Cisco WS-C6506

52-8
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 52 Configuring QoS
Understanding How QoS Works
Figure 52-6 Layer 2 Switching Engine Classification and Marking
Figure 52-7 Multilayer Switch Feature Card Marking (MSFC and MSFC2)
Ye s
From
Ingress port
To
Egress port
*Match
Destination
MAC Address/
VLAN?
Apply
configured
CoS
No
*From SET QOS MAC-COS command
L2 Switching Engine Classification and Marking
25031
27107
To egress
port
IP traffic
from PFC?
Write ToS
byte into
packet
No
Ye s
Multilayer Switch Feature Card (MSFC) marking
From PFC
Route
traffic
CoS = 0 for all traffic
(not configurable)