Virtual Circuits And Dlcis - Alcatel Omni Switch/Router User Manual

Virtual Circuits and DLCIs

Virtual Circuits and DLCIs
The supports Permanent Virtual Circuits (
WSX
Most service carriers do not currently offer
dynamic (learned). Static
and any configured Data
PVCs
with the Frame Relay network. Dynamic
by the Frame Relay network and not configured in advance. A logical Frame Relay
device like the
status through periodic Status updates from the Frame Relay network.
Each virtual circuit is locally defined by a Data Link Connection Identifier (
Relay network assigns the
numbers from 0 to 15 and 992 to 1023 are reserved for Control VCs. If you are using
DLCI
Annex A or Annex D as your
you are using the LMI Revision 1.0
.
DLCI 1023
numbers from 16 to 991 are reserved for Data VCs.
DLCI
You may have up to 256 virtual circuits and up to 128 virtual ports on a
A VC may or may not have the same
physical port contains three Frame Relay VCs on its local network with
these same VCs on the other side of the Frame Relay network might be 30, 31, and 32. The
two sets of
DLCIs
not be different.
At any one time, a virtual circuit will be active, inactive or deleted. If a virtual circuit is Active
it can transmit and receive data. If it is Inactive, the Frame Relay network still sees the virtual
circuit, but there is a problem with it and it is discarding data. If the virtual circuit is Deleted,
then the virtual circuit is not transmitting or receiving data and no
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are user-configured and consist of Management, or Control,
PVCs
s. Management VCs are used by the
PVC
does not create or control dynamic data VCs. It is only informed of their
WSX
and informs the
DLCIs
, the management control VC will be assigned DLCI 0. If
DLCMI
DLCMI
DLCI
are technically part of the same virtual circuits, but their values may or may
are only significant locally.
DLCIs
), but not Switched Virtual Circuits (
PVCs
. are either static (configured) or
SVCs PVCs
are usually data circuits, which are controlled
PVCs
about them.
WSX
, then the management control VC will be assigned
on each side of a
WAN
SVCs
to communicate
WSX
DTE
). The Frame
DLCI
.
WSX
link. For example, if a
WSX
16, 17, and 18,
DLCIs
exists for it.
DLCI
).