[outages] Level3 packet loss in Washingon, DC

[Ross Tajvar]

Hi Justin,

What I think Ryan is getting at is that packet loss at a single hop just
means that hop is rate-limiting ICMP. It's not a cause for concern. If you
see cascading loss (loss starting at one hop and persisting through all
subsequent hops), then that *is* a cause for concern.

FWIW I checked my monitoring to a target in Level3's network in DC and I
don't see any issues.

-Ross

On Fri, May 10, 2019 at 9:47 PM Ryan Kearney via Outages <
outages at outages.org> wrote:

> Read this
>
>
> https://www.nanog.org/meetings/nanog47/presentations/Sunday/RAS_Traceroute_N47_Sun.pdf
>
> On Fri, May 10, 2019 at 8:36 PM Justin Kinney via Outages
> <outages at outages.org> wrote:
> >
> > seeing large amounts of packet loss between from Level 3 in Washington,
> DC. Anyone else?
> >
> > Snippet of an MTR:
> >
> >    9.|-- 9-1-21.bear2.Washington111.Level3.net         0.0%    10
> 1.5   1.9   1.3   4.4   0.8
> >  10.|-- ae-1-3502.ear2.Washington12.Level3.net       90.0%    10
> 1.9   1.9   1.9   1.9   0.0
> >  11.|-- ix-ae-36-0.tcore1.aeq-ashburn.as6453.net      0.0%    10
>  15.4   3.5   1.5  15.4   4.4
> >  12.|-- if-ae-2-2.tcore2.aeq-ashburn.as6453.net       0.0%    10  209.4
> 209.6 209.4 210.2   0.0
> >  13.|-- if-ae-12-4.tcore4.njy-newark.as6453.net       0.0%    10  210.1
> 210.2 209.9 210.7   0.0
> >  14.|-- if-ae-1-3.tcore3.njy-newark.as6453.net        0.0%    10  209.0
> 209.0 208.9 209.3   0.0
> >  15.|-- if-ae-15-2.tcore1.l78-london.as6453.net       0.0%    10  208.9
> 209.1 208.9 209.5   0.0
> >  16.|-- if-ae-3-2.tcore1.pye-paris.as6453.net         0.0%    10  209.3
> 209.5 209.3 210.4   0.0
> >  17.|-- if-ae-8-1600.tcore1.wyn-marseille.as6453.net  0.0%    10  200.6
> 201.9 200.4 213.4   4.0
> >  18.|-- if-ae-5-6.tcore1.mlv-mumbai.as6453.net       90.0%    10  211.0
> 211.0 211.0 211.0   0.0
> >  19.|-- if-ae-2-2.tcore2.mlv-mumbai.as6453.net        0.0%    10  203.6
> 203.8 203.5 204.1   0.0
> >  20.|-- if-ae-9-2.tcore2.cxr-chennai.as6453.net       0.0%    10  203.6
> 205.6 203.1 225.6   7.0
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