[asterisk-users] Polycom IP 330 w/VLAN?

[Noah Miller]

Hi James -

>  The VLAN used by the phone can be configured in several ways:
>
>  1. Hard-code it on the phone. Not recommended if you have lots of phones.
>  2. Auto-discovery using CDP. Requires Cisco or older HP switches.
>  3. Auto-discovery using DHCP. Disabled by default in SIP 2.1.x.
>
>  We use the third option. The phone first does DHCP on the default VLAN
>  (since it does not yet know which VLAN to use). The DHCP server sends
>  back the VLAN to use, which cause the phone to send a DHCP release,
>  reconfigure itself for the new VLAN, and do DHCP again on the new
>  VLAN. We use this method because we have newer HP switches that have
>  removed CDP support in favor of LLDP, which Polycom does not (yet?)
>  support.

Hey, thanks!  I just learned something new.  I've been doing untagged
VLANs with them because they don't properly support CDP.  Now I can
get that extra port back for computers.  What's the DHCP option you
use to send the VLAN info?

Thanks,
Noah