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6509 + SUP720 + CSM redundancy

Hi everyone,

Just cuirious if anyone has setup something similar before. We have a clustered setup for customers, where we setup a virtual server on the 6509 which then load balances across multiple servers.

What I want to do is somehow track the servers and if they are unavailible, redirect incoming traffic for that VIP to another server (which has a "sorry we are down at the moment") automatically.

Any help/info would be appreciated.

3 REPLIES
Anonymous
N/A

Re: 6509 + SUP720 + CSM redundancy

EHSA (Enhanced High System Availability) is redundancy feature available when

cat6500 is running Native IOS. EHSA provides auto-startup and bootvar sync

between active and standby supervisors. However, the image has to be manually

sync'ed between the two supervisors.

There are three redundant configuration elements that can be enabled or disabled.

startup-config

config-registers

bootvar

"auto-sync standard" command synchronizes the starup-config, config-register

and the bootvar configuration of the active supervisor engine with the

redundant supervisor engine.

Router(config)# redundancy [ Enter redundancy configuration mode ]

Router(config-r)# main-cpu [Enter main-cpu configuration submode ]

Router(config-r-mc)# auto-sync standard

[auto-sync {startup-config | config-register | bootvar | standard} ]

Router(config-r-mc)# end [Return to privileged EXEC mode ]

Router# copy running-config startup-config

Silver

Re: 6509 + SUP720 + CSM redundancy

I believe the CSM supports the 'Sorry Server' feature aka back-up server.

Take a look at the following URL:

<http://www.cisco.com/en/US/products/hw/modules/ps2706/products_data_sheet0900aecd801c5cbb.html>

hth

Ajaz Nawaz

Re: 6509 + SUP720 + CSM redundancy

Thanks for that anawaz, exactly the information I was after.

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