tcpdump mailing list archives

Fwd: Wrong bytes for DSA To_CPU code.


From: Shady Atef via tcpdump-workers <tcpdump-workers () lists tcpdump org>
Date: Sun, 25 Jul 2021 23:11:41 +0200

--- Begin Message --- From: Shady Atef <shadyoatef () gmail com>
Date: Sun, 25 Jul 2021 23:11:41 +0200
I think the following page on the website has something wrong.
It lists b17,b16 and b12 as the code field for the To_CPU frames. While in
the `print_dsa.c` or the Linux kernel implementation, b18, b17 and b12 are
used.

https://www.tcpdump.org/linktypes/LINKTYPE_DSA_TAG_DSA.html

Another question, I work in a team building verification tool for Ethernet
designs.
Is there a method to differentiate between the normal Ethernet frames and
DSA-tagged one ? In other words, can a port multiplex between the two types
? or each port in a DSA device is known to utilize tagging or not ?
-- 
*Regards*
*Shady Atef .*


-- 
*Regards*
*Shady Atef .*

--- End Message ---
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