Foundry Networks FESX - Page 319

Configuring Quality of Service
December 2005 © Foundry Networks, Inc. 13 - 3
Figure 13.1 Determining a Packet’s Trust Level
Packet received on
ingress port
Does the
packet match an
ACL that defines
a priority?
Is the packet
tagged?
Trust the DSCP-
CoS-mapping or
the DSCP-marking
Trust the 802.1p
CoS value
Trust the priority
of the static
MAC entry
Trust the port’s
default priority
Use the default
priority of 0
Does the
MAC address
match a static
entry?
Does the
port have a
default
priority?
Yes
Yes
Yes
Yes
No
No
No
No