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CCIE Routing and Switching v5.0 Official Cert Guide: Classification and Marking

Dec 16, 2014

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CCIE Routing and Switching v5.0 Official Cert Guide, Volume 2, 5th Edition

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Foundation Summary

This section lists additional details and facts to round out the coverage of the topics in this chapter. Unlike most of the Cisco Press Exam Certification Guides, this “Foundation Summary” does not repeat information presented in the “Foundation Topics” section of the chapter. Please take the time to read and study the details in the “Foundation Topics” section of the chapter, as well as review items noted with a Key Topic icon.

Table 3-12 lists the various match commands that can be used for MQC tools like CB Marking.

Table 3-12 match Configuration Command Reference for MQC Tools

Command	Function
match [ ip ] precedence precedence-value [precedence-value precedence-value precedence-value]	Matches precedence in IPv4 packets when the ip parameter is included; matches IPv4 and IPv6 packets when the ip parameter is missing.
match access-group { access-group \| name access-group-name }	Matches an ACL by number or name.
match any	Matches all packets.
match class-map class-map-name	Matches based on another class map.
match cos cos-value [ cos-value cos-value cos-value ]	Matches a CoS value.
match destination-address mac address	Matches a destination MAC address.
match fr-dlci dlci-number	Matches a particular Frame Relay DLCI.
match input-interface interface-name	Matches an ingress interface.
match ip dscp [ip-dscp-value ip-dscp- value ip-dscp-value ip-dscp-value ip-dscp-value ip- dscp-value ip-dscp-value]	Matches DSCP in IPv4 packets when the ip parameter is included; matches IPv4 and IPv6 packets when the ip parameter is missing.
match ip rtp starting-port-number portrange	Matches the RTP’s UDP port-number range, even values only.
match mpls experimental number	Matches an MPLS Experimental value.
match mpls experimental topmost value	When multiple labels are in use, matches the MPLS EXP field in the topmost label.
match not match-criteria	Reverses the matching logic. In other words, things matched by the matching criteria do not match the class map.
match packet length { max maximumlength-value [min minimum-lengthvalue ] \| min minimum-length-value [ max maximum-length-value]}	Matches packets based on the minimum length, maximum length, or both.
match protocol citrix app applicationname-string	Matches NBAR Citrix applications.
match protocol http [ url url-string \| host hostname- string \| mime MIME-type ]	Matches a host name, URL string, or MIME type.
match protocol protocol-name	Matches NBAR protocol types.
match protocol rtp [ audio \| video \| payloadtype payload-string ]	Matches RTP audio or video payload, based on the payload type. Also allows explicitly specifying payload types.
match qos-group qos-group-value	Matches a QoS group.
match source-address mac addressdestination	Matches a source MAC address.

Table 3-13 lists AutoQoS and QoS verification commands.

Table 3-13 AutoQoS and QoS Verification Commands

Command	Function
auto qos voip { cisco-phone \| ciscosoftphone }	Enables AutoQoS VoIP on a switch access interface
auto qos voip trust	Enables AutoQoS VoIP on a switch uplink interface
auto qos voip [ trust ]	Enables AutoQoS VoIP on a router interface
auto discovery qos [ trust ]	Enables NBAR traffic discovery for AutoQoS Enterprise
auto qos	Enables AutoQoS Enterprise on an interface
show auto qos	Displays the interface AutoQoS commands
show mls qos	Displays queueing and COS/DSCP mappings
show policy-map interface	Displays the interface queuing actions caused by the policy map
show auto discovery qos	Displays the traffic collected by NBAR
show auto qos	Displays the configuration generated by the AutoQoS macro

Table 3-14 lists the RFCs related to DiffServ.

Table 3-14 DiffServ RFCs

RFC	Title	Comments
2474	Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers	Contains the details of the 6-bit DSCP field in an IP header
2475	An Architecture for Differentiated Service	The core DiffServ conceptual document
2597	Assured Forwarding PHB Group	Defines a set of 12 DSCP values and a convention for their use
3246	An Expedited Forwarding PHB	Defines a single DSCP value as a convention for use as a low-latency class
3260	New Terminology and Clarifications for DiffServ	Clarifies, but does not supersede, existing DiffServ RFCs

Memory Builders

The CCIE Routing and Switching written exam, like all Cisco CCIE written exams, covers a fairly broad set of topics. This section provides some basic tools to help you exercise your memory about some of the broader topics covered in this chapter.

Fill In Key Tables from Memory

Appendix E, “Key Tables for CCIE Study,” on the CD in the back of this book, contains empty sets of some of the key summary tables in each chapter. Print Appendix E, refer to this chapter’s tables in it, and fill in the tables from memory. Refer to Appendix F, “Solutions for Key Tables for CCIE Study,” on the CD, to check your answers.

Definitions

Next, take a few moments to write down the definitions for the following terms:

IP Precedence
ToS byte
Differentiated Services
DS field
Per-Hop Behavior
Assured Forwarding
Expedited Forwarding
Class Selector
Class of Service
Differentiated Services Code Point
User Priority
Discard Eligible
Cell Loss Priority
MPLS Experimental bits
class map
policy map
service policy
Modular QoS CLI
Class-Based Marking
Network-Based Application Recognition
QoS preclassification
AutoQoS

Refer to the glossary to check your answers.

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