METRODATA LTD
WCM1100 / WCM3100 / WCM-Serial
Quick Start Guide
76-02-082 Rev D
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2.3 VLAN Trunk Mode
In this mode, both WCM units have VLAN support enabled, and all ports are defined as
access ports VLAN 101 is used as the management VLAN and in unit WCM1100-A the
VLAN group 101 includes the LAN Port 1, the Manager and the PDH WAN port. At the
remote end, The SFP port is disabled to prevent customer access to the WCM manager.
2.4 S-Tag Mode
In this mode, the WCM adds a, port based, S-TAG to all incoming traffic. Where customer
traffic is already VLAN tagged, this leads to double tagging or ‘QinQ’ operation. The use
of the S-TAG enables the carrier to isolate customer traffic. Carrier management traffic is
carried with a separate S-Tag giving management access to both units, and on the
customer site the external management access is disabled.
