Brocade FastIron Ethernet Switch Traffic Management Guide - Manual (Page 16)

The Determining a packet trust level - SX-FI48GPP, SX-FI-24GPP, SX-FI-24HF, SX-FI-2XG, and SX-
FI-8XG modules figure illustrates how the SX-FI48GPP, SX-FI-24GPP, SX-FI-24HF, SX-FI-2XG, and
SX-FI-8XG modules determine the trust level of a packet. The marking process for these modules is
similar to the marking process for other FastIron SX modules. However, there are major differences
between these modules and other FastIron SX modules.
• For the SX-FI48GPP, SX-FI-24GPP, SX-FI-24HF, SX-FI-2XG, and SX-FI-8XG modules, static
MAC priority takes higher precedence than VLAN priority. For other FastIron SX modules, VLAN
priority takes higher precedence over static MAC priority.
• For other FastIron SX modules, the priority of the dynamically learned MAC address is inherited
from the default port priority. For the SX-FI48GPP, SX-FI-24GPP, SX-FI-24HF, SX-FI-2XG, and
SX-FI-8XG modules, the priority of the dynamically learned MAC address is not inherited from the
default port priority because it is not desirable to allow the port priority to take precedence over
the VLAN priority. All dynamically learned MAC addresses are assigned a priority of 0 in the SX-
Quality of Service
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