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 configuration
Syntax: [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-class
command 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.
Note 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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