no reply.
it can be solve by disabling dhcp