Wired Intelligent Edge (Campus Switching and Routing)

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Occasional Contributor II

Broadcast supression/Storm control - Best practices

Hi everyone,

 

Anyone got any best practices regarding broadcast supression?

 

# pps / # percentages on interfaces?

Broadcast supression on trunked links

...

 

Many thanks in advance!

 

Kind regards,

New Contributor

Re: Broadcast supression/Storm control - Best practices

I have same question. Tried to research online but there is little information. It is not obvious what is the number of broadcasts in a “healthy” network. 

 

Hardening guide (https://community.arubanetworks.com/t5/Wired-Intelligent-Edge-Campus/ArubaOS-Switch-Hardening-Guide-for-16-06-released/td-p/464555) does not cover this subject. And admin guide does not explain the difference b/w Percentage and PPS.

I have seen few years ago gentlemen name was posting amazing guides on various Aruba Switch features. But there is no on Storm Control (at least I was not able to find one).

Have a look at his posts especially with attachments - https://community.arubanetworks.com/t5/forums/recentpostspage/post-type/message/user-id/93757/page/1

The closest one can go is a document titled “Rate_Limit_Unknown_Unicast.docx” at https://community.arubanetworks.com/t5/Wired-Intelligent-Edge-Campus/How-do-you-control-unknown-unicast-traffic-in-ArubaOS-Switch/td-p/415271

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New Contributor

Re: Broadcast supression/Storm control - Best practices

And here is one more great conversation:

 

https://community.hpe.com/t5/Comware-Based/HP-5920-Broadcast-suppression/td-p/6951844#.XZcfTGbTWUk

 

Re: HP 5920 - Broadcast suppression by parnassus
Honored Contributor

I fear there isn't a single valid answer (nor I found an official Best Practice HPE Guide/KB Article about it despite the argument of broadcast/unicast/multicast storm suppression - plus other similar features regarding ARP flooding - is discussed on official HPE switch series documentation): it depends on the type of storm you need to fight against and your network characteristics (knowing nothing about how many pps or kbps the storm can generate and the type of traffic the storm will be formed of...the only reasonable thing to do is starting with restrictive suppression values and fine tune them along the way...say starting with - as example - 128 or 256 pps - restrictive - up to 1024 or 2048 pps - less restrictive - threshold values).

Possible useful threads: here, here and here

MVP Expert

Re: Broadcast supression/Storm control - Best practices

Thanks for linking a thread I was involved in on the HPE Community! nevertheless will be interesting to develop this discussion further...never stop learning.

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