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Configuring IP-IP Path MTU Discovery

By default, path maximum transmission unit (MTU) discovery on outgoing IP-IP tunnel connections is disabled. To enable IP-IP path MTU discovery, include the ipip-path-mtu-discovery statement at the [edit system internet-options] hierarchy level:



[edit system internet-options] 

ipip-path-mtu-discovery;

To disable IP-IP path MTU discovery, include the no-ipip-path-mtu-discovery statement at the [edit system internet-options] hierarchy level:



[edit system internet-options] 
no-ipip-path-mtu-discovery;

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