how to troubleshoot DHCP issue on cisco switch ( Not getting IP address on the desktop)

Hi Friends,

I have faced a interesting problem in Cisco switch.


DHCP Server --> CORE Switch --> Distrubution Switch ---> Access Switch---> Desktop

Issue : Desktop not receiving IP address from DHCP server.


I have troubleshoot the issues as follows.

1. Verified Desktop is connected on correct VLAN.
2, Vlan is allowed on Trunk.
3. Verified DHCP snooping enabled.
4. Verified on SVI - ip helper address configured
5. reachability  to DHCP server is verified by assigning static IP address on the desktop.

by this time, i could not notice any issues on the network, if assigning static IP address is working fine, but not getting IP address from DHCP.

Finally i have found that it failed due to wrong root bridge selected.

sh spanning-tree vlan id X.

please ensure that VLAN root bridge should be switch has SVI interface, not that access switch.

remove spanning-tree vlan priority 0 if configured.


Regards