[ILUG] Eircon DSL - A word to the wise

[Timothy Murphy]

On Thursday 29 April 2004 14:18, Cathal Garvey wrote:

>  > Incidentally, when I tried traceroute anywhere
>  > I got the first 2 sites at once,
>  > then there was a wait of about 10 seconds before the 3rd and 4th came
>  > on, and nothing after that.
>  > But what puzzled me was that the times in the 3rd and 4th sites
>  > were reasonable - 50ms or so.
>  >
>  >
>  > Why weren't they much longer, since there was a 10s delay?
>
> If it was DNS related, it was probably because it was doing a reverse
> lookup on (and borking) on the IP. So the traceroute would still get a
> normal reply, just when it comes to display the reply it gets the
> reverse domain name for the IP, and it was probably that that took the
> 10s).

Thanks, that sounds very plausible.
I should have said that the problem only occurred when good people are asleep,
I think 2am-4am, or something like that.
It was resolved the next morning.

For a moment, I lost my total faith in Sir Anthony,
and even turned his image to the wall.

By the way, 
I've always found Eircom ADSL people very helpful and knowledgeable
(at least by comparison with me).
Some people seem to have been programmed to go into hysterical mode
when the word "Eircom" appears.



-- 
Timothy Murphy  
e-mail (<80k only): tim /at/ birdsnest.maths.tcd.ie
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland