Welcome to this Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about quality of service (QoS) on Cisco IOS routers with Cisco subject matter expert Akash Agrawal.
A communications network forms the backbone of any successful organization. These networks transport a multitude of applications and data, including high-quality video and delay-sensitive data such as real-time voice. The bandwidth-intensive applications stretch network capabilities and resources, but also complement, add value, and enhance every business process. Networks must provide secure, predictable, measurable, and sometimes guaranteed services. Achieving the required QoS by managing the delay, delay variation (jitter), bandwidth, and packet loss parameters on a network becomes the secret to a successful end-to-end business solution. Thus, QoS is the set of techniques to manage network resources.
Akash Agrawal is a customer support engineer in the Cisco High-Touch Technical Support Center in Bangalore, India, supporting Cisco's major service provider customers in routing and Multiprotocol Label Switching (MPLS) technologies. His areas of expertise include routing, switching, MPLS services, traffic engineering, and QoS. He has been in the networking industry for eight years, which includes five years in the service provider industry and three years in Cisco HTTS, and is a dual CCIE, in the routing and switching and service provider tracks.
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Because of the volume expected during this event, Akash might not be able to answer every question. Remember that you can continue the conversation in the Network Infrastructure Community, under the subcommunity LAN, Routing and Switching , shortly after the event. This event lasts through August 1, 2014. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.
Hi,
Please go through below CCO document explaining command "match dscp"
http://www.cisco.com/c/en/us/td/docs/ios/qos/command/reference/qos_book/qos_m1.html#wp1034334
Match dscp matches both ipv4 and ipv6 traffie while match ip dscp matches only ipv4 traffic.
match dscp
To identify one or more differentiated service code point (DSCP), Assured Forwarding (AF), and Certificate Server (CS) values as a match criterion, use the match dscp command in class-map configuration mode. To remove a specific DSCP value from a class map, use the no form of this command.
match [ip] dscp dscp-value [dscp-value dscp-value dscp-value dscp-value dscp-value dscp-value dscp-value]
no match [ip] dscp dscp-value
Syntax Description
For the Cisco 10000 series router, the ip keyword is required.
Command Default
No match criteria is configured.
If you do not enter the ip keyword, matching occurs on both IPv4 and IPv6 packets.
Command Modes
Class-map configuration
Command History
