ATM Configuration

VPI

Displays the Virtual Path IdentiÞer assigned

 

 

to the connection. Virtual Path IdentiÞers are

 

used to group virtual connections, allowing

 

for channel trunking between ATM switches.

 

Each VPI can be conÞgured to carry many

 

different channels (designated by VCIs)

 

between two points.

VCI

Displays the Virtual Channel IdentiÞer

 

assigned to the connection; allowable values

 

are 0 - 1023 for each VPI. 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 ATM BRIM Þrmware use 802.3

 

VC-based multiplexing for bridging

 

protocols (designated VC MUX 802.3

 

Bridged); future versions will add support

 

for ATM Forum LAN Emulation and

 

CabletronÕs SecureFast Switching. You may

 

also see some connections assigned a type of

 

ÒotherÓ; these are default connections that

 

cannot be modiÞed or deleted.

Status

Displays the current administrative status of

 

the connection: Enabled or Disabled. For

 

current versions of Þrmware, all connections

 

are enabled by default, and cannot be

 

disabled.

UpTime

Displays the length of time the connection

 

has been enabled.

Configuring Connections

You can use the command buttons (Add, Delete or Refresh) at the bottom of the Current ATM Connections window to add, modify or delete a Permanent Virtual Circuit (PVC) or refresh the window.

Add

Adds a new connection or modiÞes an

 

existing one, using the parameters entered in

 

the Þelds below the list box. A conÞrmation

 

window will appear for additions and

 

modiÞcations.

Configuring Connections

5-3

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Cabletron Systems 2.2 manual Configuring Connections, Vpi