<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
<font face="Tahoma">Hi all.<br>
<br>
When I add my Loopback interface to isisd.conf and restart it, it
throws the below:<br>
<br>
2020/04/07 14:35:44 errors: ISIS: libyang: Missing required
element "area-tag" in "isis".
(/frr-interface:lib/interface[name='lo0'][vrf='default']/frr-isisd:isis)<br>
2020/04/07 14:35:44 warnings: ISIS: [EC 100663337]
nb_candidate_commit_prepare: failed to validate candidate
configuration<br>
% Configuration failed: validation error.<br>
<br>
A bit of Googling indicated that "router isis 1" would need to
come first in the configuration, since some previous versions of
FRR processed the files line by line, and not atomically. But even
after doing that, I still get the same error; but get this, ONLY
when I add "interface lo0" to the configuration. Without that, and
with just the physical interface in the configuration, IS-IS
starts up fine.<br>
<br>
Any thoughts?<br>
<br>
System FRR 7.3 on FreeBSD-12.1. Thanks.<br>
<br>
Mark.<br>
</font>
</body>
</html>