Eric Stewart: Running Off At The Mouth

CCIE Studies: IS-IS Lab Notes

by Eric Stewart on Mar.22, 2015, under Networking, Technology

Ran into a couple of things today and wanted to spell out (mainly for myself) what the errors really mean:

R6(config-router)#passive-interface default
ISIS: can not make last active ISIS-IP interface passive

You probably have an interface explicitly configured with an “ip router isis” command.

R6(config-router)#passive-interface default 
%Invalid command if CLNS-only

Oddly enough this is complaining that there isn’t an interface configured for IS-IS routing.  Thing is, you’ll get the previous error in many cases.  I haven’t figured it out yet, because I’ll go from the second error, put an interface in “ip router isis”, and the get the first error, then take the “ip router isis” out of the interface, and then successfully make all interfaces passive by default.

Also, if you have “passive-interface default” set, entering “ip router isis” for an interface also automatically appears to put in a “no passive-interface” command for the interface in question under “router isis”.

:, ,

Hi! Did you get all the way down here and not find an answer to your question? The two preferred options for contacting me are:
  • Twitter: Just start your Twitter message with @BotFodder and I'll respond to it when I see it.
  • Reply to the post: Register (if you haven't already) on the site, submit your question as a comment to the blog post, and I'll reply as a comment.

Leave a Reply

You must be logged in to post a comment.