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If the same authentication type and password are not configured across the area, IS-IS<br />

cannot establish adjacencies and you will see errors. Here, Level 2 authentication is<br />

configured on RouterH but not on RouterG:<br />

aviva@RouterH> show isis adjacency extensive<br />

RouterG<br />

Interface: fe-0/0/1.0, Level: 2, State: Down, Expires in 0 secs<br />

Priority: 64, Up/Down transitions: 2, Last transition: 00:00:37 ago<br />

Circuit type: 3, Speaks: IP, IPv6, MAC address: 0:5:85:c2:2e:d1<br />

Topologies: Unicast<br />

Restart capable: Yes<br />

LAN id: RouterH.02, IP addresses: 10.0.1.2<br />

Transition log:<br />

When State Event Down reason<br />

Tue Jun 21 19:51:33 Up Seenself<br />

Tue Jun 21 23:51:01 Down Error Bad Hello<br />

RouterA<br />

Interface: fe-1/0/1.0, Level: 1, State: Up, Expires in 7 secs<br />

Priority: 64, Up/Down transitions: 1, Last transition: 21:37:54 ago<br />

Circuit type: 1, Speaks: IP, IPv6, MAC address: 0:5:85:ca:e7:d0<br />

Topologies: Unicast<br />

Restart capable: Yes<br />

LAN id: RouterA.02, IP addresses: 10.0.24.2<br />

Transition log:<br />

When State Event Down reason<br />

Tue Jun 21 02:13:44 Up Seenself<br />

For tighter security, you can also define separate authentication passwords for the<br />

IS-IS Hello packet exchanges on interfaces. The following commands set the hello<br />

password on interface fe-0/0/1:<br />

[edit protocols isis interface fe-0/0/1.0]<br />

aviva@RouterG# set level 2 hello-authentication-type md5<br />

aviva@RouterG# set level 2 hello-authentication-key $NutherPaSSwd<br />

11.8 Redistributing Static Routes into IS-IS<br />

Problem<br />

You have a single, low-speed link to a small customer and instead, of having the customer<br />

run IS-IS (or even RIP), you want to set up a static route to the customer.<br />

Solution<br />

Create a routing policy to redistribute static routes into IS-IS:<br />

[edit policy-options]<br />

aviva@RouterG# set policy-statement export-statics term 1 from protocol static<br />

aviva@RouterG# set policy-statement export-statics term 1 then accept<br />

aviva@RouterG# show<br />

policy-statement export-statics {<br />

term 1 {<br />

368 | Chapter 11: IS-IS<br />

This is the Title of the Book, eMatter Edition<br />

Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved.

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