Monitoring and Analyzing Switch Operation

Traffic Mirroring

2.Create an IPv4 or IPv6 traffic class using the class command to select the packets that you want to mirror in a session on a preconfigured local or remote destination device.

Context: Global configurationSyntax: [no] class < ipv4 ipv6 > <classname >

Defines the name of a traffic class and specifies whether a policy is to be applied to IPv4 or IPv6 packets, where

< classname > is a text string (64 characters maximum). After you enter the class command, you enter the class configuration context to specify match criteria. A traffic class contains a series of match and ignore commands, which specify the criteria used to classify packets.

To configure a default traffic class, use the default-classcommand as described below. A default class manages the packets that do not match the match/ignore criteria in any other classes in a policy.

A traffic class consists of match criteria, which consist of match and ignore commands.

•match commands define the values that header fields must contain for a packet to belong to the class and be managed by policy actions.

•ignore commands define the values which, if contained in header fields, exclude a packet from the policy actions configured for the class.

N o t e

Be sure to enter match/ignore statements in the precise order in which

 

you want their criteria to be used to check packets.

 

 

The following match criteria are supported in match/ignore statements for inbound IPv4/IPv6 traffic:

•IP source address (IPv4 and IPv6)•IP destination address (IPv4 and IPv6)•IP protocol (such as ICMP or SNMP)•Layer 3 IP precedence bits•Layer 3 DSCP codepoint•Layer 4 TCP/UDP application port (including TCP flags)•VLAN ID

Enter one or more match or ignore commands from the class configuration context to filter traffic and determine the packets on which policy actions will be performed.

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