Classifier Control Lists Overview

Classifier control lists (CLACLs) specify the criteria by which the router defines a packet flow. Table 3 lists the criteria that you can use to create CLACLs for different types of traffic flows.

Table 3: CLACL Criteria

Type of CLACL

Criteria

ATM

  • CLP
  • Color
  • Traffic class
  • User packet class

Frame Relay

  • Color
  • Mark discard eligibility (DE) bit
  • Traffic class
  • User packet class

GRE

  • Color
  • Traffic class
  • Type-of-service (ToS) byte
  • User packet class

IP

  • Color
  • Destination IP address
  • Destination port
  • Destination route class
  • Internet Control Message Protocol (ICMP)
  • Internet Gateway Management Protocol (IGMP)
  • IP flags
  • IP fragmentation offset
  • Locally destined traffic
  • Protocol
  • Source IP address
  • Source port
  • Source route class
  • Transmission Control Protocol (TCP)
  • Traffic class
  • Type-of-service (ToS) byte
  • User Datagram Protocol (UDP)
  • User packet class

IPv6

  • Color
  • Destination IPv6 address
  • Destination port
  • Destination route class
  • Internet Control Message Protocol version 6 (ICMPv6)
  • IPv6 traffic class
  • Locally destined traffic
  • Multicast Listener Discovery (MLD)
  • Next header
  • Source IPv6 address
  • Source port
  • Source route class
  • Traffic class
  • Transmission Control Protocol (TCP)
  • User Datagram Protocol (UDP)
  • User packet class

L2TP

  • Color
  • Traffic class
  • User packet class

MPLS

  • Color
  • Mark experimental (EXP) bit
  • Traffic class
  • User packet class

VLAN

  • Color
  • Traffic class
  • User packet class
  • User priority

You configure CLACLs with a name and then values to match in the IP datagram header. A CLACL does not include an action: actions take place when a match is included in a policy list.

Note: Do not use the asterisk (*) for the name of a classifier list. The asterisk is used as a wildcard for the classifier-group command.

If you do not specify one of the frame-relay, gre-tunnel, ip, ipv6, l2tp, mpls, or vlan keywords, the router creates an IP classifier list. This version of the command has been deprecated and may be removed in a future release.

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