FREEK Frame Relay End To End Keepalive

frame-relay end-to-end keepalive mode

To enable Frame Relay end-to-end keepalives, use the frame-relay end-to-end keepalive mode map-class configuration command. To disable Frame Relay end-to-end keepalives, use the no form of this command.

frame-relay end-to-end keepalive mode {bidirectional | request | reply | passive-reply}

no frame-relay end-to-end keepalive mode

Syntax Description

bidirectional	Enables bidirectional mode.
request	Enables request mode.
reply	Enables reply mode.
passive-reply	Enables passive reply mode.

Defaults

When a Frame Relay end-to-end keepalive mode is enabled, default values depend on which mode is selected. For the meaning of the parameters, see the frame-relay end-to-end keepalive timer, frame-relay end-to-end keepalive event-window, frame-relay end-to-end keepalive error-threshold, and frame-relay end-to-end keepalive success-events commands.

Command Modes

Map-class configuration

Command History

Release	Modification
12.0(5)T	This command was introduced.

Usage Guidelines

To enable Frame Relay end-to-end keepalives, Frame Relay must be configured. In addition, a map-class must be associated and a DLCI assigned to an interface, subinterface, VC or PVC. For more information on associating a frame-relay class with an interface, subinterface, VC or PVC, see the frame-relay class command. For more information on assigning a DLCI to an interface, subinterface, VC or PVC, see the frame-relay interface-dlci command.

In bidirectional mode, both ends of a virtual circuit (VC) send keepalive requests and respond to keepalive requests. If one end of the VC is configured in the bidirectional mode, the other end must also be configured in the bidirectional mode.

In request mode, the router sends keepalive requests and expects replies from the other end of the VC. If one end of a VC is configured in the request mode, the other end must be configured in the reply or passive-reply mode.

In reply mode, the router does not send keepalive requests, but waits for keepalive requests from the other end of the VC and replies to them. If no keepalive request has arrived within the timer interval, the router times out and increments the error counter by 1. If one end of a VC is configured in the reply mode, the other end must be configured in the request mode.

In passive-reply mode, the router does not send keepalive requests, but waits for keepalive requests from the other end of the VC and replies to them. No timer is set when in this mode, and the error counter is not incremented. If one end of a VC is configured in the passive-reply mode, the other end must be configured in the request mode