Classifier-based match criteria
In classifier-based packet classification, match criteria provide a way to select the packets on which you want to execute QoS actions, such as rate limiting or 802.1p prioritization.
Match criteria are configured by creating a class of IPv4 orIPv6 traffic, which contains one or more match or ignore statements. A traffic class may be used by any classifier-based software feature, such as QoS or port mirroring.
By using classifier-based QoS, you can configure multiple match criteria that search multiple fields in packet headers to select the exact traffic you want to rate limit or prioritize for a port or VLAN interface. A classifier-based QoS policy is especially useful when you want to manage different types of traffic in the same way (for example, to prioritize both IP subnet and voice traffic).