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BLADEOS 6.5.2 Application Guide
BMD00220, October 2010 Chapter 14: FCoE and CEE 193
Effects on 802.1p Quality of Service
While CEE is off (the default), the G8124 allows 802.1p priority values to be used for Quality of
Service (QoS) configuration (see page 133). 802.1p QoS default settings are shown in Table 16, but
can be changed by the administrator.
When CEE is turned on, 802.1p QoS is replaced by ETS (see “Enhanced Transmission Selection”
on page 204). As a result, while CEE is turned on, the 802.1p QoS configuration commands are no
longer available on the switch (the menu is restored when CEE is turned off).
In addition, when CEE is turned on, prior 802.1p QoS settings are replaced with new defaults
designed for use with ETS priority groups (PGIDs) as shown in Table 16:
When CEE is on, the default ETS configuration also allocates a portion of link bandwidth to each
PGID as shown in Table 17:
Table 16 CEE Effects on 802.1p Defaults
802.1p QoS Configuration
With CEE Off (default)
ETS Configuration
With CEE On
Priority COSq Weight Priority COSq PGID
002 022
102 122
202 222
302 333
414 444
514 544
614 644
714 7715
Table 17 Default ETS Bandwidth Allocation
PGID Typical Use Bandwidth
2LAN 10%
3SAN 50%
4 Latency-sensitive LAN 40%