Classification Comparisons - Cisco ME 3400G-2CS - Ethernet Access Switch Software Configuration Manual

Chapter 30 Configuring QoS
cs6
cs7
default
ef
For more information on DSCP prioritization, see RFC-2597 (AF per-hop behavior), RFC-2598 (EF), or
RFC-2475 (DSCP).

Classification Comparisons

Table 30-1
Table 30-1 Typical Traffic Classifications
Traffic Type
Voice-bearer—traffic in a priority queue or the queue with the
highest service weight and lowest drop priority.
Voice control—signalling traffic, related to call setup, from a
voice gateway or voice application server.
Video conferencing—in most networks, video conferencing
over IP has similar loss, delay, and delay variation requirements
as voice over IP traffic.
Streaming video—relatively high bandwidth applications with a
high tolerance for loss, delay, and delay variation. Usually
considered more important than regular background
applications such as e-mail and web browsing
Mission critical date (gold data)—delay-sensitive applications
critical to the operation of an enterprise.
Level 1
Level 2
Level 3
Less critical data (silver data)—noncritical, but relatively
important data.
Level 1
Level 2
Level 3
Best-effort data (bronze data)—other traffic, including all
noninteractive traffic, regardless of importance.
Less than best-effort data—noncritical, bandwidth-intensive
data traffic given the least preference. This is the first traffic type
to be dropped.
Level 1
Level 2
Level 3
78-17058-01
Match packets with CS6(precedence 6) dscp (110000)
Match packets with CS7(precedence 7) dscp (111000)
Match packets with default dscp (000000)
Match packets with EF dscp (101110)
shows suggested IP DSCP, IP precedence, and CoS values for typical traffic types:
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
DSCP DSCP
per-hop (decimal)
EF 46
AF31 26
AF41 34
AF13 14
AF21 18
AF22 20
AF23 22
AF11 10
AF12 12
AF13 14
Default 0
2
4
6
Understanding QoS
IP
Precedence CoS
5 5
3 3
4 4
1 1
2 2
2 2
2 2
1 1
1 1
1 1
0 0
0 0
0 0
0 0
30-9