Using the tunnel path mtu-search command

Hello world

Need to know why to use the tunnel-search path mtu command--if we have the GRE tunnels at both ends?

Also the same command can be used if we have GRE over IPSEC VPN?

Thank you

MAhesh

You can read the description here:

http://www.Cisco.com/en/us/docs/iOS-XML/iOS/interface/command/IR-T2.html#GUID-3B831D75-DAD0-472A-AC32-A6A066F71C33

It forces unattainable sending should exceed US MTU, rather the fragmentation occurs.

And Yes, it applies to GRE over IPsec and is quite a good feature in most cases.

Tags: Cisco Security

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