But Ethernet is not only for IP, what about other protocols ?
-----Original Message-----
From: Alan Cox [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, April 17, 2001 3:41 PM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Subject: Re: change_mtu boundary checking error
> Now, the high boundary seemed reasonable (ETH_FRAME_LEN - ETH_HLEN =
> ETH_DATA_LEN) which gives 1500, but why is the low boundary set to 68 ?
> According to my calculations, it should have been ETH_ZLEN - ETH_HLEN
which
> gives 46.
The IPv4 minimum MTU is 68 bytes. Below that not all frames can be delivered
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