[j-nsp] auto b/w mpls best practice -- cpu spikes

tim tiriche tim.tiriche at gmail.com
Thu Sep 13 05:13:02 EDT 2018


.o issues with convergence or suboptimal paths.  The noc is constantly
seeing high cpu alerts and that was concerning.  Is this normal in other
networks?

Running 14.1R7.4 with mx480/240 mix.
I usually follow the code listed here:
https://kb.juniper.net/InfoCenter/index?page=content&id=KB21476

Which code version have these optimization happened in?


On Wed, Sep 12, 2018 at 2:11 AM Saku Ytti <saku at ytti.fi> wrote:

> Hey Tim,
>
> I'd optimise for customer experience, not CPU utilisation. Do you have
> issues with convergence time, suboptimal paths?
>
> Which JunOS you're running? There are quite good reasons to jump in
> recent JunOS for RSVP, as you can get RSVP its own core, and you can
> get make-before-break LSP reoptimisation, which actually works
> event-driven rather than timer based (like what you have, causing LSP
> blackholing if LSP convergence lasts longer than timers).
>
>
>
>
> On Wed, 12 Sep 2018 at 08:05, tim tiriche <tim.tiriche at gmail.com> wrote:
> >
> > Hi,
> >
> > Attached is my MPLS Auto B/w Configuration and i see frequent path
> changes
> > and cpu spikes.  I have a small network and wanted to know if there is
> any
> > optimization/best practices i could follow to reduce the churn.
> >
> > protocols {
> >     mpls {
> >         statistics {
> >             file mpls.statistics size 1m files 10;
> >             interval 300;
> >             auto-bandwidth;
> >         }
> >         log-updown {
> >             syslog;
> >             trap;
> >             trap-path-down;
> >             trap-path-up;
> >         }
> >         traffic-engineering mpls-forwarding;
> >
> >         rsvp-error-hold-time 25;
> >         smart-optimize-timer 180;
> >         ipv6-tunneling;
> >         optimize-timer 3600;
> >         label-switched-path <*> {
> >             retry-timer 600;
> >             random;
> >             node-link-protection;
> >             adaptive;
> >             auto-bandwidth {
> >                 adjust-interval 7200;
> >                 adjust-threshold 20;
> >                 minimum-bandwidth 1m;
> >                 maximum-bandwidth 9g;
> >                 adjust-threshold-overflow-limit 2;
> >                 adjust-threshold-underflow-limit 4;
> >             }
> >             primary <*> {
> >                 priority 5 5;
> >             }
> >         }
> > _______________________________________________
> > juniper-nsp mailing list juniper-nsp at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/juniper-nsp
>
>
>
> --
>   ++ytti
>


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