50
Catalyst 6000 Family Content Switching Module Installation and Configuration Note
78-11631-02 Rev. A0
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.
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:
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.
Command Purpose
Step1 Router(config)# ip slb probe probe-name tcp Configure a TCP probe and enter the TCP probe
submode1.
1. The no form of this command restores the defaults.
Step2 Router(config-slb-probe-tcp)# [expect |
failed | interval | open | receive |
retries]
Configure the intervals to wait between probes of a
failed server and between probes. Also, specify the
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.
Command Purpose
Step1 Router(config)# ip slb probe probe-name [ftp
| smtp | telnet]
Configure an FTP, SMTP, or Telnet probe and enter
the FTP, SMTP, or Telnet probe submode1.
1. The no form of this command restores the defaults.
Step2 Router(config-slb-probe-ftp)# [expect status
min-number [max-number] | failed | interval
| retries | receive]
Configure the intervals to wait between probes of a
failed server and between probes. Also, specify the
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.