From 19b16986515dcb58955e153025b24dc012faa574 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Sun, 21 Mar 2021 18:27:36 +0100
Subject: isis: T3417: last byte of IS-IS network entity title must always be 0

---
 src/conf_mode/protocols_isis.py | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src')

diff --git a/src/conf_mode/protocols_isis.py b/src/conf_mode/protocols_isis.py
index 530f55ce4..adce00ee3 100755
--- a/src/conf_mode/protocols_isis.py
+++ b/src/conf_mode/protocols_isis.py
@@ -89,6 +89,11 @@ def verify(isis):
     if 'net' not in isis:
         raise ConfigError('Network entity is mandatory!')
 
+    # last byte in IS-IS area address must be 0
+    tmp = isis['net'].split('.')
+    if int(tmp[-1]) != 0:
+        raise ConfigError('Last byte of IS-IS network entity title must always be 0!')
+
     # If interface not set
     if 'interface' not in isis:
         raise ConfigError('Interface used for routing updates is mandatory!')
-- 
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