Users Guide

Table 14. ETS Traffic Groupings
Traffic Groupings Description
Group ID A 4-bit identifier assigned to each priority group.
The range is from 0 to 7 configurable; 8 - 14
reservation and 15.0 - 15.7 is strict priority group..
Group bandwidth Percentage of available bandwidth allocated to a
priority group.
Group transmission selection algorithm (TSA) Type of queue scheduling a priority group uses.
In Dell Networking OS, ETS is implemented as follows:
• ETS supports groups of 802.1p priorities that have:
– PFC enabled or disabled
– No bandwidth limit or no ETS processing
• ETS uses the DCB MIB IEEE 802.1azd2.5.
Data Center Bridging Exchange Protocol (DCBx)
By default, the data center bridging exchange (DCBx) protocol is disabled; ETS is also disabled.
DCBx allows a switch to automatically discover DCB-enabled peers and exchange configuration
information. PFC and ETS use DCBx to exchange and negotiate parameters with peer devices. DCBx
capabilities include:
• Discovery of DCB capabilities on peer-device connections.
• Determination of possible mismatch in DCB configuration on a peer link.
• Configuration of a peer device over a DCB link.
DCBx requires the link layer discovery protocol (LLDP) to provide the path to exchange DCB parameters
with peer devices. Exchanged parameters are sent in organizationally specific TLVs in LLDP data units. For
more information, see Link Layer Discovery Protocol (LLDP). The following LLDP TLVs are supported for
DCB parameter exchange:
PFC parameters PFC Configuration TLV and Application Priority Configuration TLV.
ETS parameters ETS Configuration TLV and ETS Recommendation TLV.
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Data Center Bridging (DCB)