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Kevin,  This was not an arbitrary decision. Both 802.1Q and 1904.1 define frame formats and operations on double-tagged frames. There is no specification defining the format or processing operations for triple- or quadruple-tagged frames.  So, if a user classifies and manipulates the 3rd and 4th tag, what existing standard defines that processing? In 802.1, the ISS interface shows that frames can have just two tags S-TAG and C-TAG (I am not taking about I-tagged frames, which are very different).   -Glen  From: Kevin Noll [mailto:kevin.noll@xxxxxxxxxxxx]  Currently the draft allows classification and manipulation on up to 2 VLAN tags. Recalling the discussion that settled on 2 tags, this was a somewhat arbitrary decision that was made to allow the discussion to move on.  It is common to have more than 2 tags.  How would a user classify on or manipulate a 3rd or 4th tag, or an arbitrary tag depth?  --kan-- -- Kevin A. Noll  To unsubscribe from the STDS-1904-2-TF list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-1904-2-TF&A=1 To unsubscribe from the STDS-1904-2-TF list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-1904-2-TF&A=1 |