Configuring Persistent Connections; Configuring Global Server Load Balancing - Cisco catalyst 6500 series Configuration Note

Configuring Persistent Connections

Configuring Persistent Connections
The CSM allows HTTP connections to be switched based on a URL, cookies, or other fields contained
in the HTTP header. Persistent connection support in the CSM allows for each successive HTTP request
in a persistent connection to be switched independently. As a new HTTP request arrives, it may be
switched to the same server as the prior request, it may be switched to a different server, or it may be
reset to the client preventing that request from being completed.
In software release 2.1(1), the CSM supports HTTP 1.1 persistence. This feature allows browsers to send
multiple HTTP requests on a single persistent connection. After a persistent connection is established,
the server keeps the connection open for a configurable interval, anticipating that it may receive more
requests from the same client. Persistent connections eliminate the overhead involved in establishing a
new TCP connection for each request.
HTTP 1.1 persistence is enabled by default on all virtual servers configured with Layer 7 policies. To
disable persistent connections, enter the no persistent rebalance command. To enable persistent
connection, enter the persistent rebalance command.
This example shows how to configure persistent connection:
Router# configure terminal
Enter configuration commands, one per line.
CNTL/Z.
Router(config)# mod csm 2
!!! configuring serverfarm
Router(config-module-csm)# serverfarm sf3
Router(config-slb-sfarm)# real 10.1.0.105
Router(config-slb-real)# inservice
!!! configuring vserver
Router(config-slb-real)# vserver vs3
Router(config-slb-vserver)# virtual 10.1.0.83 tcp 80
Router(config-slb-vserver)# persistent rebalance
Router(config-slb-vserver)# serverfarm sf3
Router(config-slb-vserver)# inservice
Router(config-slb-vserver)# end

Configuring Global Server Load Balancing

This section contains the Content Switching Module (CSM) global server load balancing (GSLB)
advanced feature set option and instructions for its use. You should review the terms of the
License Agreement"
By downloading or installing the software, you are consenting to be bound by the license agreement. If
Note
you do not agree to all of the terms of this license, then do not download, install, or use the software.
Catalyst 6500 Series Content Switching Module Configuration Note
8-8
carefully before using the advanced feature set option.
Chapter 8 Configuring Additional Features and Options
End with
"Software
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