What's the difference between MTU and IP MTU on Tunnel Interfaces?
When i configure a GRE Tunnel the "int tu0" shows MTU 1514. By Default the IP MTU of this Tunnel is 24 Byte less than the physical interface IP MTU (whitch means the "next hop" Serial i.e.(?), so the GRE interface MTU is 1476. When i want to set the Tunnel MTU to 1500 (to avoid fragmentation) i only set Serial interface MTU to 1524 an GRE Tunnel IP MTU to 1500. The "int tu0" still shows MTU 1514. Do i have to increase also the MTU of this Tunnel interfaces?
Re: What's the difference between MTU and IP MTU on Tunnel Inter
I'm not crossing a public network, just a Serial-to-Serial WAN where i have increased the MTU to 1524 Byte. My problem is to find the difference between the 'MTU' an the 'IP MTU' of an Tunnel interface?
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