Subject: Question about ISL and 802.1Q encapsulation
From: "Dove" <[email-masked]>
To: [email-masked]
Date: Wed, 27 Sep 2000 14:28:21 +0800
Newsgroups: groupstudy.cisco

Hi,

I have a question about ISL and 802.1Q encapsulation/tagging. As I know, ISL
will encapsulate a frame with adding 26 bytes to header and 4 bytes to
trailer; and 802.1Q will modify the existing header and add 4 bytes to it.
My question is: if the frame is already in its maximum size (i.e. 1,518
byte), after ISL or 802.1Q encapsulation/tagging, the frame size will be
greater than the ethernet maximum size. Will it cut the frame into 2 parts
or ignore the frame size checking?

Regards.
dovelet

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