How do I know the dhcp server's address in the shell

I have enter the ipxe‘s shell , I want to know the DHCP SERVER's address, is there some command can tell me this?

I use the PXE to load the ipxe, and then I want to use ipxe load the vxworks’ bootrom, the bootrom is stored on the dhcp server, so I want to know the dhcp server's address. Please help me , thanks very much：）

I‘m a CHINESE， my English is not so good, I hope you can understand what I said