Technical Documentation



default-chap-secret name;

Hierarchy Level

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

Release Information

Statement introduced in JUNOS Release 8.0.


Define the default CHAP secret to be used when no matching CHAP access profile exists.

For ATM2 IQ interfaces only, you can configure a default CHAP secret on the 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.


If you do not include the default-chap-secret statement in the configuration, and an interface receives a CHAP challenge or response from a peer that is not in the applied access profile, the link is immediately dropped.

Required Privilege Level

interface—To view this statement in the configuration.

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

Published: 2010-04-20