Chapter 42 Configuring PFC QoS

Configuring PFC QoS

Class Map Filtering Guidelines and Restrictions

When configuring class map filtering, follow these guidelines and restrictions:

•With Release 12.2(18)SXE and later releases, PFC QoS supports multiple match criteria in class maps configured with the match-anykeywords.

•With releases earlier than Release 12.2(18)SXE, PFC QoS supports class maps that contain a single match command.

•With Release 12.2(18)SXE and later releases, the PFC3 supports the match protocol ipv6 command.

•Because of conflicting TCAM lookup flow key bit requirements, you cannot configure IPv6 DSCP-based filtering and IPv6 Layer 4 range-based filtering on the same interface. For example:

–If configure both a DSCP value and a Layer 4 greater than (gt) or less than (lt) operator in an IPv6 ACE, you cannot use the ACL for PFC QoS filtering.

–If configure a DSCP value in one IPv6 ACL and a Layer 4 greater than (gt) or less than (lt) operator in another IPv6 ACL, you cannot use both ACLs in different class maps on the same interface for PFC QoS filtering.

•Release 12.2(18)SXE and later releases support the match protocol ip command for IPv4 traffic.

•PFC QoS does not support the match cos, match any, match classmap, match destination-address,match input-interface,match qos-group, and match source-address class map commands.

•Cisco 7600 series routers do not detect the use of unsupported commands until you attach a policy map to an interface.

•The PFC2 support the match protocol class map command, which configures NBAR and sends all traffic on the Layer 3 interface, both ingress and egress, to be processed in software on the MSFC2. To configure NBAR, refer to this publication:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t8/dtnbarad.htm

•Filtering based on IP precedence or DSCP for egress QoS uses the received IP precedence or DSCP. Egress QoS filtering is not based on any IP precedence or DSCP changes made by ingress QoS.

Note This chapter includes the following ACL documentation:

•Configuring MAC ACLs, page 42-66

•Configuring ARP ACLs for QoS Filtering, page 42-69

Other ACLs are not documented in this publication. See the references under access-listin the “PFC QoS Policy Configuration Overview” section on page 42-65.

Configuring Filtering in a Class Map

To configure filtering in a class map, perform one of these tasks:

 

Command

Purpose

 

 

 

 

Router(config-cmap)#match access-group name

(Optional) Configures the class map to filter using an ACL.

 

acl_index_or_name

 

 

 

 

 

Router(config-cmap)#no match access-group name

Clears the ACL configuration from the class map.

 

acl_index_or_name

 

 

 

 

 

 

 

 

 

 

Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX

 

 

 

 

 

 

 

 

 

 

OL-4266-08

 

 

42-71

 

 

 

 

 

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Cisco Systems OL-4266-08 Class Map Filtering Guidelines and Restrictions, Configuring Filtering in a Class Map, 42-71
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OL-4266-08 specifications

Cisco Systems OL-4266-08 is a robust and versatile certification that focuses on the essentials of implementing and troubleshooting Cisco collaborations solutions. As enterprises increasingly rely on unified communications, having professionals who are knowledgeable in the latest Cisco technologies becomes a necessity. This certification is part of the Cisco Certified Network Associate (CCNA) program, which serves as a foundational stepping stone for individuals aspiring to build a career in networking and collaboration technologies.

One of the main features of OL-4266-08 is its emphasis on collaboration foundations, which includes an understanding of voice, video, messaging, and conferencing technologies. Professionals who obtain this certification demonstrate proficiency in deploying, configuring, and troubleshooting Cisco collaboration solutions like Cisco Unified Communications Manager and Cisco Webex. This knowledge is critical as businesses seek to enhance communication and productivity through integrated systems.

Technologically, OL-4266-08 covers a wide array of essential concepts, including IP telephony, voicemail, and collaborative tools. Candidates learn about the architecture of unified collaboration systems, involving integration with routing and switching networks. Additionally, it delves into security protocols to ensure secure transmissions of voice and video data, thereby protecting sensitive corporate communication.

In terms of characteristics, OL-4266-08 is designed to be both comprehensive and practical. The certification emphasizes hands-on experience, which is essential for understanding real-world applications of Cisco technologies. The coursework provides extensive exposure to simulations and labs that mimic actual network environments. This hands-on approach enables candidates to troubleshoot issues effectively using Cisco's troubleshooting tools and methodologies.

Moreover, the certification aligns with industry standards, ensuring that individuals gain relevant and in-demand skills. Given the evolving landscape of network technologies, OL-4266-08 prepares individuals for future growth and specialization in various areas, including cloud collaboration and Internet of Things (IoT) communications.

In conclusion, Cisco Systems OL-4266-08 equips networking professionals with the necessary skills to implement and support Cisco collaboration solutions. The focus on hands-on experience, along with in-depth coverage of technology and security protocols, makes it a valuable certification in the fast-paced world of network communications. With the rise of remote work and digital collaboration, this certification is pivotal for anyone looking to enhance their career in networking and technology.
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