Cisco Catalyst 6500 Series Configuration Note

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Catalyst 6500 Series Content Switching Module Configuration Note
OL-4612-01
Chapter 9 Configuring Health Monitoring
Configuring Inband Health Monitoring
To specify the domain name resolve request, perform this task:
Configuring Inband Health Monitoring
These sections describe inband health monitoring:
• Understanding Inband Health Monitoring, page 9-7
• Configuring Inband Health Monitoring, page 9-7
Understanding Inband Health Monitoring
To efficiently balance connections, the CSM must continuously monitor the health of all real servers in
its configuration. The inband health monitoring feature is configured for each server farm to monitor the
health of the servers. The parameters configured per server farm are then applied to each real server in
that server farm. You can configure the number of abnormal end sessions that occur before the system
considers the real server unreachable and you also can specify a time to wait before a real server is
reintroduced into the server farm and a connection attempt is made.
This feature works with health probes. If health probes and inband health monitoring are both configured
on a particular server, both sets of health checks are required to keep a real server in service within a
server farm. If either health-checking feature finds a server out of service, the server will not be selected
by the CSM for load balancing.
Configuring Inband Health Monitoring
To configure inband health monitoring, follow these steps:
Step 1 Verify that you have configured server farms. (See the “Configuring Server Farms” section on
page 5-1.)
Step 2 Enter the serverfarm submode command to enable inband health monitoring for each server farm:
Router(config-module-csm)# serverfarm serverfarm-name
Router(config-slb-sfarm)# health retries count failed seconds
Command Purpose
Step 1
Router(config-module-csm)# probe probe-name
dns
Configures a DNS probe and enters the tcp
probe submode
1
.
1. The no form of this command restores the defaults.
Step 2
Router(config-slb-probe-dns)# [failed |
interval | retries | receive]
Configures the times to wait between probes to
make a DNS connection, to receive a reply from
the server, and to limit the number of retries
before considering the real server as failed.

Cisco Catalyst 6500 Series Specifications

General

Brand	Cisco
Model	Catalyst 6500 Series
Category	Switch
Language	English