On Thu, 17 Oct 2002, k claffy wrote:
> remark it is also possible for the (forward or reverse)
> path to change in the middle of the measurement,
> such that traceroute output would lead you
> to believe a path that never existed anywhere
> on the Internet (i.e., one that is not manifested
> in th
On Thu, Oct 17, 2002 at 10:31:12AM -0400, Darrell Carley <[EMAIL PROTECTED]>
wrote:
> I am trying to troubleshoot a latency issue for some of our networks,
> and was wondering about this.Knowing that routing isn't always
> symmetrical, is it possible for a traceroute to traverse a different
> re
> > > > > According to definition, is should take the same path, but are there any
> > > > > other cases that I should be aware of?
> > > >
> > > > According to the definition, it is going to show you the path the packets
> > > > took from you to the destination, not from the destination back.
>
On Thu, Oct 17, 2002 at 08:43:01AM -0700, k claffy wrote:
>
> remark it is also possible for the (forward or reverse)
> path to change in the middle of the measurement,
> such that traceroute output would lead you
> to believe a path that never existed anywhere
> on the Internet (i.e., one that i
at Thursday, October 17, 2002 3:58 PM, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> was seen to say:
>> Unless you did "- g",
> Not correct. -g specifies loose source routing on the way *there*,
> not back.
No, you can get both if you ping *yourself* with the actual destination
as -g. this gives you both
On Thu, Oct 17, 2002 at 07:45:39AM -0700, Stephen Stuart wrote:
Traceroute sends UDP datagrams and receives ICMP datagrams in order to
show you what it shows you. It is possible for the ICMP datagrams to
return via a different path than the UDP datagrams took outbound (it
is also possi
> a traceroute shows the outbound route. it's possible for the the probe
> packets to follow one path and the returning icmp packets to take another
> path. a looking glass in the AS your tracing to is a good way to see what
> the return path is...
The returning ICMP packets may take many differe
There used to be an old flag you could set on an
ICMP_ECHO request to record the path the echo reply takes back (ping -R or -r?),
but apparently its not used much anymore. Probably just as well.. it could only
hold ~8 hops..
Andy
- Original Message -
From:
Darrell Carley
$author = "Darrell Carley" ;
>
> I am trying to troubleshoot a latency issue for some of our networks,
> and was wondering about this.Knowing that routing isn't always
> symmetrical, is it possible for a traceroute to traverse a different
> reverse path, than the path that it took to get there?
On Thu, Oct 17, 2002 at 10:58:03AM -0400, [EMAIL PROTECTED] wrote:
>
> > [EMAIL PROTECTED] wrote:
> >
> >
> > >
> > >
> > > > According to definition, is should take the same path, but are there any
> > > > other cases that I should be aware of?
> > >
> > > According to the definition, it is
> [EMAIL PROTECTED] wrote:
>
>
> >
> >
> > > According to definition, is should take the same path, but are there any
> > > other cases that I should be aware of?
> >
> > According to the definition, it is going to show you the path the packets
> > took from you to the destination, not from t
[EMAIL PROTECTED] wrote:
>
>
> > According to definition, is should take the same path, but are there any
> > other cases that I should be aware of?
>
> According to the definition, it is going to show you the path the packets
> took from you to the destination, not from the destination back.
> I am trying to troubleshoot a latency issue for some of our networks,
> and was wondering about this.Knowing that routing isn't always
> symmetrical, is it possible for a traceroute to traverse a different
> reverse path, than the path that it took to get there?
Traceroute sends UDP datagrams
> According to definition, is should take the same path, but are there any
> other cases that I should be aware of?
According to the definition, it is going to show you the path the packets
took from you to the destination, not from the destination back.
Alex
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