12 Nov
2020
12 Nov
'20
6:17 p.m.
Dan,
Tried both from the office and at home....this is pretty representative of what I see from
both locations..
--- ampr.org ping statistics ---
100 packets transmitted, 67 received, 33% packet loss, time 99798ms
rtt min/avg/max/mdev = 32.771/37.410/62.854/5.015 ms
--- 132.249.21.111 ping statistics ---
100 packets transmitted, 71 received, 29% packet loss, time 99697ms
rtt min/avg/max/mdev = 33.062/36.580/50.200/3.406 ms
Thanks
-Albert
-----Original Message-----
From: Daniel E Andersen [mailto:dea@caida.org]
Sent: Thursday, November 12, 2020 11:59 AM
To: Albert Lawson <wb7awl(a)LAWSONPC.COM>OM>; AMPRNet working group
<44net(a)mailman.ampr.org>
Subject: Re: [44net] Lost Packets
So, I've been told by the UCSD folks that CENIC completed some maintenance involving
the LA and Pomona routes this morning. It's perhaps wishful thinking on my part, but
are folks still seeing packet loss? I have not been able to replicate the issue, so for
now must rely on this list for debugging information.
Another possible data point that may be of use. SDSC's website www.sdsc.edu
(132.249.21.111 ) should be topologically identical ( or near enough that it shouldn't
matter ). If packet loss to this machine is significantly different than to 44.0.0.1,
that points us to possible routing issues over a more physical issue.
Dan
On 11/11/20 9:15 PM, Albert Lawson wrote:
Dan,
Please keep us posted on USCD's response. I'm experiencing a 30% packet loss to
the gateway tonight and that's not acceptable. I don't want to make waves or
cause trouble....but this is not sustainable. The packet loss started again tonight
around 5PM (PST) and has so far made a complete mess of two of our DMR nets.
73's
-Albert
WB7AWL
-----Original Message-----
From: 44Net [mailto:44net-bounces+wb7awl=lawsonpc.com@mailman.ampr.org] On Behalf Of
Daniel E Andersen via 44Net
Sent: Wednesday, November 11, 2020 9:06 PM
To: 44net(a)mailman.ampr.org
Cc: Daniel E Andersen <dea(a)caida.org>
Subject: Re: [44net] Lost Packets
On 11/11/20 8:00 AM, Paul Sladen via 44Net wrote:
CAIDA/UCSD is beholden to random upstream
filtering as much in 2001[1]
and 2009[2] as it is now. And in-turn, AmprGW is/was beholden (2019)
to an ethernet switch with customised firmware[3]... a blackbox.
I can answer this part, at least. The make and model is a juniper ex3300-48t. It is not
running any customized firmware. Rather, the link drops down into a small vlan grouping
with the link from UCSD, a link to the ampr gw box, and a port replicator. For whatever
reason, when the ampr gw box reboots, there is a chance it takes the switch with it.
usually, the switch just reboots, but sometimes it full on crashes and needs a power
cycle.
It has been pretty stable recently, however.
Last flapped : 2019-10-18 01:34:48 PDT (55w5d 08:34 ago)
( on all three ports )
In other news, I'm still waiting to hear back from UCSD. Keep in mind it is a
holiday here, so it may be tomorrow.
Dan
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