keepalives

Syntax


                        
                           keepalives <interval seconds> <down-count number> <up-count number>;

Hierarchy Level


                        
                           [edit interfaces interface-name],
                           
                           [edit interfaces interface-name unit logical-unit-number],
                           
                           [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number]

Release Information

Statement introduced before JUNOS Release 7.4.

Description

Enable the sending of keepalives on a physical interface configured with PPP, Frame Relay, or Cisco HDLC encapsulation.

For ATM2 IQ interfaces only, you can enable keepalives on a logical interface unit if the logical interface is configured with one of the following PPP over ATM encapsulation types:

atm-ppp-llc—PPP over AAL5 LLC encapsulation.
atm-ppp-vc-mux—PPP over AAL5 multiplex encapsulation.

Default

Sending of keepalives is enabled by default. The default keepalive interval is 10 seconds for PPP, Frame Relay, or Cisco HDLC. The default down-count is 3 and the default up-count is 1 for PPP or Cisco HDLC.

Options

down-count number—The number of keepalive packets a destination must fail to receive before the network takes down a link.
interval seconds—The time in seconds between successive keepalive requests.
up-count number—The number of keepalive packets a destination must receive to change a link’s status from down to up.

Usage Guidelines

See Configuring Keepalives or Configuring Frame Relay Keepalives.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.