configure isis password vlan

configure isis [vlan all | {vlan} vlan_name] password [none | encrypted simple encrypted_password | simple { password }] [level [1|2]]


This command sets or clears the authentication password for one or all IS-IS VLAN (Virtual LAN)s.

Syntax Description

vlan all Applies the password configuration to all IS-IS VLANs.
vlan_name Specifies a single VLAN to which the password configuration is applied.
none Clears the password configuration and disables hello PDU authentication.
encrypted Specifies that the supplied password is encrypted and must be decrypted prior to using it in a TLV.
password Specifies the password. Passwords may be up to 254 alphanumeric characters in length.
level [1 | 2] Limits the password configuration to level 1 or level 2. If neither level 1 or level 2 is specified, the configuration applies to both levels.



Usage Guidelines

If configured, the specified password is included in Hello PDUs for the specified level. In addition, received Hello PDUs on the specified interface are authenticated with the same password. Hello PDUs that are not authenticated are discarded.

Only plain text passwords are supported. Note that if the password is changed on an interface with an existing adjacency, the neighboring router needs to be configured as well. Depending on how timers are configured, the adjacency may time out while transitioning between passwords. Although passwords appear in plain text during configuration, they are displayed and saved in encrypted form.


The following command assigns password Extreme to all level 1 VLANs configured for IS-IS:

configure isis vlan all password simple Extreme level 1


This command was first available in ExtremeXOS 12.1.

Platform Availability

This command is available on platforms with a Core license.