ZyXEL Communications SLC1224, User Manual

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SLC1224 User’s Guide
Chapter 3 G.SHDSL Port Setup 37
3.7.2 LLC
LLC is a type of encapsulation where one VC (Virtual Circuit) carries multiple protocols with
each packet header containing protocol identifying information. Despite the extra bandwidth
and processing overhead, this method may be advantageous if it is not practical to have a
separate VC for each carried protocol, for example, if charging heavily depends on the number
of simultaneous VCs.
3.7.3 VC Mux
VC Mux is a type of encapsulation where, by prior mutual agreement, each protocol is
assigned to a specific virtual circuit, for example, VC1 carries IP, VC2 carries IPX, and so on.
VC-based multiplexing may be dominant in environments where dynamic creation of large
numbers of ATM VCs is fast and economical.
3.7.4 Virtual Channel Profile
Virtual channel profiles allow you to configure the virtual channels efficiently. You can
configure all of the virtual channels with the same profile, thus removing the need to configure
the virtual channels one-by-one. You can also change an individual virtual channel by
assigning it a different profile.
The SLC provides two default virtual channel profiles: DEFVAL (for LLC encapsulation) and
DEFVAL_VC (for VC encapsulation). By default, all virtual channels are associated to
DEFVAL .
3.8 DSL Port Channel Setup
Do the following to open a port’s Channel Setup screen:
1
Click an DSL port's index number in the Port Setup screen to go to the Edit Port Setup
screen.
2
Click Channel Setup in the Edit Port Setup screen to go to the Channel Setup screen.
This screen is a summary screen that displays read-only information about the DSL port’s
VPI/VCI settings.