Nortel 1110 User Guide

Appendix B: 802.1Q VLAN description

553-3001-368 Standard 26.00 August 2007

DATA (PC Port) VLAN packet handling

Packets processed to and from the PC port operate as follows:

–

DATA VLAN disabled—all traffic received on the PC port is 
switched based on MAC address. The packets are not modified 
in any way.

–

DATA VLAN enabled—all untagged packets received on the 
PC port have the 802.1Q header appended and the VLAN ID is 
set to the value that was manually configured in the Data VLAN 
field. Any packet arriving on the PC port that is already tagged 
is dropped.

–

DATA VLAN disabled—all traffic received on the PC port has 
the 802.1Q header appended and the VLAN ID is set to the 
value which was manually configured in the DATA VLAN 
field. Any packet arriving on the PC port which is already 
tagged is dropped.

–

DATA VLAN enabled—all traffic is forwarded to the PC port 
based on a review of the MAC address and the 802.1Q value 
that was manually configured in the DATA VLAN field. Traffic 
is forwarded out the PC port only if the packets contain the 
DATA VLAN tag. Untagged traffic and traffic without the 
DATA VLAN tag is dropped.

DATA VLAN Tag Stripping can be configured in the Network Configuration 
menu. To enable DATA VLAN Tag Stripping, select the PC-Port Untag All 
check box, DATA VLAN Tag Stripping can be enabled or disabled 
independent of enabling VLAN support on the PC Port.

If the DATA VLAN Tag Stripping is disabled, the packet is sent to the PC 
Port unmodified. If the DATA VLAN Tag Stripping is enabled, the 802.1Q 
header if one exists, is removed from the packet before the packet is 
forwarded to the PC port.