[j-nsp] What exactly causes inconsistent RTT seen using ping utility in Junos?

[Vincent Bernat]

 ❦ 15 avril 2019 15:09 +03, Saku Ytti <saku at ytti.fi>:

>> I'm afraid this is not a valid test to prove the effect of relative process
>> priorities within the RE, doing this you're slowing down the clock on the
>> complete RE simulation as a whole (all simulated processes slowed down
>> equally).
> ..
>
>> Again this could be because these kinds of operations have lower process
>> priority than the process handling ping.
>
> ACK, RPD is involved in ICMP and RIB/FIB management, and to the OS
> it's just single thread (in this context, newer RPD does have few
> separate OS threads). So what you'd need to do, is have RPD run some
> high priority task. BGP churn which will cause FIB changes likely is
> good candidate as way to cause variant delay to ICMP.

Can you confirm that rpd is answering ICMP echo requests? I find this
surprising as I would have expected the FreeBSD kernel to do that.
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