Cisco Systems 6000 manual Configuring Real Servers

Configuring the Content Switching Module

This example shows how to configure a server farm, named p1_nat, using the least-connections

(leastconns) algorithm. The least-connections algorithm specifies which real server handles the next new connection for this server farm.

Router(config)# ip slb serverfarm pl_nat

Router(config-slb-sfarm)# predictor leastconns

Configuring Real Servers

Real servers are physical devices assigned to a server farm. Real servers provide the services that are load balanced. When the server receives a client request, it pulls matching information from a disk and sends it to the CSM for forwarding to the client.

You configure the real server in the real server configuration mode by specifying the server IP address and port when you assign it to a server farm. You enter the real server configuration mode from the serverfarm mode where you are adding the real server.

To configure real servers, perform this task:

	Command	Purpose
Step 1
	Router(config-slb-sfarm)# real	Identify a real server as a member of the server farm and
	ip-address [port]	enter the real server configuration mode. An optional
		translation port can also be configured1, 2.
Step 2	Router(config-slb-real)# weight	(Optional) Set the weighting value for the virtual server
	weighting-value	predictor algorithm to assign the server’s workload
		capacity relative to the other servers in the server farm if
		the round robin or least connection is selected2.
Step 3	Router(config-slb-real)# maxconns	(Optional) Set the maximum number of active
	max-conns	connections on the real server2. When the specified
		maximum is reached, no more new connections are sent
		to that real server until the number of active connections
		drops below the minimum threshold.
Step 4	Router(config-slb-real)# minconns	(Optional) Set the minimum connection threshold2.
	min-conns
Step 5	Router(config-slb-real)# inservice	Enable the real server for use by the CSM2.
		Note	Repeat Steps 1 through 5 for each real server you
			are configuring.
Step 6
	Router# show ip slb reals [sfarm	(Optional) Display information about configured real
	serverfarm-name] [detail]	servers. The vserver option limits the display to real
		servers associated with a particular virtual server. The
		detail option displays detailed real server information.
Step 7
	Router# show ip slb conns [sfarm	Display active connections to the CSM. The sfarm
	vserver virtserver-name] [client	option limits the display to connections associated with
	ip-address] [detail]	a particular server farm. The client option limits the
		display to connections for a particular client. The detail
		option displays detailed connection information.

1.Enter the exit command to leave a mode or submode. Enter the end command to return to the menu’s top level.

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

	Catalyst 6000 Family Content Switching Module Installation and Configuration Note
78-11631-02 Rev. A0		25