Enterprise QoS Solution Reference Network Design Guide

QoS Design Overview
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Enterprise QoS Solution Reference Network Design Guide
Chapter 2 Campus QoS Design
Another factor to keep in mind is that certain Catalyst platforms allow only up to 8 policers per
FastEthernet port. Therefore, the model presented here is made to conform to this constraint to make it
more generic and modular. For this reason, a separate policer has not been defined for call signaling
traffic from Softphone. An access list to identify such traffic could be included within the
Mission-Critical Data access lists, which is detailed in the configuration examples presented later in this
chapter.
The logic of these advanced policers is shown in Figure 2-9.
Figure 2-9 Conditionally-Trusted Endpoint Policing—IP Phone + PC + Scavenger (Advanced) Model
Start
Mission-Critical
Data ACLs
Transactional
Data ACLs
Bulk
Data ACLs
Legend for Figure 2-9:
MCD = Mission Critical Data
TD = Transactional Data
BD = Bulk Data
VVLAN +
DSCP EF
No
VVLAN +
DSCP AF31 or
CS3
No
VVLAN
ANY
No
DVLAN +
UDP 16384-
32767
No
No
No
Yes
Yes
Yes
128 kbps
No
32 kbps
No
32 kbps
DVLAN + Yes
MCD ACLs 5 Mbps
DVLAN +
TD ACLs
No
No
DVLAN + Yes
BD ACLs 5 Mbps
No
DVLAN
ANY
Yes
No
No
No
500 kbps
No
Yes
Yes
Yes
Yes
Yes
Yes
Trust and Transmit
Drop
Re-Mark to DSCP CS3
and Transmit
Re-Mark to DSCP CS1
and Transmit
Re-Mark to DSCP 0
and Transmit
Re-Mark to DSCP CS1
and Transmit
Re-Mark to DSCP AF41
and Transmit
Re-Mark to DSCP CS1
and Transmit
Re-Mark to DSCP 25
and Transmit
Re-Mark to DSCP CS1
and Transmit
Yes Yes
Re-Mark to DSCP AF21
5 Mbps
and Transmit
Re-Mark to DSCP CS1
and Transmit
Re-Mark to DSCP AF11
and Transmit
Re-Mark to DSCP CS1
and Transmit
Yes Yes
Re-Mark to DSCP 0
5 Mbps
and Transmit
Re-Mark to DSCP CS1
and Transmit
Version 3.3