Ladies and Gents, morning.
My scenario is this I have 4610sw phones, avaya voip. They reside on vlan 1 pc are connected through the phone vlan 2. To allow this the switch port is trunked with dot1q for both vlans. The phones will be allocated a 172.x.x.x and the pc for the office a 192.x.x.x address. Both scopes are created and labbeled accordingly, on the same Windows 2000 box which is addressed and resides on the 192, vlan 2 its port is not trunked.
The problem is that the phone will always be goven a 192 address instead of 172. This then means it does nto work at all because of missing strings that it requires, option 176. I have stared at this many times and just cannot put my finger on whats going on. The Cisco 3550 switches have a dhcp helper added to vlan 1 to send traffic to the windows 2000 dhcp.
Any thought would be appreciated.
Benjamin
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Cheers for the reply,
I see what your saying and I agree as to the problem. When you say ensure both scopes are pointing to the correct valn what do you mean?
The vlan configuration is in line with Avaya's guide lines so I am not keen to change it as it would be a significant amount of work on the network to do this.
Ben
hey i see what is happening .....although you set up option 176 on the DHCP server you have to specify in the string what vlan the phones are using ...the phone will initially boot to the data vlan ....that is why it is getting the computer ip addresses.
Data string cyntax for SSON 176 for IP Phones using VLAN taggging (802.1Q/p)
Configure the data Vlan 176 option
L2QVLAN=vlan number for Voice Vlan subnet
Configure the voice vlan 176 option
MCIPADD=IP add clan1, clan2, clan3,
MCPORT= 1719
TFTPSRVR= IP add of TFTP server
VLANTEST=0
Dont enclose in " " or brackets and dont use spaces
exp. MCIPADD=x.x.x.x,MCPORT=171
hope this help
antonio
Business Accounts
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by: acheltenhamPosted on 2005-08-30 at 10:38:52ID: 14787065
Although in theory what you have there should work ....i would have used the pcs on vlan one and the phones on vlan 2. what i think is happening is that the dhcp sever is seeing the phones as the pc. thus i suggest looking at your dhcp setting again. make sure you have 2 scopes and the scopes pointing to the right vlans. also what ip addresses is the pc getting. hey wait a minute you have to set up the port the server is hooked up to see both vlans. do that first and see what happens.