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Switchover time for two-stack SG500X setup

pch0000011
Level 1
Level 1

We are considering purchasing and stacking two SG500X switches, but whether it makes sense depends entirely on the failover time.

Judging from the manual, if the backup fails, the failover time is practically immediate, but if the master fails, the backup needs to reinitialize into master state during which it doesn't forward packets.

Quote from the manual:

The backup unit becomes the master, and all of its processes and protocol stacks
are initialized to take responsibility for the entire stack. As a result, there is
temporarily no traffic forwarding in this unit, but slave units remain active.

But what does that really mean? Are we talking a few seconds or is it minutes?! I've found claims of both on the Internet.

2 Replies 2

Ingrid Aragon
Level 1
Level 1

Thanks for contacting Cisco support community center. I am really sorry for the inconvenience caused and delayed response.

There is a specialized department that can provide you the accurate information in regards your inquiry, find below the contact information.

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manhattan11
Level 1
Level 1

Hi Pch0000011

I was wondering to myself the same question, Did you get an answer?

Because we already get 2 of these switches but I want to be sure about failover time before buy others.

I didn't find any SSO or RPR redundancy mode as for other Cisco versions.

Plaese help

thanks

Angelo