This section discusses L2 MTU as it relates to Cisco and 2.1.a (iii) L2 MTU. Recall in the parent section that we showed the total size of an Ethernet frame (and in 1.1.d we even discused it more). Well the L2 MTU is is general this: IP packet (1500) Ethernet src+dst+ethertype+fcs+(optional .1q) = 18-22 bytes …