Re: Outage during reroute in Nordunet on Feb 14 2022 - Network-metrics

21 Feb 2022

      Hi Otto,

I have tweaked a little on our ISIS links to/from our routers in ASIA. Hopefully it will
help in future cases. I have a little problem understanding what other problems you have
been observing and or what you would be expecting to see in case of errors in network and
time for network to converge.. could you please help me understand your microdep graphs
etc. 

Thanks..

--
Carsten Pettersson
Senior IP Network Engineer
carsten(a)nordu.net | mobile: +45 3118 7401

...
  On 15 Feb 2022, at 16.22, Otto J Wittner
&lt;otto.wittner(a)sikt.no&gt; wrote:

 Hi, Nordunet NOC!

 While browsing yesterdays (2022-02-14) events discovered by our
https://microdep.uninett.no end-to-end monitoring tool, we observe a collection of
"routechange-events" with associated connection downtimes ("Lost") in
Nordunet:

 ## trondheim-mp to adelaide-mp

https://microdep.uninett.no/tracetree.html?topo=/dragonlab/mp/trondheim-mp/…

 Day Time	Lost(s)	Queue(ms)
 14 14:01	0.1	0.2	
 14 14:22	26.9	0.3	
 14 14:25	0.1	0.2	

 ## trondheim-mp to auckland-mp

https://microdep.uninett.no/tracetree.html?topo=/dragonlab/mp/trondheim-mp/…

 Day Time	Lost(s)	Queue(ms)
 14 10:23	2.4	0.2	

 (Also observable on trondheim-mp to saopaulo-mp:
https://microdep.uninett.no/tracetree.html?topo=/dragonlab/mp/trondheim-mp/…)

 ## trondheim-mp to zurich-mp

https://microdep.uninett.no/tracetree.html?topo=/dragonlab/mp/trondheim-mp/…

 Day Time	Lost(s)	Queue(ms)
 14 17:27	0.6	0.1	

 26.9, 2.4 and 0.6 second outages... can something perhaps be further optimized?

 BR
 O2

 --
 Otto J Wittner  tel +47 99550566
 Sikt            http://sikt.no 