IP Office 1608 DHCP VLAN problems

[rsouthgate]

Hi,

I have recently switched our network so that the phones are now running on a separate VLAN. The phones themselves can use the VLAN and connect properly when set manually, but after rebooting the system, they seem to struggle to connect to the IP Office when using DHCP.

The phones just sit at Finding router..... or the 96xx series we have a couple of sit at discover... I don't understand why.

The phones get the initial VLAN info from a windows DHCP server, this switches them to the voice vlan for DHCP from the IP office itself. They appear to get the dhcp from it, but can't register to it. After a period of time (I left them overnight), they had all registered, but not sure why it is taking them so long to do so.

Any ideas?

[furrerm]

Are you using the IPO as the DHCP server?
If so I am assuming that you have an IP in the DHCP router field.

There is no need for the router IP, as your pones are on an isolated network. So remove the router IP entry for DHCP, and see if that changes things.

[rsouthgate]

Yes I do have the router option in there, but this was happening even without it. If this was really the problem I would expect the phone to never register with the IP office. Disabling the boot option and setting the phones manually to the voice vlan works fine, but for some reason, it won't work in the DHCP 242 option.

[furrerm]

YOu have a route in there IPO, i assume it is a default route..
Do you have a route specific to your VLAN in ther IPO as well as the default?