Dell PowerConnect B-FCXs, Configuration Manual

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PowerConnect B-Series FCX Configuration Guide 593
53-1002266-01
Classification
17
FIGURE 112 Determining a packet trust level - PowerConnect B-Series FCX devices
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
Table 94 through Table 97 . The mapping between the internal priority and the forwarding
queue cannot be changed.
Table 94 through Table 97 show the default QoS mappings that are used if the trust level for CoS or
DSCP is enabled.
P a cket received on
ingre ss port
Doe s the
port h a ve a
def au lt
priority?
U s e the def au lt
priority of 0
Tr us t the port’ s
def au lt priority
Tr us t the DSCP-
CoS-m a pping or
the DSCP-m a rking
Ye s
Doe s the
MAC a ddre ss
m a tch a s t a tic
entry?
Tr us t the priority
of the s t a tic
MAC entry
Ye s
Ye s
No
No
No
No
Ye s
Tr us t the 802.1p
CoS v a l u e
I s the p a cket
t a gged?
Doe s the
p a cket m a tch a n
ACL th a t define s
a priority?