gmane.org.operators.nanog

Pekka Savola | 6 Sep 13:48

TeliaSonera routing issue / microsoft.com


Hi -

TeliaSonera has reported routing problem due to prefix filtering leaks 
/ max-prefix triggering, starting around 0616 UTC.  I guess some 
others are seeing this as well.  I wonder what was the more exact 
reason, and why the problem still persists after about 6 hours.

In particular, our customers have noticed this with various sites 
related to Microsoft, including e.g., VoIP systems failing because 
contacting some active-x site failed.

Is there a looking glass, traceroute server, or sensible contact info 
for someone at AS 8075 to check what the routing looks like from that 
perspective?

(Traceroute works from our upstream, but not from here, which suggests 
a potential return path issue for e.g., 193.166.0.0/15, pingable 
address 193.166.255.241).

;; ANSWER SECTION:
www.microsoft.com.      1088    IN      CNAME 
toggle.www.ms.akadns.net.
toggle.www.ms.akadns.net. 57    IN      CNAME   g.www.ms.akadns.net.
g.www.ms.akadns.net.    57      IN      CNAME   lb1.www.ms.akadns.net.
lb1.www.ms.akadns.net.  57      IN      A       207.46.192.254
lb1.www.ms.akadns.net.  57      IN      A       207.46.193.254
lb1.www.ms.akadns.net.  57      IN      A       207.46.19.190
lb1.www.ms.akadns.net.  57      IN      A       207.46.19.254

(Continue reading)

headers

Matthew Sullivan | 6 Sep 14:15

Re: TeliaSonera routing issue / microsoft.com


Pekka Savola wrote:
>
> Hi -
>
> TeliaSonera has reported routing problem due to prefix filtering leaks 
> / max-prefix triggering, starting around 0616 UTC.  I guess some 
> others are seeing this as well.  I wonder what was the more exact 
> reason, and why the problem still persists after about 6 hours.
>
This also times with when I lost connectivity to my hosts in the UK ... 
path is via Above+Telia.

Third hand/Chinese whipsers information:

The UK network(s) are now selectively dropping routes to the affected 
paths.  Telia have been notified.

Regards,

Mat

headers

Tom Sands | 6 Sep 15:27

Re: TeliaSonera routing issue / microsoft.com

This was the update we'd received.

At the moment we are seeing bit errors on a link between London and New 
York in a provider’s network, which is significantly affecting traffic 
on our IP backbone. This issue is escalated to our level 3 manager who 
is currently in contact with the provider, and we are actively working 
to reach a resolution. Unfortunately we can not provide an ETR for the 
issue at this time.

At the same time we are experiencing a fault in London after a planned 
upgrade. Our IP engineers are currently troubleshooting this issue and 
we are waiting for further information.

------------------------------------------------------
Tom Sands			  				
Chief Network Engineer				
Rackspace Managed Hosting	    	
(210)447-4391		   	
------------------------------------------------------

Pekka Savola wrote:
> 
> Hi -
> 
> TeliaSonera has reported routing problem due to prefix filtering leaks / 
> max-prefix triggering, starting around 0616 UTC.  I guess some others 
> are seeing this as well.  I wonder what was the more exact reason, and 
> why the problem still persists after about 6 hours.
>

(Continue reading)