DHCP problem

Unanswered Question
Feb 12th, 2007


i have configured a cisco router 2811 who is connected to switch 3550 in F0/1 by his G0/0 interface.

i configured 2 dhcp pool in the router.

whene i put the ipPhones in the switch, they can have an ip address via the Voice pool, but the Laptops putted in the IpPhone canot have an ip address from data pool.

can you help me and tell me the corrections that i must do in the configuration (swith + router)

many thanks

I have this problem too.
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rickyt888 Mon, 02/12/2007 - 17:37

Try to allow data and voice vlan on the same switchport,


Interface FastEthernet 0/5

switchport trunk encapsulation dot1q

switchport trunk native vlan 20

switchport trunk allowed vlan 20,100

switchport mode trunk

switchport voice vlan 100

mls qos trust cos

switchport portfast trunk

Also, put ip-default gateway on switch.


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