Configuring SNA Services

To initiate the SNA services, you must configure one or more of the following items:

• To connect the Passport 4400 unit to an SNA SDLC network, you must configure one or more physical ports on the unit for SDLC service.
• To connect the unit to an Ethernet and carry SNA over LLC2, you must configure the unit's Ethernet port for LLC2 service.
• When connectivity to a remote destination is required, you must establish a virtual circuit:
• To connect to a device on another Passport 4400 unit, use an SVC.
• To connect across a network with a Passport 6400 unit, use an SPVC.
• To connect to a remote FRAD, use a PVC.
• If the Passport 4400 unit is used for switching SNA data between local ports only, you do not need to configure an SVC, SPVC, or PVC.

For SNA calls destined for a remote host located across the WAN, you must establish an SVC, SPVC, or PVC connection (depending on whether the remote device is a Passport 4400 unit, a Passport 6400 unit, or a FRAD). You need to establish one SVC, SPVC, or PVC between the two end points. Multiple SNA sessions destined for the same remote device are carried across this single virtual circuit. If a connection is required to a second, different remote device, then you must configure a second virtual circuit (SVC, SPVC, or PVC). Once the virtual circuits are setup, SNA calls can be carried across the WAN.