Dell PowerConnect B-FCXs Configuration Manual page 635

FIGURE 112
Once a packet is classified, it is mapped to an internal forwarding queue. There are eight queues
designated 0 through 7. The internal forwarding priority maps to one of these eight queues as
shown in
queue cannot be changed.
Table 94
DSCP is enabled.
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Determining a packet trust level - PowerConnect B-Series FCX devices
Packet received on
ingress port
Table 94 through Table 97. The mapping between the internal priority and the forwarding
through Table 97 show the default QoS mappings that are used if the trust level for CoS or
Does the
Yes
packet match an
ACL that defines
a priority?
No
Does the
Yes
MAC address
match a static
entry?
No
Yes
Is the packet
tagged?
No
Does the
Yes
port have a
default
priority?
No
Use the default
priority of 0
Classification
Trust the DSCP-
CoS-mapping or
the DSCP-marking
Trust the priority
of the static
MAC entry
Trust the 802.1p
CoS value
Trust the port's
default priority
17
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