Configuring Guidelines for Frame Relay Pass-Through

The following general guidelines should be kept in mind when attaching a third-party FRAD to the Passport 4400:

• There is a maximum of 64 frame relay connections that may be configured on a Passport 4400.
• The examples in this topic use Port 1 on the base module as the frame relay DCE port. If you wish to configure the ports on the base module differently, see Managing Primary and Backup Ports.
• The local DLCI number must match the PVC DLCI as seen by the FRAD attached to the frame relay DCE port on the Passport 4400.
• The attached FRAD normally should be configured for DTE.
• If the physical port is set to DCE, the Passport 4400 generates clocking; if the port is set to DTE, the Passport 4400 accepts the clock from the FRAD. Note that DCE and DTE refer to the physical function of the port on the Passport 4400; the logical function is still frame relay DCE.

Note: Port 1 can usually be configured for DTE, if necessary. However, if there is a supported interface module installed in Port 3 on the base module, Port 1 cannot be configured for DTE.

Configuring Frame Relay Pass-Through