nanog mailing list archives
Re: Acceptable DSL Speeds (ms based)
From: Joe Maimon <jmaimon () ttec com>
Date: Wed, 04 May 2005 13:44:59 -0400
Joel Jaeggli wrote:
Since it is probably a fair assumption that routers will never procces forwarding packets slower than ICMP replies, the following applies.On Wed, 4 May 2005, Luke Parrish wrote:Andrew, traceroute is an effective tool is measuring roundtrip in ms format.packets sent to a router are typically processed differently and with different priority then packets forwarded through it. This makes traceroute fairly unreliable.
The router receiving the traceroute response from its upstream would process that in its forwarding path. So if you see a 30ms hit on hop A and a 60 ms hit on hop B you can pretty much determine that hop A is 30ms away but you cant be quite sure about hop B until you see hop C's replies.
To make this more interesting, its always possible that hop B or C's path to you is different than your path to hop B or C.
Also, traceroute is effective at showing that the path rtt is good. Its just when you are trying to find where the latency is that things can get dicey.
Current thread:
- Re: Acceptable DSL Speeds (ms based), (continued)
- Re: Acceptable DSL Speeds (ms based) Luke Parrish (May 04)
- Re: Acceptable DSL Speeds (ms based) Hank Nussbacher (May 04)
- Re: Acceptable DSL Speeds (ms based) Luke Parrish (May 04)
- Re: Acceptable DSL Speeds (ms based) Andrew Lee (May 04)
- Re: Acceptable DSL Speeds (ms based) Luke Parrish (May 04)
- Re: Acceptable DSL Speeds (ms based) Florian Weimer (May 04)
- Re: Acceptable DSL Speeds (ms based) Luke Parrish (May 04)
- Re: Acceptable DSL Speeds (ms based) Valdis . Kletnieks (May 04)
- Re: Acceptable DSL Speeds (ms based) Petri Helenius (May 05)
- Re: Acceptable DSL Speeds (ms based) Andrew Lee (May 04)
- Re: Acceptable DSL Speeds (ms based) Joel Jaeggli (May 04)
- Re: Acceptable DSL Speeds (ms based) Joe Maimon (May 04)
- Re: Acceptable DSL Speeds (ms based) Barney Wolff (May 04)
- Message not available
- Re: Acceptable DSL Speeds (ms based) Barney Wolff (May 04)
- Re: Acceptable DSL Speeds (ms based) Andy Johnson (May 04)
- Re: Acceptable DSL Speeds (ms based) Luke Parrish (May 04)