Hello,
I need to configure a 4507 chassis with two SUP 7 installed. I havenot done SUP redundancy comnfiguration and i was owndering if you can help me set in the right direction please!?
Thanks,
Masood
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Hi,
First you need to correctly install HW, following this guide:
Then you have to configure redundancy in IOS:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# redundancy
Switch(config-red)# mode sso
Switch(config-red)# end
It is explained in more details in this document:
You may need to reset standby supervisor for the change to come into affect with a command "redundancy reload peer". The current configured and operation redundancy modes could be checked using "show redundancy" command.
Kind Regards,
Ivan
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Hi,
Have a look at the config guide.
In order for the redundency to work correctly, you would need to configure both sups in SSO mode.
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/01xo/configuration/guide/NSFwSSO.html
HTH
Hi,
First you need to correctly install HW, following this guide:
Then you have to configure redundancy in IOS:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# redundancy
Switch(config-red)# mode sso
Switch(config-red)# end
It is explained in more details in this document:
You may need to reset standby supervisor for the change to come into affect with a command "redundancy reload peer". The current configured and operation redundancy modes could be checked using "show redundancy" command.
Kind Regards,
Ivan
**Please grade this post if you find it useful.
Thanks so much.
so, after I cofigure using thiese command which I assume I am typing comands on teh primary SUP!?, then use: command "redundancy reload peer" to complete the configuration?
to Test: can I slide out the Primary to see if the Standby will take on?
Thanks,
Masood
I hav eseen two different documnets explaining this configuration. one says:
Configuring SUP Engine Redundancy usinh RPR and SSO
the other one says:
Configuring Cisco NSF with SSO Sup engine redundancy
so, what is teh difference here?
Thanks,
Masood
Hi Masood,
Supervisor redundancy is local to the switch, ensuring minimal downtime on acitve sup failure by syncronizing l2/l3 information between them in SSO mode.
NSF builds on top of that and involves at minimum 2 routers, it allows for NSF router to continue forwarding packets when a supervisor engine switchover happens by preventing route-flapping so that the CEF routing table does not time out or the NSF router does not drop routes. An NSF-aware router helps to send routing protocol information to the neighboring NSF router.
This document describes it in details:
Kind Regards,
Ivan
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Thanks Reza.
I am looking at the documnet that you had sent a link. you mentoned it must be configure as SSO initially, correct? so, do I need to change the SSo to to RPR mode at all?
Hi Masood,
SSO is default in new releases, so it should be negotiated on router power up or on inserting a standby supervisor in a already running system (unless you have manually configured RPR or RPR+).
I don't think there is a benefit of reducing redundancy level from SSO to RPR or RPR+. SSO is a more complete mode (sync l2 and l3 function data) and provides minimal downtime switchover (should be sub-second), while RPR+ could take 30 seconds or more. Therefore, it is better to run SSO.
Kind Regards,
Ivan
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Thank you.
Masood
Welcome, Masood! Appreciate if you could rate this and other useful posts as well :-)
Kind Regards,
Ivan