End-to-end QoS deployment techniques for Cisco Catalyst series switches
Examine various QoS components, including congestion management, congestion
avoidance, shaping, policing/admission control, signaling, link efficiency mechanisms, and classification and marking
Map specified class of service (CoS) values to various queues and maintain CoS values through the use of 802.1q tagging on the Cisco Catalyst 2900XL, 3500XL and Catalyst 4000 and 2948G/2980G CatOS Family of Switches
Learn about classification and rewrite capabilities and queue scheduling on the Cisco Catalyst 5000
Implement ACLs, ACPs, ACEs, and low-latency queuing on the Cisco Catalyst 2950 and 3550 Family of Switches
Understand classification, policying, and scheduling capabilities of the Catalyst 4000 and 4500 IOS Family of Switches
Configure QoS in both Hybrid and Native mode on the Catalyst 6500 Family of Switches Utilize Layer 3 QoS to classify varying levels of service with the Catalyst 6500 MSFC and Flexwan
Understand how to apply QoS in campus network designs by examining end-to-end case studies
Quality of service (QoS) is the set of techniques designed to manage network resources. QoS refers to the capability of a network to provide better service to selected network traffic over various LAN and WAN technologies. The primary goal of QoS is to provide flow priority, including dedicated bandwidth, controlled jitter and latency (required by some interactive and delay-sensitive traffic), and improved loss characteristics.
While QoS has become an essential technology for those organizations rolling out a new CTunnel CTunnel interface
Dialer Dialer interface Ethernet IEEE 802.3
Group-Async Async Group interface Lex Lex interface
Loopback Loopback interface
MFR Multilink Frame Relay bundle interface Multilink Multilink-group interface
Null Null interface Serial Serial
Tunnel Tunnel interface
Vif PGM Multicast Host interface Virtual-Template Virtual Template interface Virtual-TokenRing Virtual TokenRing
input Input policy output Output policy | Output modifiers
The interface types speak for themselves, but the input and output options are interesting because they can be used to show you all the policies that are applied in either the input or output direction (depending on which command you choose). More commonly, however, you will probably use the more specific command in Example 5-22.
Example 5-22. Verifying Policy Map Configuration for a Specific Interface
R1# show policy-map interface serial 1/0 Serial1/0
Service-policy output: ACCOUNTING-POLICY
• Table of Contents
• Index
Cisco Catalyst QoS: Quality of Service in Campus Networks By Mike Flannagan CCIE® No. 7651, Richard Froom CCIE No. 5102, Kevin Turek CCIE No. 7284
Publisher: Cisco Press Pub Date: June 06, 2003
ISBN: 1-58705-120-6 Pages: 432
End-to-end QoS deployment techniques for Cisco Catalyst series switches
Examine various QoS components, including congestion management, congestion
avoidance, shaping, policing/admission control, signaling, link efficiency mechanisms, and classification and marking
Map specified class of service (CoS) values to various queues and maintain CoS values through the use of 802.1q tagging on the Cisco Catalyst 2900XL, 3500XL and Catalyst 4000 and 2948G/2980G CatOS Family of Switches
Learn about classification and rewrite capabilities and queue scheduling on the Cisco Catalyst 5000
Implement ACLs, ACPs, ACEs, and low-latency queuing on the Cisco Catalyst 2950 and 3550 Family of Switches
Understand classification, policying, and scheduling capabilities of the Catalyst 4000 and 4500 IOS Family of Switches
Configure QoS in both Hybrid and Native mode on the Catalyst 6500 Family of Switches Utilize Layer 3 QoS to classify varying levels of service with the Catalyst 6500 MSFC and Flexwan
Understand how to apply QoS in campus network designs by examining end-to-end case studies
Quality of service (QoS) is the set of techniques designed to manage network resources. QoS refers to the capability of a network to provide better service to selected network traffic over various LAN and WAN technologies. The primary goal of QoS is to provide flow priority, including dedicated bandwidth, controlled jitter and latency (required by some interactive and delay-sensitive traffic), and improved loss characteristics.
