| Description | CIN is Cisco Intel Nuova DCBX (version 1.0).
CEE is converged enhanced ethernet DCBX (version 1.06).
IEEE is 802-1 az version.
The default value is auto.
DCBX supports the legacy implementations v1.0 (CIN) and v1.06 (CEE)
in addition to standard IEEE version 2.4 DCBX.
1.DCBX starts in standard IEEE mode by sending an IEEE standard
version 2.4 DCBX frame. If the peer responds,
then IEEE standard version 2.4 DCBX is used,Starts means
after a link up, a DCBX timeout (or multiple peer condition)
or when commanded by the network operator.
If DCBX receives a DCBX frame with an OUI indicating a
legacy version, it immediately switches into legacy mode
for the detected version and does not wait for the 3x LLDP fast timeout.
2.If no IEEE DCBX response is received within 3 times the LLDP
fast transmit timeout period, DCBX immediately transmits
a version 1.06 DCBX frame with the appropriate version number.
If DCBX receives a DCBX frame with an OUI indicating IEEE standard support,
it immediately switches into IEEE standard mode and does
not wait for the timer. If DCBX receives a DCBX frame with an
OUI indicating legacy mode and a version number indicating
version 1.0 support, it immediately switches into legacy 1.0
mode and does not wait for the timer.
3.If no version 1.06 response is received within 3 times the DCBX
fast transmit timeout period, DCBX falls back to version 1.0
and immediately transmits a version 1.0 frame. If no response
is received within 3 times the DCBX fast transmit period,
DCBX waits the standard LLDP timeout period, and then begins
again with step 1. If DCBX receives a DCBX frame with an OUI
indicating IEEE standard mode, it immediately switches into
IEEE standard mode. |