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Re: [rare-dev] RES: perfSONAR on RARE/FreeRtr


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  • From: mc36 <>
  • To: Tim Chown <>
  • Cc: Marcos Felipe Schwarz <>, Frédéric LOUI <>, Ivana Golub <>, Xavier Jeannin <>, "" <>, Mohácsi János <>, Visky Balázs <>
  • Subject: Re: [rare-dev] RES: perfSONAR on RARE/FreeRtr
  • Date: Fri, 26 Aug 2022 12:12:26 +0200
or maybe a bmp demo?

if they shut the backup geant link then it'll become false, and the change
will be 2...
when they noshut it, then the state will be true again, but the change will
be 3...
so if you didn't listened to janos at that time, we disabled snmp for years
now...


bmp.wdcvhpc#show bmp bmp
from peer as state change last
195.111.97.83 152.66.0.124 2547 true 1
5d14h
195.111.97.83 195.111.103.206 12301 true 1
5d14h
195.111.97.108 62.40.96.23 20965 true 1
5d14h
195.111.97.108 62.40.96.24 20965 true 1
5d14h
195.111.97.108 62.40.102.26 20965 true 1
5d14h
195.111.97.108 62.40.124.101 20965 true 1
5d14h
195.111.97.108 80.239.195.56 1299 true 1
5d14h
195.111.97.108 81.183.2.166 5483 true 1
5d14h
195.111.97.108 83.97.88.81 21320 true 1
5d14h
195.111.97.108 94.21.255.13 20845 true 1
5d14h
195.111.97.108 193.188.137.1 5507 true 1
5d14h
195.111.97.108 193.188.137.2 5507 true 1
5d14h
195.111.97.108 193.188.137.53 5400 true 1
5d14h
195.111.97.108 193.188.137.74 8708 true 1
5d14h
195.111.97.108 193.188.137.125 3303 true 1
5d14h
195.111.97.108 193.188.137.142 199524 true 1
5d14h
195.111.97.108 193.188.137.175 6939 true 1
5d14h
195.111.97.108 193.224.231.138 65012 true 1
5d14h
195.111.97.108 195.191.97.254 59649 true 1
5d14h
195.111.97.108 213.222.185.3 21334 true 1
5d14h
195.111.97.108 2001:738:1040:193:224:231:136:138 65012 true 1
5d14h
195.111.97.108 2001:798:1::65 21320 true 1
5d14h
195.111.97.108 2001:798:1b:10aa::5 20965 true 1
5d14h
195.111.97.108 2001:7f8:35::3303:1 3303 true 1
5d14h
195.111.97.108 2001:7f8:35::5507:1 5507 true 1
5d14h
195.111.97.108 2001:7f8:35::5507:2 5507 true 1
5d14h
195.111.97.108 2001:7f8:35::6939:1 6939 true 1
5d14h
195.111.97.108 2001:2000:3080:14f5::1 1299 true 1
5d14h
195.111.97.108 2a01:368:1fe::11 20845 true 1
5d14h
195.111.97.109 62.40.124.17 20965 true 1
5d14h
195.111.97.109 83.97.88.85 21320 true 1
5d14h
195.111.97.109 149.11.10.9 174 true 1
5d14h
195.111.97.109 193.188.137.1 5507 true 1
5d14h
195.111.97.109 193.188.137.2 5507 true 1
5d14h
195.111.97.109 193.188.137.125 3303 true 1
5d14h
195.111.97.109 193.188.137.142 199524 true 1
5d14h
195.111.97.109 193.224.231.142 65012 true 1
5d14h
195.111.97.109 195.191.97.254 59649 true 1
5d14h
195.111.97.109 213.163.3.173 12301 true 1
5d14h
195.111.97.109 2001:738:1040:193:224:231:140:142 65012 true 1
5d14h
195.111.97.109 2001:798:1::69 21320 true 1
5d14h
195.111.97.109 2001:798:10:10aa::15 20965 true 1
5d14h
195.111.97.109 2001:7f8:35::3303:1 3303 true 1
5d14h
195.111.97.109 2001:7f8:35::5507:1 5507 true 1
5d14h
195.111.97.109 2001:7f8:35::5507:2 5507 true 1
5d14h
195.111.97.109 2001:978:2:27::7:1 174 true 1
5d14h
195.111.97.112 81.183.245.9 5483 true 1
5d14h

bmp.wdcvhpc#




On 8/26/22 12:05, mc36 wrote:
im not against the perfsonar at all, the more measures the better...

but to spot the routing and/or prefix changes, we have log-spf in isis, ospf
and lsrp

if you still use icinga, prometheus any basically anything, all these could
be barked back that is:
the monitoring asks regularly the single management box part of the igp,
as as soon as the routing change happens, the show will differ so it'll tell
you what happened

frederic, could you please show tim the icinga demo from the p4lab after to
let the others catch the idea?
(no worries, i'll be with you to back you up if the vc will be after my lunch)

imho that was the stf15 presentation about:
http://www.freertr.org/present/geant-bmp.pdf
we did it with niall's help, he _flapped_ 2 times the hbone backup link and
we got an alert which needed to be cleared...


janos, balazs, if frederic fails to find a proper timeslot, could you please
help a bit here by demoing what happens when you shut szeged-debrecen for a
minute or so?

thanks,
cs





On 8/26/22 11:54, Tim Chown wrote:
On 26 Aug 2022, at 10:48, mc36 <> wrote:

On 8/26/22 11:41, Tim Chown wrote:
On 25 Aug 2022, at 14:56, mc36 <> wrote:

hi,

On 8/25/22 15:41, Marcos Felipe Schwarz wrote:
1. supports all perfsonar test, including bandwith at 100G and above. With 2., we'll be limited by the CPU resources of the switch and cpu-todataplane performance, which normally are very limited.
so true, moreover, if you do 100g measurements in every 10ms then the user
traffic will be heavily suppressed...
imho doing a twamp measurements in every 10ms should give good enough results
perfSONAR usually runs three types of test - throughput, latency (including loss), and path. Latency is run continuously (but is very lightweight), but throughput is only by default run once every 6 hours, for 30 seconds, so it will not generally affect user traffic, and with TCP tests, it will be fair in competing for bandwidth.
which is partially true as we all know about the bandwidth*delay product

consider that you'll perform it over a very long distances

Yes, some tests will be intercontinental, but the R&E backbones are generally not congested, so any loss, and thus drop in performance (unless maybe using BBR) is likely caused by issues in the end sites. There s a few hundred CERN experiment sites running perfSONAR with these sorts of tests, usually between countries or continents.

Tim

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