While QoS has become an essential technology for those organizations rolling out a new Class-map: ACCOUNTING-HTTP (match-all)
0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 101
Match: access-group 103 Queueing
Output Queue: Conversation 265
Bandwidth 128 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 0/0
(depth/total drops/no-buffer drops) 0/0/0
Class-map: ACCOUNTING-FTP (match-all) 0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 102
Match: access-group 103 Queueing
Output Queue: Conversation 266
Bandwidth 128 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 0/0
(depth/total drops/no-buffer drops) 0/0/0 Traffic Shaping
Target/Average Byte Sustain Excess Interval Increment Rate Limit bits/int bits/int (ms) (bytes) 256000/256000 1984 7936 7936 31 992
Adapt Queue Packets Bytes Packets Bytes Shaping
• Table of Contents
• Index
Cisco Catalyst QoS: Quality of Service in Campus Networks By Mike Flannagan CCIE® No. 7651, Richard Froom CCIE No. 5102, Kevin Turek CCIE No. 7284
Publisher: Cisco Press Pub Date: June 06, 2003
ISBN: 1-58705-120-6 Pages: 432
End-to-end QoS deployment techniques for Cisco Catalyst series switches
Examine various QoS components, including congestion management, congestion
avoidance, shaping, policing/admission control, signaling, link efficiency mechanisms, and classification and marking
Map specified class of service (CoS) values to various queues and maintain CoS values through the use of 802.1q tagging on the Cisco Catalyst 2900XL, 3500XL and Catalyst 4000 and 2948G/2980G CatOS Family of Switches
Learn about classification and rewrite capabilities and queue scheduling on the Cisco Catalyst 5000
Implement ACLs, ACPs, ACEs, and low-latency queuing on the Cisco Catalyst 2950 and 3550 Family of Switches
Understand classification, policying, and scheduling capabilities of the Catalyst 4000 and 4500 IOS Family of Switches
Configure QoS in both Hybrid and Native mode on the Catalyst 6500 Family of Switches Utilize Layer 3 QoS to classify varying levels of service with the Catalyst 6500 MSFC and Flexwan
Understand how to apply QoS in campus network designs by examining end-to-end case studies
Quality of service (QoS) is the set of techniques designed to manage network resources. QoS refers to the capability of a network to provide better service to selected network traffic over various LAN and WAN technologies. The primary goal of QoS is to provide flow priority, including dedicated bandwidth, controlled jitter and latency (required by some interactive and delay-sensitive traffic), and improved loss characteristics.
While QoS has become an essential technology for those organizations rolling out a new Active Depth Delayed Delayed Active - 0 0 0 0 0 no
Class-map: DEVELOPMENT-HTTP (match-all) 0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 101
Match: access-group 104 Queueing
Output Queue: Conversation 267
Bandwidth 64 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 0/0
(depth/total drops/no-buffer drops) 0/0/0
Class-map: DEVELOPMENT-FTP (match-all) 0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps Match: access-group 102
Match: access-group 104 Queueing
Output Queue: Conversation 268
Bandwidth 32 (kbps) Max Threshold 64 (packets) (pkts matched/bytes matched) 0/0
(depth/total drops/no-buffer drops) 0/0/0
Class-map: class-default (match-any) 0 packets, 0 bytes
5 minute offered rate 0 bps, drop rate 0 bps
• Table of Contents
• Index
Cisco Catalyst QoS: Quality of Service in Campus Networks By Mike Flannagan CCIE® No. 7651, Richard Froom CCIE No. 5102, Kevin Turek CCIE No. 7284
Publisher: Cisco Press Pub Date: June 06, 2003
ISBN: 1-58705-120-6 Pages: 432
End-to-end QoS deployment techniques for Cisco Catalyst series switches
Examine various QoS components, including congestion management, congestion
avoidance, shaping, policing/admission control, signaling, link efficiency mechanisms, and classification and marking
Map specified class of service (CoS) values to various queues and maintain CoS values through the use of 802.1q tagging on the Cisco Catalyst 2900XL, 3500XL and Catalyst 4000 and 2948G/2980G CatOS Family of Switches
Learn about classification and rewrite capabilities and queue scheduling on the Cisco Catalyst 5000
Implement ACLs, ACPs, ACEs, and low-latency queuing on the Cisco Catalyst 2950 and 3550 Family of Switches
Understand classification, policying, and scheduling capabilities of the Catalyst 4000 and 4500 IOS Family of Switches
Configure QoS in both Hybrid and Native mode on the Catalyst 6500 Family of Switches Utilize Layer 3 QoS to classify varying levels of service with the Catalyst 6500 MSFC and Flexwan
Understand how to apply QoS in campus network designs by examining end-to-end case studies
Quality of service (QoS) is the set of techniques designed to manage network resources. QoS refers to the capability of a network to provide better service to selected network traffic over various LAN and WAN technologies. The primary goal of QoS is to provide flow priority, including dedicated bandwidth, controlled jitter and latency (required by some interactive and delay-sensitive traffic), and improved loss characteristics.
