Cisco WS-C6506 Software Manual page 1241

Chapter 52 Configuring QoS
Figure 52-8
From switching
engine or MSFC
Figure 52-9
From switching
engine or MSFC
OL-8978-04
Ethernet Egress Port Scheduling, Congestion Avoidance, and Marking
Ethernet egress port scheduling, congestion avoidance, and marking
Drop thresholds
Single-Port ATM OC-12 Switching Module Marking
Single-port ATM OC-12 switching module marking
IP traffic
from PFC?
No
Transmit
cell
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
PFC3
only
DSCP
Yes
IP traffic
rewrite
from PFC?
enabled?
No
No
Write CoS
Yes
ISL or
into
802.1Q?
frame
No
Transmit
frame
Write ToS
Yes
byte into
packet
Understanding How QoS Works
Write ToS
Yes
byte into
packet
52-9