i have some problem

A.switch 1: ether2,3,4,5
-(1)Pc on ether3,4,5 can't get DHCP ip
(DHCP on ether2,but ether3.4.5 not browse ARP)



B. switch 1: ether3,4,5 master-port=ehter2
-(1)Can I set switch1 "only-reply" as bridge?
(I don't like user set ip therself!)

-(2)switch chip is not really switch?same master port
I test swith1 group "ARP spoofing " by netcut
(Pc01 on ether3 using netcut would cut Pc02 on ether4,at the end,
Pc03 on ether5 also dissconnected.)


C.How to create switch2?
-i want to try switch1=ehter2,3 switch2=4,5
how to make it?