My case is like as follow:
A switch C2960 is connecting a DHCP server with trunk vlan 2.
If one client PC without static IP is connecting to a vlan-2 port. It can get DHCP IP.
If one client PC with static IP is connecting to a vlan-2 port. However, it can't get DHCP IP.
If the trunk port C2960-to-DHCP server connection changes to access port with vlan 2, it has get DHCP IP again.
Can anyone help me to fix the problem?