nanog mailing list archives
Re: Internet diameter?
From: Christopher Morrow <morrowc.lists () gmail com>
Date: Fri, 23 Nov 2018 14:01:00 -0500
On Thu, Nov 22, 2018 at 12:30 AM William Herrin <bill () herrin us> wrote:
On Wed, Nov 21, 2018 at 7:58 PM Christopher Morrow <morrowc.lists () gmail com> wrote:now, why does it matter?Good question! It matters because a little over two decades ago we had some angst as equipment configured to emit a TTL of 32 stopped being able to reach everybody. Today we have a lot of equipment configured to emit a TTL of 64. It's the default in Linux, for example. Are we getting close to the limit where that will cause problems? How close?
ah-ha! :) good, much easier to see the point with the goal in mind :) So... you COULD spin up some set of traceroute measurements from ripe-atlas, right? pick 5 probes per city and traceroute to common targets? I think there are a few things to consider: 1) not ever network exposes their hops all the time (mpls where the paths no-decrement-ttl, for instance). 2) the common user traffic pattern is likely not to fall into the 'too many hops' problem because of cdn and/or other trickery to shorten the path between end-user && content (to increase effective bw to the customer AND lower latency,etc) 3) I would think it rare for consumers (the largest pool of internet users by role) to need to send packets to the far side of the internet Or put another way: "How would you pick what's important to measure to?"
Current thread:
- Re: Internet diameter?, (continued)
- Re: Internet diameter? Stephen Satchell (Nov 21)
- Re: Internet diameter? Aaron1 (Nov 21)
- Re: Internet diameter? Christopher Morrow (Nov 21)
- Re: Internet diameter? Bryce Wilson (Nov 21)
- Re: Internet diameter? Ben Cannon (Nov 21)
- Re: Internet diameter? Ross Tajvar (Nov 21)
- Re: Internet diameter? William Herrin (Nov 21)
- Re: Internet diameter? Oliver O'Boyle (Nov 21)
- Re: Internet diameter? tim () pelican org (Nov 22)
- Re: Internet diameter? Lars Prehn (Nov 26)
- Re: Internet diameter? Christopher Morrow (Nov 23)
- RE: Internet diameter? Keith Medcalf (Nov 22)
- Re: Internet diameter? Mike Hammett (Nov 22)
- RE: Internet diameter? Keith Medcalf (Nov 22)
- RE: Internet diameter? Hal Murray (Nov 24)
- Re: Internet diameter? Christopher Morrow (Nov 25)
- Re: Internet diameter? Casey Russell (Nov 26)
- Re: Internet diameter? Ignacio de castro (Nov 26)
- Re: Internet diameter? Andy Ringsmuth (Nov 21)