Accessing the ATM Connections Window 7-3
ATM Configuration
Settings
The Settings portion of the window contains a list box which displays information about
each of the currently configured PVCs, as well as the fields used to configure new
connections:
I/F The device interface on which the PVC was configured.
VPI Displays the Virtual Path Identifier assigned to the connection;
current versions of HSIM-A6DP firmware allow values from
0-3. Virtual Path Identifiers are used to group virtual
connections, allowing for channel trunking between ATM
switches. Each VPI can be configured to carry many different
channels (designated by VCIs) between two points.
VCI Displays the Virtual Channel Identifier assigned to the
connection; allowable values are 0-1023 for each VPI. Each
assigned VCI must be unique within its defined VPI: for
example, you can assign a VCI of 14 as many as four times:
once with a VPI of 0, once with a VPI of 1, and so on.
Remember, it is the combined VPI and VCI designations
assigned to a channel that creates the grouping of virtual
connections.
Encapsulation Type Displays the method used to encapsulate LAN packets on the
selected circuit. Current versions of HSIM-A6DP firmware use
802.3 VC-based multiplexing for bridging protoco ls
(designated VC MUX 802.3 Bridged); future versions will add
support for ATM Forum LAN Emulation and Enterasys’
SecureFast Switching. You may also see some connections
assigned a type of “other”; these are default connections that
cannot be modified or deleted.
Status Displays the current administrative status of the connection:
enabled or disabled. In current versions of firmware, all
connections are enabled by default, and cannot be disabled.
UpTime The length of time the selected connection has been enabled.
Add
Selecting the Add button either adds a new connection or modifies an e x isting one, using
the parameters entered in the fields below the list box. A confirmation window will appear
for both additions and modifications.
Delete
Selecting the Delete button deletes the selected connection; a confirmation window
requires that you confirm the deletion.
Refresh
Selecting Refresh refreshes the connection information displayed in the window.