User's Manual

RDL-3000 User Manual

TLS (Transparent LAN Services)

Extended TLS and Double Tagging

Fig. 19 displays an extension of this configuration in which the TLS is extended via the

Sector Controller and over the backbone to other locations. In order to keep the TLS

traffic separate from the rest of the network, the Sector Controller port for the TLS Group

is configured 'tagged' by a user-specified VID referred to in this example as TLS VID.

This solution allows unmodified traffic to be exchanged between Network B, Network C,

and a remotely located network called TLS Network. If Subscriber B receives a tagged

Ethernet packet from Network B, or Subscriber C receives a tagged Ethernet packet

from Network C, the packet will exit the Sector Controller port double-tagged (Q-in-Q).

When the Sector Controller receives a double-tagged packet from the TLS network that

is classified into the TLS Group, the outer tag is removed before the packet is forwarded

to Network B or C.

Fig. 19: PMP - Operation - TLS - Extended TLS and Double Tagging