[j-nsp] Finding drops

Tim Warnock timoid at timoid.org
Tue Jan 22 15:36:42 EST 2019


You're looking in the wrong place :)

You might better understand if you look here: https://en.wikipedia.org/wiki/Ethernet_frame

> -----Original Message-----
> From: juniper-nsp [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf
> Of Jason Lixfeld
> Sent: Tuesday, 22 January 2019 6:09 AM
> To: Juniper List <juniper-nsp at puck.nether.net>
> Subject: [j-nsp] Finding drops
> 
> Hi all,
> 
> I’m doing some RFC2544 tests through an MX204.  The tester is connected to
> et-0/0/2, and the test destination is somewhere out there via et-0/0/0.  64
> byte packets seem to be getting dropped, and I’m trying to find where on
> the box those drops are being recorded.
> 
> I’ve distilled the test down to generating 100 million 64 byte (UDP) packets to
> the destination, but the counters on et-0/0/2 read as though they’ve only
> received about 76.6% of those packets.
> 
> If I change the test to send 100 million 100 byte packets, the counters on et-
> 0/0/2 account for all packets.
> 
> I’ve tried looking at various output to find a counter that registers the missing
> packets, but I’m not having any luck.
> 
> Aside from 'show interface et-0/0/2 extensive’, I’ve looked here with no
> luck:
> 
> show interface queue et-0/0/2
> show pfe statistics traffic detail
> show pfe statistics exceptions
> show pfe statistics error
> 
> Somewhere else I should be looking?
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