The answer to this situation is dependent upon the kind of targeted traffic distinctions you wish to make, likewise the version of IOS you are managing with your routers.
There will have to be one thing that defines the various types of site traffic which you wish to prioritize. [...]
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The conventions used to present command syntax in this book are the same conventions used in the IOS Command Reference. The Command Reference describes these conventions as follows:
Boldface indicates commands and keywords that are entered literally as shown. In actual configuration examples and output (not general command syntax), boldface indicates commands that are manually input [...]
Custom Queuing (CQ) does not have a strict priority scheduling mechanisms like PQ; instead, CQ tries to be fair by providing all classes with some ability to transmit packets in each interval of time. With CQ, there can be up to 16 queues and the packets in those queues are serviced in a round-robin fashion. [...]
The first step for configuring any QoS mechanism in the MQC is the configuration of a class-map.
Simply stated, the class map defines which traffic you want the router to match. This is the fundamental step that allows the router to differentiate one traffic type from another. This is traffic classification, and without classification there can [...]
The classification passthrough option forces the switch to treat CoS and DSCP independently. The default behavior, and the lone behavior for all software versions prior to Cisco IOS versions 12.1.11(EA)1, of the switch is to modify the CoS or DSCP value depending on internal trust DSCP and any mapping tables. This is the behavior described [...]
The values on which the class map can be configured to match are explained in the previous output, but this list provides more detailed explanations of some of these options:
access-group— Allows the configuration of an access-control list (ACL) and the matching of the criteria defined within that ACL.
any— Allows for the matching of all packets. [...]
The Catalyst 5000 Family of switches supports QoS with only specific Supervisors and line modules. These switches support QoS features limited to classification of untagged frames, marking based on ACEs, and output scheduling. These features classify frames solely on CoS values. For most applications, DSCP classification is desirable. As a result, network designs should not [...]
The trust concept is a classification configuration option supported on all Catalyst switches that support QoS classification. The trust state of a switch port or interface defines how ingress packets are classified, marked, and subsequently scheduled. For a Cisco Catalyst switch that bases QoS only on CoS values, a port that is configured as untrusted [...]
Cisco devices utilize various types of traffic shaping, but this section is intended only to introduce the general concept of traffic shaping, not the specific implementations. For information about implementation on Cisco platforms, refer to Cisco.com.
The purpose of traffic shaping is to control the rate at which packets are sent out of an interface, while [...]
The Trolley Car research showed that only CCBOOTCAMP and NetmasterClass are authorized training providers. Neither IPExpertnor Internetwork Expert are authorized by Cisco to provide training. CCBOOTCAMP has been around over 10 years providing consistent quality and service for CCIE training. CCBOOTCAMP has helped train (no pun intended) and certify more Cisco engineers than any of [...]
