- Bronze, 100 points or more
hi every body!
I read in cisco book that maximum size for ethernet frame is 1518 byte.
My question is why? it should be larger than 1518 because:
IEEE ethernet(802.3) header= upto 28 bytes
IEEE 802.3 with snap= upto 35 bytes.
If we use any ethernet standard with mtu=1500, it would be above 1518 bytes.
have a nice day!
The Ethernet frame size will remain the same i.e. 1518 unless they are configured( ex vlan tagging) to understand frames gt > 1518
You cannot mix match different ethernet headers.Generally,when use different ethernet headers, MTU for the ethernet layer reduces below 1500.
Support for frame size gt>1518 are highly vendor/implementation specific.
Good info on different types of Ethernet frame formats