All about MTU and Fragmentation.

Topology

So, in this post we will cover the mtu and fragmentation cases. So, every interface/port have its capacity to send data across the line or port. So, the Maximum transfer unit (MTU).

When I say MTU it usually means at layer 2 frame, but the actual data formation take place at layer 3. So, we have MTU at layer 2 and IP MTU at layer 3.

Bydefault the value of IP MTU is same as MTU, if not defined explicitly. MTU of port may varies depending on the platform or vendor. By default, most of the nodes support 1500 bytes of MTU.

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