From 84a429b41175b95634ec9492e0cf3a564a47abdd Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Mon, 6 Sep 2021 21:17:42 +0200
Subject: ifconfig: T3806: "ipv6 address no_default_link_local" required for
 MTU < 1280

This commit also extends the smoketest to verify that the exception for this
error is raised.
---
 smoketest/scripts/cli/base_interfaces_test.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'smoketest')

diff --git a/smoketest/scripts/cli/base_interfaces_test.py b/smoketest/scripts/cli/base_interfaces_test.py
index edb604dbf..6a5b9c4ee 100644
--- a/smoketest/scripts/cli/base_interfaces_test.py
+++ b/smoketest/scripts/cli/base_interfaces_test.py
@@ -246,11 +246,19 @@ class BasicInterfaceTest:
             for intf in self._interfaces:
                 base = self._base_path + [intf]
                 self.cli_set(base + ['mtu', self._mtu])
-                self.cli_set(base + ['ipv6', 'address', 'no-default-link-local'])
 
                 for option in self._options.get(intf, []):
                     self.cli_set(base + option.split())
 
+            # check validate() - can not set low MTU if 'no-default-link-local'
+            # is not set on CLI
+            with self.assertRaises(ConfigSessionError):
+                self.cli_commit()
+
+            for intf in self._interfaces:
+                base = self._base_path + [intf]
+                self.cli_set(base + ['ipv6', 'address', 'no-default-link-local'])
+
             # commit interface changes
             self.cli_commit()
 
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