I'm currently facing a tough challenge. We have built the following: Mitel 3300 ICP with 5212 IP phones on an HP ProCurve layer 3 PoE switch. On the switch, we made two VLAN's (VLAN 1 for data, VLAN 2 for voice), of which the second has tagged ports for QoS. The PC's are physically linked by the phones, acting as a hub for interconnectivity.
When rebooting the phones, and thus requesting for DHCP scope, this is not functioning (reject 1 thru 10). The PC's do get a correct IP address. After untagging the ports in VLAN 2, DHCP was working properly. This situation, however, is not helping anyway, since tagged ports are necessary for QoS purposes.
Investigation shows that the phones send untagged packets when requesting DHCP, this is fixed in the firmwear of the phones.
Can anyone provide new insights on this please?
Johan, project leader