[c-nsp] round-trip differences towards google

[Rens]

When it goes from my IP transit provider to google it increases.

 

  _____  

From: Irena Nikolova [mailto:irenna at gmail.com] 
Sent: mercredi 8 juillet 2009 15:04
To: Rens
Cc: E. Versaevel; David Freedman; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] round-trip differences towards google

 

Which would explain the differences between the round-trip times. You can
see the latency value on every hop when you do traceroute, where does it
increase?

On Wed, Jul 8, 2009 at 2:38 PM, Rens <rens at autempspourmoi.be> wrote:

They both leave my network via the same IP transit but then afterwards some
hops are different...


-----Original Message-----
From: E. Versaevel [mailto:erik at infopact.nl]
Sent: mercredi 8 juillet 2009 12:45
To: Rens
Cc: 'David Freedman'; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] round-trip differences towards google

Is there a difference when you traceroute with different source ip's ?

Rens schreef:
> I expect the return routing to be the same as for all my IP addresses
since
> they are all advertised in the same way.
>
> I guess google doesn't handle them the same way?
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of David Freedman
> Sent: mercredi 8 juillet 2009 12:21
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] round-trip differences towards google
>
> Rens wrote:
>> Hi all,
>>
>>
>>
>> I'm having some difficulties understand some round-trip difference on the
>> same router just by changing the source interface:
>>
>>
> your source address will of course become the destination address which
> google's equipment will want to send the ICMP replies back to, google's
> return routing will dictate the path latency.
>
> Dave.
>
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Erik Versaevel