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authentication-key (Protocols IS-IS)



Hierarchy Level

Release Information

Statement introduced before Junos OS Release 7.4.

Statement introduced in Junos OS Release 9.0 for EX Series switches.

Statement introduced in Junos OS Release 12.1 for the QFX Series.

Statement introduced in Junos OS Release 14.1X53-D20 for the OCX Series.


Authentication key (password). Neighboring routing devices use the password to verify the authenticity of packets sent from this interface. For the key to work, you also must include the authentication-type statement.

All routing devices must use the same password. If you are using the Junos OS IS-IS software with another implementation of IS-IS, the other implementation must be configured to use the same password for the domain, the area, and all interfaces adjacent to the Juniper Networks routing device.


If you do not include this statement and the authentication-type statement, IS-IS authentication is disabled.


key—Authentication password. The password can be up to 1024 characters long. Characters can include any ASCII strings. If you include spaces, enclose all characters in quotation marks (“ ”).


A simple password for authentication is truncated if it exceeds 254 characters.

Required Privilege Level

routing—To view this statement in the configuration.

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