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Date:      Sat, 27 Sep 2014 18:24:06 -0700
From:      "Danny J. Mitzel" <mitzel@acm.org>
To:        Adrian Chadd <adrian@freebsd.org>
Cc:        "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, Tony Moseby <tsmoseby@yahoo.no>
Subject:   Re: vlan id 0
Message-ID:  <CAGGpV=E8cS-2p3zv2BORbz3a_AmVVOvYoRbxOJDX=kSudADPrg@mail.gmail.com>
In-Reply-To: <CAJ-VmonfdE_NPo%2BydnE8xHb_j8ZURG-pCm3EZUEEP0u9T98f1g@mail.gmail.com>
References:  <1411826158.72985.YahooMailNeo@web172803.mail.ir2.yahoo.com> <CAJ-VmonfdE_NPo%2BydnE8xHb_j8ZURG-pCm3EZUEEP0u9T98f1g@mail.gmail.com>

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  On Sat, Sep 27, 2014 at 4:44 PM, Adrian Chadd wrote:
  > .. the spec allows vlan id=0?

0 is not a valid VLAN ID but the specs do allow it
in a tagged packet, it's called "Priority tagged".
The priority bits should be interpreted when making
any queuing / scheduling decisions during forwarding.
The VLAN ID bits are ignored and packet is to be
treated as untagged during forwarding / flooding
decisions.



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