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MTU size > 1500?
johnifanx98
Member Posts: 329
in CCNA & CCENT
Many times I see in the text book saying MTU =1500. However, in a 1Gbps network I often see frames of several KB or even tens of KB in the wireshark captured data. Does it mean the MTU could be much bigger in 1 high speed LAN?
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networker050184
Mod Posts: 11,962 Mod
Yes the maximum MTU is configurable, but the default is 1500 for ethernet and you can run into fragmentation issues if you are not careful when changing it.An expert is a man who has made all the mistakes which can be made. -
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Balantine
Member Posts: 77 ■■□□□□□□□□
Yes but all devices must support it, end-to-end. Otherwise it will get re-datagrammed.
EDIT: Another thing to be careful of is your OS and type of devices... they calculate the MTU differently defending on headers...dulce bellum inexpertis -
Optionsjohnifanx98
Member Posts: 329
Yes but all devices must support it, end-to-end. Otherwise it will get re-datagrammed.
EDIT: Another thing to be careful of is your OS and type of devices... they calculate the MTU differently defending on headers...
Are you saying the jumbo frame I see in my wireshark are merged ones? -
OptionsNotHackingYou
Member Posts: 1,460 ■■■■■■■■□□
Try this article about jumbo frames
Jumbo frame - Wikipedia, the free encyclopediaWhen you go the extra mile, there's no traffic.