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Catalyst 6500 Series Switch Content Switching Module with SSL Command Reference
OL-7029-01
Chapter 2 Content Switching Module with SSL Commands
probe
probe
To configure a probe and probe type for health monitoring, and then enter the probe configuration
submode, use the probe command. To remove a probe from the configuration, use the no form of this
command.
probe probe-name {http | icmp | telnet | tcp | ftp | smtp | dns | udp | script}
no probe probe-name
Syntax Description
Defaults This command has no default settings.
Command Modes Module CSM configuration submode
Command History
Usage Guidelines A probe can be assigned to a server farm in serverfarm submode. The UDP probe requires ICMP because
otherwise the UDP probe will be unable to detect when a server has gone down or has been disconnected.
You must associate UDP to the supervisor engine and then configure ICMP.
Because the UDP probe is a raw UDP probe, the CSM uses a single byte in the payload for probe
responses. The CSM does not expect any meaningful response from the UDP application. The CSM uses
the ICMP unreachable message to determine if the UDP application is not reachable. If there is no ICMP
unreachable message in the receive timeout, then the CSM assumes that the probe is operating correctly.
If the IP interface of the real server is down or disconnected, the UDP probe does not know that the UDP
application is unreachable. You must configure the ICMP probe in addition to the UDP probe for any
server.
The CSM uses the DNS probe as the high-level UDP application. You also can use a TCL script to
configure this probe.
probe-name Name of the probe; the character string is limited to 15 characters.
http Creates an HTTP probe with a default configuration.
icmp Creates an ICMP probe with a default configuration.
telnet Creates a Telnet probe with a default configuration.
tcp Creates a TCP probe with a default configuration.
ftp Creates an FTP probe with a default configuration.
smtp Creates an SMTP probe with a default configuration.
dns Creates a DNS probe with a default configuration.
udp Creates a UPD probe with a default configuration.
script Creates a script probe with a default configuration.
Release Modification
CSM release 1.1(1) This command was introduced.
CSM-S release 1.1(1) This command was introduced.