nanog mailing list archives
Re: Help me make sense of these traceroutes please
From: Jeroen Massar <jeroen () massar ch>
Date: Wed, 25 Dec 2013 00:55:46 +0100
On 2013-12-25 00:16, Sam Moats wrote:
Hello Nanog community, I would like to enlist your help with understanding this latency I'm seeing.
You are likely seeing the effects of asymmetric routing. [..]
Tracing route to xxx.yyy.ie [193.1.x.x]
www.heanet.ie by chance? :) Though you could use for instance: http://planchet.heanet.ie/toolkit/gui/reverse_traceroute.cgi to do a reverse traceroute, do make sure you force your connectivity to IPv4 as that host will do IPv6 too. (locally nullrouting the destination /128 is the trick I use for 'disabling' IPv6 temporarily). Otherwise the HEANET folks are extremely helpful and clued in, you can always ask them for help with issues. It is the end-of-year though and those Irish folks have lots of really good whiskey, Guinness thus you might have to be patient till the new year. Alternatively, you could use a tool like 'tracepath' or 'mtr' as those reports multiple answers to a response and also check for the TTL on the return packets. Greets, Jeroen
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)