Introduction Classifier Management
Software Reference for SwitchBlade x3100 Series Switches (Access and Security)
6-8
• Ingress Meters (TRAFFIC DESCRIPTORs) are limited to 1 per classifier. Their actions on out-of-profile
packets are NCFORWARD (the default), NCDROP, and NCCOUNT.
• All interfaces support p-bit mapping to queues.
• All interfaces support only Strict Priority, Tail-drop queuing discipline.
The following classifier match fields are not supported on the SBx3112, which affects the CREATE/SET CLASSI-
FIER commands:
• INNERVPRIORITY
• INNERVID
• TCPFLAGS
• IPTOS
• ETHFORMAT
The following classifier actions are not supported on the SBx3112, which affects the ADD ACTION command:
• MOVEPRIOTOTOS
• MOVETOSTOPRIO
• SETIPTOS
6.3.2 Classifier Management
Classifiers provide the remarking, metering, counting, etc., actions for interfaces. Classifiers define packet
matching rules that classify packets into data flows so that they may be processed in a similar manner. For
example, all packets with the same destination TCP/IP port may be defined to form a flow (such as Telnet or
HTTP traffic).
Once packets are defined by the use of classifiers, the QoS functions associate the classifier rule and subse-
quent actions on the packets.
Classifiers perform the following key functions:
• Traffic filtering - Filters traffic so that only required traffic goes on to the VLAN. Sample filters would be by
protocol, IP address and applications such as HTTP or SMTP.
• Traffic quality of service - Prioritizes frames based on their classification. For instance, voice over IP traffic
could be given a higher priority than web traffic.
6.3.2.1 Classifier Match Rules
A set of packet matching rules can be created by the user. The classifiers can identify any single packet based
upon the following criteria:
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