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-rw-r--r--python/vyos/ifconfig/interface.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/python/vyos/ifconfig/interface.py b/python/vyos/ifconfig/interface.py
index 9b08d83de..7dbedea45 100644
--- a/python/vyos/ifconfig/interface.py
+++ b/python/vyos/ifconfig/interface.py
@@ -1375,7 +1375,7 @@ class Interface(Control):
# before mangling any IPv6 option. If MTU is less then 1280 IPv6 will be
# automatically disabled by the kernel. Also MTU must be increased before
# configuring any IPv6 address on the interface.
- if 'mtu' in config:
+ if 'mtu' in config and dict_search('dhcp_options.mtu', config) == None:
self.set_mtu(config.get('mtu'))
# Only change IPv6 parameters if IPv6 was not explicitly disabled