[j-nsp] MX960 - DPCE cards / CPU usage

[Daniel Dagan]

Combination of DPC and full route is usually not a good idea, considering
the size of the full route these days.

Best thing you can do is of course replacing them with MPC cards.

If not possible I think FIB Localization might do the trick for you - must
say I havn't tried it myself, just make sure the routers uplinks are on the
MPC before you try it

https://www.juniper.net/documentation/en_US/junos/topics/topic-map/fib-localization.html


Daniel

On Mon, Apr 20, 2020, 21:29 Dario Amaya <darioamaya82 at gmail.com> wrote:

> Hello,
>
> We're running a couple of MX960 in our datacenter, carrying a full
> table in BGP and running full MPLS services, fast-reroute/RSVP/LDP
> etc. There are two LSP's in full mesh with two other routers. (the
> 960's are not edge routers, so no peering/transit terminate on them).
>
> Hardware as follows:
>
> 2x RE-S-2000-4096-S
> 2x DPCE-R-20GE-2XGE
> 2x MPC-3D-16XGE-SFPP
>
> The RE's are on 16.2R2-S11 which is the last service release supported
> on these RE's. I wasn't sure if 17.3R3 supported 32-bit, or would even
> work at all on these RE's?
>
> I'm seeing the CPU on the DPC's hitting 100% in spikes every 5-10
> minutes or so, which we did not see on JUNOS 13.3. The most concerning
> thing is that we're seeing some packet-loss on traffic transiting the
> DPC's at the same time. 1 to 2% packet loss every 10 minutes or so
> through the router. This of course does not occur on the MPC which
> runs smoothly with no spikes. There's no more than 400Mbps transiting
> the router.
>
> > show pfe statistics traffic fpc 6 | match discard
> Packet Forwarding Engine hardware discard statistics:
>     Timeout                    :                    0
>     Normal discard             :               217186
>     Extended discard           :                    0
>
> What would you suggest here? Is this being caused by the JUNOS version
> we're running?
>
> Any tips appreciated.
>
> Thanks
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