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MVP Guru

VSX Configuration - Best Practices - AOS-CX 10.4

Dear community,

Here is a technical white paper on VSX Best Practices.

There are three main use-cases being detailed with step-by-step configuration. You can also jump to the appendixes to find configuration files and copy/paste. I hope you'll find this document useful for your projects.

:

https://support.hpe.com/hpsc/doc/public/display?docId=a00094242en_us

 

Have a great Christmas time.

Vincent

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MVP Guru

Re: VSX Configuration - Best Practices - AOS-CX 10.4

Great guide Giles!

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MVP Guru

Re: VSX Configuration - Best Practices - AOS-CX 10.4

Small update: the guide has been updated with a new appendix (F)

dealing with site-to-site L2 extension with interconnection between two VSX pairs.

 

https://support.hpe.com/hpesc/public/docDisplay?docId=a00094242en_us

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New Contributor

Re: VSX Configuration - Best Practices - AOS-CX 10.4

Is it possible to create a VSX cluster between 2 6405 switches, interconnected by 4 x 25Gbps ISL that is 4500m long, and running AOS-CX 10.4 release?

All Guides reference 10,40 and 100 Gas appropriate speeds. I could not find 25G as a valid interconnection speed. Is it due to its newness or are there underlying technical issue I ignore

 

Thank you

Miguel Monteiro da Cruz
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MVP Guru

Re: VSX Configuration - Best Practices - AOS-CX 10.4

Hi Miguel, personally I really don't see any restriction in deploying the VSX ISL LAG between your two Aruba 6400 Switches by using two or more SFP28 (25 Gbps) physical interfaces at least as long as you're fulfilling well known VSX ISL related requirements (as example: use same speed interfaces, prefer 9128 MTU, prefer higher speed interfaces - among other available - for ISL LAG members) and restrictions (as example: do not use more than 8 aggregated interface).

 

Theoretically you could aggregate up to eight 25G physical interfaces to form the VSX ISL LAG, this on each VSX peer (and supposing you have just 2 modules with SFP28 interfaces available, if I were you I would distribute those 8 - or less - links across both modules to implement physical resiliency against a module failure...but that's a normal approach, pretty much independent by the interfaces chosen...just a best practice to follow when possible).

 

Directly from the Aruba VSX Configuration Best Practices for Aruba CX 6400, 8320, 8325, 8400 Technical Whitepaper for AOS-CX Version 10.4 (Edition 1.1 January 2020):

 

VSX_ISL.png

 

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New Contributor

Re: VSX Configuration - Best Practices - AOS-CX 10.4

Thank you for putting my mind at ease

Miguel Monteiro da Cruz
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MVP Guru

Re: VSX Configuration - Best Practices - AOS-CX 10.4

no problem with 2x25G. Just make sure ther eis enough BW in case of some failure scenarios (liek one uplink fails).

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