Traffic Subject To Qos Policies; Atm Virtual Circuits Without Qos Policies - Cisco 10000 Series Configuration Manual
Quality of service configuration guide
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- Configuration manual (370 pages) ,
- Troubleshooting manual (70 pages) ,
- Installation manual (14 pages)
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Chapter 3
Configuring QoS Policy Actions and Rules
Traffic Subject to QoS Policies
Table 3-10
Table 3-10
Traffic Types
In-transit IP packets
Locally Destined Traffic
Layer 2 signaling packets such as PPP or Frame Relay negotiation packets,
status packets, and keepalive messages
Packets with IP precedence 6 or 7, which IP-based routing protocols typically
use
All other locally destined traffic
Locally Originated Traffic
Packets marked by Cisco IOS software as PAK_Priority
Packets marked as IP precedence 6 or 7
All other locally originated traffic
1. IP precedence 6 and 7 are not subject to QoS in all releases prior to Cisco IOS Release 12.0(22)S and in Cisco IOS
ATM Virtual Circuits Without QoS Policies
For all ATM virtual circuits (VCs) that do not have a class-default class configured with a shape service
policy (the shape command is configured), the Cisco 10000 series router limits the transmission rate of
the VC to the interface bandwidth minus the sum of the shape rates of other VCs on the interface that do
have service policies.
For example, if you have two VCs on a 150-Mbps interface and VC1 has a shaped service policy of
90 Mbps and VC2 does not have a service policy, the router polices VC2 to 60 Mbps (150 minus 90).
You can change this default behavior by using a shaped service policy on either the VC or the interface:
•
•
OL-7433-09
lists the types of traffic on the Cisco 10000 series router that are subject to QoS policies.
QoS Applicability
Release 12.3(7)XI2.
If you apply the shaped service policy to a single VC that is not an unshaped UBR VC, the router
applies the specified bandwidth to only that specific VC.
By default, the router first allocates bandwidth to the VBR VCs and then allocates any bandwidth
leftover to unshaped UBR VCs. To override this default behavior, apply a service policy to the
unshaped UBR VC using an hierarchical shaping policy. For more information, see
"Defining QoS for Multiple Policy Levels."
If you apply the policy to an interface, the router applies the specified bandwidth to all of the VCs
on the interface that do not have their own service policies.
Cisco 10000 Series Router Quality of Service Configuration Guide
Traffic Subject to QoS Policies
Subject to QoS
Yes
No
No
Yes
No
1
No
Yes
Chapter 13,
3-17
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