[j-nsp] juniper-nsp Digest, Vol 193, Issue 24

[Amarjeet Singh]

> I do agree with Emille, feel free to hit provide feedback for
> documentation.


I would recommended to disable periodic-refresh for BBE.
There is KB which explains this.

https://kb.juniper.net/InfoCenter/index?page=content&id=KB27474

set accounting-options periodic-refresh disable

Periodic-refresh is disabled to change the default behavior for statistics
collection. Before Broadband Edge (BBE), statistics were constantly
collected by Junos. This consumes CPU cycles that are needed by BBE for
call setup. So, an option to only collect statistics on demand was needed.
Disabling periodic refresh makes the change in statistics collection to on
demand. There is no negative impact to statistics accuracy or rate when set
this way.

Br, Amarjeet


>
>
>
> Message: 3
> Date: Fri, 21 Dec 2018 08:21:29 -0800
> From: Emille Blanc <emille at abccommunications.com>
> To: Sebastian Wiesinger <sebastian at karotte.org>,
>         "juniper-nsp at puck.nether.net" <juniper-nsp at puck.nether.net>
> Subject: Re: [j-nsp] SNMP_EVLIB_FAILURE - snmp not working anymore
> Message-ID: <4FBAFC2ECF5D6244BA4A26C1C94A1E270D7A4DEFBE at exchange>
> Content-Type: text/plain; charset="us-ascii"
>
> Juniper has always been accommodating in my occasional request to provide
> disambiguation to KB's or PR's, whenever I use the feedback widget.
> Let them know your thoughts.
>
> -----Original Message-----
> From: juniper-nsp [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf
> Of Sebastian Wiesinger
> Sent: Friday, December 21, 2018 4:48 AM
> To: juniper-nsp at puck.nether.net
> Subject: Re: [j-nsp] SNMP_EVLIB_FAILURE - snmp not working anymore
>
> * Olivier Benghozi <olivier.benghozi at wifirst.fr> [2018-12-21 02:05]:
> > PR1270686
> >
> > restart statistics-service
>
> This PR is one example of something I don't like in most Juniper PRs.
> It states the command you quoted but then there is also this text:
>
> Workaround:
>
> Disable pfed's periodic refresh using config:
> set accounting-options periodic-refresh disable
>
> Nowhere in this PR is explained what that does and what possible
> side-effects are. You only find this exact command in a post on the
> Juniper forums:
>
>
> > set accounting-options periodic-refresh disable
> > -->Periodic-refresh is disabled to change the default behavior for
> > stats collection. Pre-BBE, stats were constantly collected in JUNOS.
> > This uses CPU cycles that are needed for call set up.
> > -->With the introduction of BBE in JUNOS, we needed to change the
> > behavior for stats to be on demand. That is what disabling
> > periodic-refresh does. There is no negative impact to accurate stats
> > or interim stats.
> > -->Without this disabled, accounting will be very inefficient and not
> > scale.
>
> This might be the correct explanation or it might be just a text from
> someone who wants to gain "kudos" so that he can get to the next level
> in the Juniper Support pantheon aka "The Stack Exchange disease".
>
> Either way it would be very nice if Juniper would post some more
> information on *what* a workaround does and when it would not be wise
> to use it. In this case you should probably not use the workaround if
> you have a scaled BBE setup I would imagine.
>
> Regards
>
> Sebastian
>
> --
> GPG Key: 0x58A2D94A93A0B9CE (F4F6 B1A3 866B 26E9 450A  9D82 58A2 D94A 93A0
> B9CE)
> 'Are you Death?' ... IT'S THE SCYTHE, ISN'T IT? PEOPLE ALWAYS NOTICE THE
> SCYTHE.
>             -- Terry Pratchett, The Fifth Elephant
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>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 21 Dec 2018 10:34:27 -0600
> From: "Aaron Gould" <aaron1 at gvtc.com>
> To: <juniper-nsp at puck.nether.net>
> Subject: [j-nsp] qfx5120-48y-8c - jtac recommeded junos version
> Message-ID: <000601d4994b$0ab29660$2017c320$@gvtc.com>
> Content-Type: text/plain;       charset="us-ascii"
>
> I got my QFX-5120's in a couple days ago. running 18.3R1.11
>
>
>
> I don't see a JTAC Recommendation for 5120
>
>
>
> https://kb.juniper.net/InfoCenter/index?page=content
> <https://kb.juniper.net/InfoCenter/index?page=content&id=KB21476>
> &id=KB21476
>
>
>
> {master:0}
>
> root> show system information
>
> Model: qfx5120-48y-8c
>
> Family: junos-qfx
>
> Junos: 18.3R1.11
>
>
>
>
>
> - Aaron
>
>
>
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> End of juniper-nsp Digest, Vol 193, Issue 24
> ********************************************
>