SUP720 Redundancy Configuration Help Please

Answered Question

We want to config 2 6506-E Sup720 MSFC3 with redudant supervisors in the event one fails. I have read the documents regarding SSO but still am not sure how to configure. I have configured both sups with the same configuration and trunked via ethernet cable from the supervisor uplink port. When I do a sh redundancy states command i receive the following


my state = 13 -ACTIVE

peer state = 1 -DISABLED

Mode = Simplex

Unit = Primary

Unit ID = 5


Redundancy Mode (Operational) = sso

Redundancy Mode (Configured) = sso

Redundancy State = Non Redundant

Maintenance Mode = Disabled

Communications = Down Reason: Simplex mode



Any help/guidance would be much apprecitaed. Learning as I go working on these LAN switches.

Correct Answer by Mark Yeates about 8 years 7 months ago

Brian,


What you are trying to cannot be done with the equipment you currently have. SSO redundancy is for supervisor redundancy within the same chassis. There is VSS that will do what you want as shown in the diagram. Here's a link for that.


http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_white_paper0900aecd806ee2ed.html



HTH,

Mark

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Mark Yeates Mon, 09/22/2008 - 10:45
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What commands are you using for SSO? There is no need to have a patch cable between the supervisors for SSO redundancy. Below is a working example of how to configure SSO. Copy this into the primary supervisor and it will reload the second and SSO should work.


redundancy

mode sso

main-cpu

auto-sync standard



HTH,

Mark



Thanks for the reply Mark, I will have to apologize for my earlier description. We have 2 seperate chassis with one SUP720(3) in each. We are planning on running redundant links from the servers and access switches to each chassis. Currently there is a single GE connection from the RJ45 connection on each supervisor. I am trying to determine the best way to link the supervisors in an active/standby configuration.



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Correct Answer
Mark Yeates Mon, 09/22/2008 - 11:39
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Brian,


What you are trying to cannot be done with the equipment you currently have. SSO redundancy is for supervisor redundancy within the same chassis. There is VSS that will do what you want as shown in the diagram. Here's a link for that.


http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_white_paper0900aecd806ee2ed.html



HTH,

Mark

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