RE: Question re. operator tools - somewhere betwixt fast failover and TE

[Chris Wright <chris.wright () commnetbroadband com>]

I’m not entirely certain these are problems that operators necessarily concern themselves with. Datacenters and 
specialized service networks, perhaps, but not internet service providers. Mainly because the internet is a relatively 
lossy beast with several performance inhibitors that constantly lie outside an operator’s control (i.e. bad filters 
seem to break the entire United States eastern seaboard at least once a year.) I’d wager most of us are not concerned 
with the kind of failure scenario you’re describing simply because there is no demand from our customers for 
sub-millisecond remediation. At least not from the ones who are willing to pay for it. 😉

---

Chris

From: NANOG <nanog-bounces+chris.wright=commnetbroadband.com () nanog org> On Behalf Of Matthew Nance Hall
Sent: Friday, August 5, 2022 12:24 PM
To: nanog () nanog org
Cc: 'Ramakrishnan Durairajan' <ram () cs uoregon edu>; 'PAUL R BARFORD' <pb () cs wisc edu>; klaus-tycho.foerster () 
tu-dortmund de
Subject: Question re. operator tools - somewhere betwixt fast failover and TE

You don't often get email from mhall () cs uoregon edu<mailto:mhall () cs uoregon edu>. Learn why this is 
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Hello,

I'm Matthew Nance-Hall (Matt), a PhD Candidate at the University of Oregon working with Prof. Ram Durairajan (UO), 
Prof. Paul Barford (UW-Madison) and Prof. Klaus-Tycho Foerster (TU Dortmund).

I was hoping someone could shed operator perspective on a research question we're exploring. We're interested in the 
timescales and mechanisms used to adjust data paths and wondering where gaps might exist between traffic engineering 
(TE), fast fail-over, and routing.

We're specifically curious about spatio-temporal characteristics where gaps might exist. For example, the topological 
scope of an event (congestion or outage) and the timescale for adjustments to be made. I'm aware there are operator 
tools such as fast fail-over and TE for making changes confined to single links or across the whole network but wonder 
if there is a place for events that have broader scope (beyond a single link but less than the whole network) where new 
inquiry and exploration would be welcome.

Thank you,
Matt