Re: email disappearing


"Ian Bartholomew" <news@xxxxxxxxxxx> wrote in message
news:40ge4aF1aeg5eU1@xxxxxxxxxxxxxxxxx
> Spack wrote:
>
>> I've tried tracing to iandb.me.uk from here - same problem, the router
>> 195.188.230.50 doesn't know what to do with the packet. I'm on Easynet,
>> so it's not a Vispa specific issue.
>
> Thanks. I've only been able to try it from three other places and they
> all worked. I'd assumed it wasn't Vispa specific - but you never know.
>
> I'm not really up with how the net works at this level - could it be a
> routing problem further back in the trace. I was thinking of an error
> routing the packets into the NTL/Telewest network when it should have gone
> somewhere else?. The "Video on demand infrastructure" name just looked a
> bit suspect to me.

Well, the packets are being forwarded by some NTL/TW routers, so that
suggest they should be able to route them to their destination, otherwise
they'd fail at the first NTL/TW router. I'd expect to see some sort of loop,
packets being bounced between 2 routers, if the NTL/TW network was trying to
route them back the way they came in (which is probably what would happen if
NTL/TW weren't supposed to be in the route in the first place). Also, with
the route from Easynet going the same way, it looks like they should be
going there, at least with the peering arrangements Vispa and Easynet have
in place. I suppose it's possible that NTL/TW previously had a peering
arrangement to pass the packets on and have now disconnected it (and not
bothered to update their own routing tables to remove the route through
their network), and the Vispa and Easynet routers haven't been updated with
new routing information. Can you get a trace from an ISP that it does work
on?

As to the VOD name, it's just a name that NTL/TW gave when they were
assigned the block. That may well have been the intention for the entire
block back then, but they may have decided to reuse a section of it for
other parts of their network.

Dan


.

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