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Catalyst 6000 Family Content Switching Module Installation and Configuration Note
78-11631-02 Rev. A0
Configuring the Content Switching Module
This example shows how to configure a virtual server named barnett, associate it with the server farm
named bosco, and configure a sticky connection with a duration of 50 seconds to sticky group 12:
Router(config)# ip slb vserver barnett
Router(config-slb-vserver)# virtual 12.3.23.4 tcp 34
Router(config-slb-vserver)# serverfarm bosco
Router(config-slb-vserver)# sticky 50 group 12
Router(config-slb-vserver)# end
Router# show ip slb vservers
Configuring TCP Parameters
Transmission Control Protocol (TCP) is a connection-oriented protocol that uses known protocol
messages for activating and deactivating TCP sessions. In server load balancing, when adding or
removing a connection from the connection database, the Finite State Machine correlates TCP signals
such as SYN, SYN/ACK, FIN, and RST. When adding connections, these signals are used for detecting
server failure and recovery and for determining the number of connections per server.
Note The CSM also supports User Datagram Protocol (UDP). Because UDP is not connection-oriented,
protocol messages cannot be generically sniffed (without knowing details of the upper-layer
protocol) to detect the beginning or end of a UDP message exchange. Detection of UDP connection
termination is based on a configurable idle timer. Protocols requiring multiple simultaneous
connections to the same real server (such as FTP) are supported. Internet Control Management
Protocol (ICMP) messages (such as ping) destined for the virtual IP address are also handled.
To configure TCP parameters, perform this task:
This example shows how to configure TCP parameters for virtual servers:
Router(config)# ip slb vserver barnett
Router(config-slb-vserver)# idle 10
Configuring Dynamic Feedback Protocol
Configuring the Dynamic Feedback Protocol (DFP) allows servers to provide feedback to the CSM to
enhance load balancing. The DFP mechanism in server load balancing allows host agents (residing on the
physical server) to dynamically report the change in status of the host systems providing a virtual service.
Command Purpose
Step 1
Router(config)# ip slb vserver
virtserver-name
Identify the virtual server and enter the virtual server
configuration mode
1,2
.
1. Enter the exit command to leave a mode or submode. To return to the Router (config)> top level of the menu, enter
the end command.
2. The no form of this command restores the defaults.
Step 2
Router(config-slb-vserver)# idle duration
Configure the amount of time (in seconds)
connection information is maintained in the absence
of packet activity for a connection
2
.
