From: Marvin Greenlee (marvingreenlee@yahoo.com)
Date: Wed Jun 09 2004 - 17:23:20 GMT-3
Yes, you can use different DHCP servers for different
VLANs.
The IP helper address is used for forwarding broadcast
traffic to a DIFFERENT subnet. If the server is on
the same subnet, the server will reply to the DHCP
request on it's own, and you don't need the helper
address command. By having the phones on a different
VLAN, you can use a different DHCP server by
configuring the ip helper address (if necessary) for
the VLAN where the phones are.
Marvin Greenlee, CCIE #12237
Network Learning, Inc.
marvin@ccbootcamp.com
--- Ahmed Mustafa <ahmed.mustafa@sbcglobal.net> wrote:
> Is it possible to support two DCHP servers, one for
> voice (IP Phones) and and
> one for Data (computer connected through IP Phone).
>
>
> For example,
>
> Data Vlan: 10.1.1.0/24-------------------> VLAN 10
>
> Voice Vlan: 172.16.10.0/24--------------> VLAN 16
>
> DHCP server for Data 10.1.1.5
> DHCP server for Voice: 172.16.10.5
>
> 3550 connected to IP Phones
>
> interface fastethernet 0/1
> switchport voice vlan 16
> swithcport access vlan 10
>
-----------------------------------------------------
>
> 3550 Connected to 6509(Router on stick) connected to
> 7500 router.
>
>
> 7500 Configuration:
>
> interface fastethernet 0/0.1
> encapsulation dot1q 10
> ip address 10.1.1.1 255.255.0.0
> ip helper-address 10.1.1.5
>
> interface fastethernet 0/0.2
> encapsulation dot1q 16
> ip address 172.16.10.1 255.255.0.0
> ip helper-address 172.16.10.5
>
> ----------------------------------------------------------------------
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This archive was generated by hypermail 2.1.4 : Sat Jul 03 2004 - 19:40:36 GMT-3