Multiple site VLAN issue

[a10ecun]

Does anyone know if there is a way to specify different VLAN ID's in option 156? Currently working on an install that includes 3 buildings connected by fiber. Each building is being configured as separate sites. Single DHCP server located at the main site. Separate VLANs have been created for each site.
Te problem we are experiencing is that when the phones initially boot up, they hit the data network and pull the configuration settings in option 156 which only specifies a single VLAN. If the phones are at a site not specified, the switch will not recognize the VLAN ID being requested when they reboot.

Thanks,

[tnshurtm]

Does the single dhcp server only have one ip pool? or does each vlan have its own pool?

[a10ecun]

Each VLAN has its own pool. There in lies the issue as the switches at each site are configured for the appropriate VLAN but the ID in option 156 is not the appropriate number for the site.

[luckycharms]

Option 156 can only be configured with (1) VLAN option in the scope. Why does each building need its own VLAN ID? Since each building is connected, I would just use one VLAN ID. Keep things simple.

[tnshurtm]

Multiple pools in one scope? or multiple scopes? Can't you have the option 156 different for each scope?

[luckycharms]

You are correct tnshurtm. If their are separate scopes then their can be separate 156 options with different VLAN ID's.

[a10ecun]

All resolved for now. Ended up placing all in the same site. Was setting up different sites due to each building being a seperate line of business requiring seperate MOH and paging zones. Have not worked out all of the bugs yet but think it is doable as a single site.

Thanks