Cisco Systems 6000 manual TCP Probe, FTP, SMTP, and Telnet Probe, DNS Probe Submode

Configuring Probes for Health Monitoring

TCP Probe

A TCP probe establishes and removes connections. The ip slb probe tcp command enters the TCP probe configuration mode. All the common ip slb probe commands are supported.

	Command	Purpose
Step 1
	Router(config)# ip slb probe probe-nametcp	Configure a TCP probe and enter the TCP probe
		submode1.
Step 2	Router(config-slb-probe-tcp)# [expect	Configure the intervals to wait between probes of a
	failed interval open receive	failed server and between probes. Also, specify the
	retries]	time to make a TCP connection, to receive a reply
		from the server, and to limit the number of retries
		before considering the real server as failed.

1.The no form of this command restores the defaults.

FTP, SMTP, and Telnet Probe

An FTP, SMTP, or Telnet probe establishes a connection to the real server and verifies that a greeting from the application was received. The ip slb probe (ftp, smtp, or telnet) command enters the corresponding probe configuration mode. All the ip slb probe common options are supported. Multiple status ranges are supported, one command at a time.

To configure a status code to expect from the FTP, SMTP, or Telnet probe, perform this task:

	Command	Purpose
Step 1
	Router(config)# ip slb probe probe-name[ftp	Configure an FTP, SMTP, or Telnet probe and enter
	smtp telnet]	the FTP, SMTP, or Telnet probe submode1.
Step 2
	Router(config-slb-probe-ftp)# [expect status	Configure the intervals to wait between probes of a
	min-number [max-number] failed interval	failed server and between probes. Also, specify the
	retries receive]	time to make a TCP connection, to receive a reply
		from the server, and to limit the number of retries
		before considering the real server as failed.

1.The no form of this command restores the defaults.

DNS Probe Submode

A DNS probe sends a domain name resolve request to the real server and verifies the returned IP address. The ip slb probe dns command places the user in DNS probe configuration submode. All the ip slb probe common options are supported except open, which is ignored.

	Catalyst 6000 Family Content Switching Module Installation and Configuration Note
50	78-11631-02 Rev. A0