Just reading "Layer 2 Switching and Bridging" by Leigh
Anne Chisholm.
Cut-Through
"Since the port does not wait to receive the CRC at
the end 'if/of' the frame, it cannot determine the
integrity of the data received"
Happy with that.
"Cut-through switches CAN perform a CRC check as the
frame p
>Just reading "Layer 2 Switching and Bridging" by Leigh
>Anne Chisholm.
Leigh Anne can answer with exactly what she had in mind, but let me
make some observations.
>
>Cut-Through
>
>"Since the port does not wait to receive the CRC at
>the end 'if/of' the frame, it cannot determine the
>integri
This means that although the switch cannot prevent the forwarding of invalid
frames since it begins forwarding prior to verifying the checksum, it can
keep track of the number of errored frames since it does eventually verify
the checksum. In other words, unlike store and forward switches who ver
).
-- Leigh Anne
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Phil Barker
Sent: Friday, August 17, 2001 4:40 AM
To: [EMAIL PROTECTED]
Subject: Certificationzone White Paper ? [7:16354]
Just reading "Layer 2 Switching and Bridging" by
Agreed and I would add a comment. A lot of people assume that cut-through
means that the bits have whipped through and disappeared. Actually, Cisco
switches buffer frames regardless of switching mode. This means that the
switch can calculate the CRC, as you say, and keep track of bad CRC counts
5 matches
Mail list logo
