MTU/Path MTU/Black Hole-All you need to know
NOTE:-Layer 2 switch cannot fragmenr ip header information-Layer3
if it gets packets more than MTU then it will drop the packets.
Path MTU Discovery: TYPE-3 CODE-4
=============
PC1(1500)------>(1500)Router(500)------------->(1500)PC2
black hole:TYPE-3 CODE-4
======================
PC(1500,1460)------>(1500,1460)R1(1500,1460)------------->(1500,1476)R2(1500)---------PC2
<-------------------dest-unreachable-frag needed-------
destination unreachable fragmentation needed packet capture:-
------------------------------------------------------------ -----------
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