SSO Redundancy mode

Answered Question
Sep 1st, 2009

Hello,

Working with a 6500 chassis running on a single SUP720-3B.

For some reason, the power redundancy mode is showing "mode sso".

What's the proper config mode for a single sup chassis and how to change that?

redundancy

mode sso

main-cpu

auto-sync running-config

Thanks

Jeremy

I have this problem too.
0 votes
Correct Answer by Giuseppe Larosa about 7 years 3 months ago

Hello Jeremy,

as Kevin has noted these commands should have no effect on your single supervisor chassis.

they are probably inserted by default in the IOS image you are using to make the system ready for addition of a second supervisor.

Hope to help

Giuseppe

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Yudong Wu Tue, 09/01/2009 - 08:19

You don't need worry about those commands since you only have one SUP. It won't impact anything.

Correct Answer
Giuseppe Larosa Tue, 09/01/2009 - 10:32

Hello Jeremy,

as Kevin has noted these commands should have no effect on your single supervisor chassis.

they are probably inserted by default in the IOS image you are using to make the system ready for addition of a second supervisor.

Hope to help

Giuseppe

anjery1234 Wed, 09/02/2009 - 03:53

Giuseppe,

I have a very strong feeling that the sso mode is inserted by default in the ios image but I haven't come accross any documentation to support that.

Have you?

Thanks

Giuseppe Larosa Wed, 09/02/2009 - 05:32

Hello Jeremy,

I have experimental evidence in a campus with 6509 used as distribution switches I see:

sh run | beg redundancy

redundancy

keepalive-enable

mode sso

main-cpu

auto-sync running-config

!

sh ver | inc image

System image file is "disk0:s72033-advipservicesk9_wan-mz.122-33.SXH2.bin"

on other systems running 12.2(18)SXF14

h run | beg redundancy

redundancy

mode rpr-plus

main-cpu

auto-sync running-config

auto-sync standard

!

sh ver | inc image

System image file is "sup-bootflash:c7600s72033-advipservicesk9_wan-mz.122-18.SXF14.bin"

all these systems have a single processor on the chassis.

Actually, 12.2SXH config guide says that you need to enter mode sso in redundancy config mode to have SSO but there is evidence it is enabled by default because it is the basis for NSF operations.

Hope to help

Giuseppe

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