nanog mailing list archives
Re: Help me make sense of these traceroutes please
From: Jimmy Hess <mysidia () gmail com>
Date: Wed, 25 Dec 2013 09:28:28 -0600
On Wed, Dec 25, 2013 at 8:03 AM, Martin Hotze <m.hotze () hotze com> wrote:
On 2013-12-25 00:16, Sam Moats wrote:
...
You are likely seeing the effects of asymmetric routing.. .. or the effect of passing traffic through NSA infrastructure.
Ah... NSA. That's probably it. So much for my theory of a Router virtual chassis straddling the atlantic. or the extra kinetic energy carried by the overseas-bound packet took longer for the router to absorb and rebound with an ICMP. But in all seriousness --- what is probably happening here, is the result of extra "hops" that don't show up in traceroute. MPLS tunnels could well fit the bill. Other things to consider when latency seems sensitive to destination IP --- are preceding device in the traceroute might also have multiple links to the same device; with one link congested and some form of IP-based load sharing, that happens to be the toward-overseas link.
SCNR, #m
-- -JH
Current thread:
- Help me make sense of these traceroutes please Sam Moats (Dec 24)
- Re: Help me make sense of these traceroutes please Jeroen Massar (Dec 24)
- Re: Help me make sense of these traceroutes please Sam Moats (Dec 24)
- Re: Help me make sense of these traceroutes please Pedro Cavaca (Dec 24)
- Re: Help me make sense of these traceroutes please Valdis . Kletnieks (Dec 25)
- Re: Help me make sense of these traceroutes please Bacon Zombie (Dec 25)
- Re: Help me make sense of these traceroutes please Warren Bailey (Dec 25)
- Re: Help me make sense of these traceroutes please Sam Moats (Dec 24)
- Re: Help me make sense of these traceroutes please Jeroen Massar (Dec 24)
- <Possible follow-ups>
- Re: Help me make sense of these traceroutes please Martin Hotze (Dec 25)
- Re: Help me make sense of these traceroutes please Jimmy Hess (Dec 25)
- RE: Help me make sense of these traceroutes please Josephson, Marcus (Dec 26)
- RE: Help me make sense of these traceroutes please Sam Moats (Dec 27)
- Re: Help me make sense of these traceroutes please Jimmy Hess (Dec 25)