While QoS has become an essential technology for those organizations rolling out a new Match: any
As you can see, the output is far more detailed than the output from the previous command. In fact, this command probably provides one of the most detailed outputs of any command in Cisco IOS. Certainly, this is the most comprehensive output of any MQC command.
• Table of Contents
• Index
Cisco Catalyst QoS: Quality of Service in Campus Networks By Mike Flannagan CCIE® No. 7651, Richard Froom CCIE No. 5102, Kevin Turek CCIE No. 7284
Publisher: Cisco Press Pub Date: June 06, 2003
ISBN: 1-58705-120-6 Pages: 432
End-to-end QoS deployment techniques for Cisco Catalyst series switches
Examine various QoS components, including congestion management, congestion
avoidance, shaping, policing/admission control, signaling, link efficiency mechanisms, and classification and marking
Map specified class of service (CoS) values to various queues and maintain CoS values through the use of 802.1q tagging on the Cisco Catalyst 2900XL, 3500XL and Catalyst 4000 and 2948G/2980G CatOS Family of Switches
Learn about classification and rewrite capabilities and queue scheduling on the Cisco Catalyst 5000
Implement ACLs, ACPs, ACEs, and low-latency queuing on the Cisco Catalyst 2950 and 3550 Family of Switches
Understand classification, policying, and scheduling capabilities of the Catalyst 4000 and 4500 IOS Family of Switches
Configure QoS in both Hybrid and Native mode on the Catalyst 6500 Family of Switches Utilize Layer 3 QoS to classify varying levels of service with the Catalyst 6500 MSFC and Flexwan
Understand how to apply QoS in campus network designs by examining end-to-end case studies
Quality of service (QoS) is the set of techniques designed to manage network resources. QoS refers to the capability of a network to provide better service to selected network traffic over various LAN and WAN technologies. The primary goal of QoS is to provide flow priority, including dedicated bandwidth, controlled jitter and latency (required by some interactive and delay-sensitive traffic), and improved loss characteristics.
While QoS has become an essential technology for those organizations rolling out a new
Summary
This chapter examined the three-step process for configuring all the QoS mechanisms supported by the MQC. These steps are as follows:
Step 1. Class map configuration Step 2. Policy map configuration Step 3. Service policy application
Class maps come in two types:
match-any— A logical OR operation, which means that only one of the match conditions must be met for a packet to belong to this class
match-all— A logical AND operation, which means that all match criteria must be matched for a packet to belong to this class
match-all is the default, if no option is specified. Class maps are capable of matching certain criteria, but the majority of matches come via the matching of an access group. As detailed earlier in the chapter, you can combine match-all and match-any class maps with access group matching to accomplish fairly complex matching criteria.
Policy maps define many different actions that you can apply to a given class. Some actions may only be applied in a single direction, not both. Not all of these actions can be applied to packets entering an interface; instead, they are only allowed as an output policy (for packets leaving an interface). Traffic shaping is a good example of a policy map action that cannot currently be applied to inbound packets. Further, not all actions that are specified are supported in hardware on Catalyst products, which could mean a severe performance impact for certain features.
Always check your Cisco IOS version and specific hardware type to determine hardware support for software features.
The next chapter introduces the platform-specific configuration options and specific hardware available for the Catalyst 2950 and 3550 products. The following chapter includes examples, using the MQC explained in this chapter, that show you how to configure QoS features on these products.
• Table of Contents
• Index
Cisco Catalyst QoS: Quality of Service in Campus Networks By Mike Flannagan CCIE® No. 7651, Richard Froom CCIE No. 5102, Kevin Turek CCIE No. 7284
Publisher: Cisco Press Pub Date: June 06, 2003
ISBN: 1-58705-120-6 Pages: 432
End-to-end QoS deployment techniques for Cisco Catalyst series switches
Examine various QoS components, including congestion management, congestion
avoidance, shaping, policing/admission control, signaling, link efficiency mechanisms, and classification and marking
Map specified class of service (CoS) values to various queues and maintain CoS values through the use of 802.1q tagging on the Cisco Catalyst 2900XL, 3500XL and Catalyst 4000 and 2948G/2980G CatOS Family of Switches
Learn about classification and rewrite capabilities and queue scheduling on the Cisco Catalyst 5000
Implement ACLs, ACPs, ACEs, and low-latency queuing on the Cisco Catalyst 2950 and 3550 Family of Switches
Understand classification, policying, and scheduling capabilities of the Catalyst 4000 and 4500 IOS Family of Switches
Configure QoS in both Hybrid and Native mode on the Catalyst 6500 Family of Switches Utilize Layer 3 QoS to classify varying levels of service with the Catalyst 6500 MSFC and Flexwan
Understand how to apply QoS in campus network designs by examining end-to-end case studies
Quality of service (QoS) is the set of techniques designed to manage network resources. QoS refers to the capability of a network to provide better service to selected network traffic over various LAN and WAN technologies. The primary goal of QoS is to provide flow priority, including dedicated bandwidth, controlled jitter and latency (required by some interactive and delay-sensitive traffic), and improved loss characteristics.
