466 Appendix B 802.1Q VLAN descriptionEnhanced DATA VLANEnhancements for DATA (PC Port) VLAN for the IP Phone include thefollowing• DATA (PC Port) VLAN packet handling— PC Port (Ingress direction)— PC Port (Egress direction)• DATA (PC Port) VLAN Tag StrippingDATA (PC Port) VLAN packet handlingPackets processed to and from the PC port operate as followsPC Port (Ingress direction)• DATA VLAN disabled—all traffic received on the PC port is switchedbased on MAC address. The packets are not modified in any way.• DATA VLAN enabled—all untagged packets received on the PC porthave the 802.1Q header appended and the VLAN ID is set to the valuethat was manually configured in the Data VLAN field. Any packet arrivingon the PC port that is already tagged is dropped.PC Port (Egress direction)• DATA VLAN disabled—all traffic received on the PC port has the 802.1Qheader appended and the VLAN ID is set to the value which wasmanually configured in the DATA VLAN field. Any packet arriving on thePC port which is already tagged is dropped.• DATA VLAN enabled—all traffic is forwarded to the PC port based ona review of the MAC address and the 802.1Q value that was manuallyconfigured in the DATA VLAN field. Traffic is forwarded out the PC portonly if the packets contain the DATA VLAN tag. Untagged traffic andtraffic without the DATA VLAN tag is dropped.DATA (PC Port) VLAN Tag StrippingDATA VLAN Tag Stripping can be configured in the Network Configurationmenu. To enable DATA VLAN Tag Stripping, select the PC-Port UntagAll check box, DATA VLAN Tag Stripping can be enabled or disabledindependent of enabling VLAN support on the PC Port.If the DATA VLAN Tag Stripping is disabled, the packet is sent to the PC Portunmodified. If the DATA VLAN Tag Stripping is enabled, the 802.1Q headerif one exists, is removed from the packet before the packet is forwardedto the PC port.Nortel Communication Server 1000IP Phones FundamentalsNN43001-368 02.01 StandardRelease 5.0 7 December 2007Copyright © 2003–2007, Nortel Networks.
