Eircom connectivity issue

Tue Oct 14 17:34:26 UTC 2008

Hello.

I've ran into a puzzling scenario and I thought I'd ask around to see if 
anyone else has an idea.

I have a customer who operates a server on our network who informed me 
that a customer of his out of Ireland is having connectivity issues to 
it.  The ISP in question is Eircom, and the block that seems unreachable 
is 86.40.0.0/13.

Any trace to an IP in that block drops off the Earth at the edge of the 
Tier 1 provider that we connect with, such as AT&T and Sprint.  I've 
also tried Level3, but the traffic goes over to AT&T in the end anyhow.  
I've checked Level3 and Sprint's looking glass and performs a traceroute 
from there, and I get the same result, so it doesn't appear to be an 
issue with our network.

I'm at a loss and my customer told me that his customer has already 
contacted Eircom and they are at a loss to explain the disconnect as 
well.  Does anyone have some insight into this?

--
Philip L.