While QoS has become an essential technology for those organizations rolling out a new
Chapter 6. QoS Features Available on the Catalyst 2950 and 3550 Family of
Switches
This chapter continues the discussion of QoS feature support on Catalyst switches with the Catalyst 2950 Family and 3550 Family of switches. From an architectural perspective, the Catalyst 2950 Family of switches supports only Layer 2 MAC address forwarding and does not support Layer 3 routing. However, the Catalyst 2950 Family of switches supports a multitude of Layer 3 features such as classification based on CoS or DSCP, security and QoS access-control list (ACL) support, policing, and Internet Group Management Protocol (IGMP) snooping. Because the Catalyst 2950 Family of switches does not support IP routing, the typical network
installations find the Catalyst 2950 Family of switches acting as access layer switches. Moreover, the Catalyst 3550 Family of switches supports IP routing and is applicable as an access layer or distribution layer switch. The Catalyst 3550 Family of switches may act as a core switch in small networks aggregating Catalyst 3550 switches and other access layer switches, such as the Catalyst 2950, 2900XL, and 3500XL Family of switches.
Both the Catalyst 2950 and 3550 Family of switches supports a wide range of QoS features that rival higher-end switches, including the Catalyst 4000 IOS Family of switches and the Catalyst 6500 Family of switches. Because the Catalyst 2950 and Catalyst 3550 switches use the same Cisco IOS code base, both support a base set of QoS features while the Catalyst 3550 Family of switches supports a few additional QoS features. Table 6-1, in the "Software Requirements"
section of this chapter, outlines the QoS features supported by both the Catalyst 2950 and 3550 Family of switches along with those features only supported on the Catalyst 3550 Family of switches.
Specifically, this chapter discusses QoS support on the Catalyst 2950 and 3550 Family of switches, and includes the following topics:
Architectural Overview
This chapter discusses both the Catalyst 2950 and Catalyst 3550 Family of switches concurrently because of the feature overlap of these switches. This chapter also indicates those features supported only on the Catalyst 3550 Family of switches on a per-feature basis.
• Table of Contents
• Index
Cisco Catalyst QoS: Quality of Service in Campus Networks By Mike Flannagan CCIE® No. 7651, Richard Froom CCIE No. 5102, Kevin Turek CCIE No. 7284
Publisher: Cisco Press Pub Date: June 06, 2003
ISBN: 1-58705-120-6 Pages: 432
End-to-end QoS deployment techniques for Cisco Catalyst series switches
Examine various QoS components, including congestion management, congestion
avoidance, shaping, policing/admission control, signaling, link efficiency mechanisms, and classification and marking
Map specified class of service (CoS) values to various queues and maintain CoS values through the use of 802.1q tagging on the Cisco Catalyst 2900XL, 3500XL and Catalyst 4000 and 2948G/2980G CatOS Family of Switches
Learn about classification and rewrite capabilities and queue scheduling on the Cisco Catalyst 5000
Implement ACLs, ACPs, ACEs, and low-latency queuing on the Cisco Catalyst 2950 and 3550 Family of Switches
Understand classification, policying, and scheduling capabilities of the Catalyst 4000 and 4500 IOS Family of Switches
Configure QoS in both Hybrid and Native mode on the Catalyst 6500 Family of Switches Utilize Layer 3 QoS to classify varying levels of service with the Catalyst 6500 MSFC and Flexwan
Understand how to apply QoS in campus network designs by examining end-to-end case studies
Quality of service (QoS) is the set of techniques designed to manage network resources. QoS refers to the capability of a network to provide better service to selected network traffic over various LAN and WAN technologies. The primary goal of QoS is to provide flow priority, including dedicated bandwidth, controlled jitter and latency (required by some interactive and delay-sensitive traffic), and improved loss characteristics.
While QoS has become an essential technology for those organizations rolling out a new