Cisco ASR 9000 Series Service Configuration Guide

Modular QoS Deployment Scenarios on Cisco ASR 9000 Series Routers
MPLS QoS
QC-175
Cisco ASR 9000 Series Aggregation Services Router Modular Quality of Service Configuration Guide
OL-23108-02
Step 4a: T1 Member Comes Back Up, Policy Resumed
In this step, if one T1 member comes back up, the policy is resumed for the interface because the total
of priority policing + minimum guaranteed bandwidth is 13 Mbps. This is lower than the bundle link
bandwidth, which is 13,824 Mbps (1,536 kbps * 9 T1 members). It meets the bandwidth requirement,
and the policy is resumed for the bundle interface.
int Serial0/2/1/0/1/2:0
no shut
commit
LC/0/2/CPU0:Aug 9 15:38:45.846 : ifmgr[188]: %PKT_INFRA-LINK-3-UPDOWN : Interface
Serial0/2/1/0/1/2:0, changed state to Down
LC/0/2/CPU0:Aug 9 15:38:45.846 : ifmgr[188]: %PKT_INFRA-LINEPROTO-5-UPDOWN : Line
protocol on Interface Serial0/2/1/0/1/2:0, changed state to Down
LC/0/2/CPU0:Aug 9 15:38:45.851 : ifmgr[188]: %PKT_INFRA-LINK-3-UPDOWN : Interface
Serial0/2/1/0/1/2:0, changed state to Up
LC/0/2/CPU0:Aug 9 15:38:45.859 : ifmgr[188]: %PKT_INFRA-LINEPROTO-5-UPDOWN : Line
protocol on Interface Serial0/2/1/0/1/2:0, changed state to Up
LC/0/2/CPU0:Aug 9 15:38:45.870 : qos_ma_ea[250]: %QOS-QOS_EA_BW_CHG-6-BWCHG_LOG : QOSEA:
updated bandwidth for ifh 4004380 with 12288 Egress Policy (suspend->active)
Or Step 4b: Policy Modified, Policy Resumed
In this step, the policy is modified so that the total of priority policing plus minimum guaranteed
bandwidth is lower than the link bandwidth. The police rate for the voice-ip class is lowered to 6 Mbps.
The total of priority policing plus minimum guaranteed bandwidth is 12 Mbps. This is lower than the
bundle link bandwidth, which is 12,288 Mbps (1,536 kbps * 8 T1 members). The bandwidth requirement
is met, and the policy is resumed for the interface.
policy-map child_template1
class voice-ip
priority level 1
police rate 6 mbps <------------police rate lowered
commit
LC/0/2/CPU0:Aug 9 15:16:17.651 : qos_ma_ea[250]: %QOS-QOS_EA_BW_CHG-6-BWCHG_LOG : QOSEA:
updated bandwidth for ifh 4004380 with 12288 Egress Policy (suspend->active)
<---------- resume msg sent out
MPLS QoS
Note The introductory text and topology diagrams are taken from “MPLS Fundamentals,” Luc De Ghein,
Copyright 2007, Cisco Systems, Inc.
For MPLS QoS, there are three deployment scenarios based on tunneling model: uniform mode, pipe
mode, and short pipe mode.
Table 1 shows an overview of the tunneling models.

Cisco ASR 9000 Series Specifications

General

Brand	Cisco
Model	ASR 9000 Series
Category	Network Router
Language	English