METRODATA LTD
WCM1100 / WCM3100 / WCM-Serial
Quick Start Guide
76-02-082 Rev D
39 of 75
4.2.1.11 VLAN ID
If the Traffic Isolation mode is set to VLAN then the LAN port may be configured as either
ACCESS, or TRUNK.
A port is configured as an Access Port if it is assigned to a VLAN, ie given a VLAN ID
between 1 and 4095. All frames ingressing this port will have a VLAN Tag added, and on
egress will have the tag removed. This configuration item defines the VLAN ID which will
be added and may be in the range (1 to 4095 ). One or more ports may be assigned to the
same VLAN and packets will then only switch between those ports and trunk ports.
A port is configured as TRUNK, if the VLAN ID 0 or none is selected. In this case frames
ingress, or egress, with tags unchanged. A trunk is assumed to be a member of all VLANs
4.2.1.12 QinQ S-TAG ID
If the Traffic Isolation mode is set to QinQ then the LAN port may be assigned provider
mode Service Tag, S-TAG. and all frames ingressing this port will have the S-Tag added.
This configuration item defines the S-TAG ID which will be added and may be in the range
(1 to 4095 ). One or more ports may be assigned the same S-TAG and packets will then
only switch between those ports and the WAN interface.
In QinQ mode, ingress packets may be tagged or untagged and all will have a single S-
TAG stripped before egress.
4.2.1.13 default Priority
When the traffic isolation mode is VLAN, this is the priority value that is added with the
VLAN ID during ingress at an Access Port. In QinQ mode, untagged packets are given
this default priority, whilst tagged packets promote the C-TAG priority to the S-TAG
priority.
