TeliaSonera routing issue / microsoft.com

Thu Sep 6 13:27:08 UTC 2007

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		   	
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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.
> 
> 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
> 
>  1  s-b4-link.telia.net (213.248.97.93)  0.620 ms  0.498 ms  0.409 ms
>  2  s-bb2-link.telia.net (213.248.66.13)  0.762 ms  0.597 ms  0.721 ms
>  3  kbn-bb2-pos0-0-0.telia.net (213.248.65.29)  10.231 ms  10.276 ms  
> 10.215 ms
>  4  nyk-bb2-link.telia.net (213.248.82.101)  94.660 ms  94.670 ms  
> 94.640 ms
>  5  sjo-bb1-link.telia.net (80.91.254.177)  161.549 ms  161.542 ms  
> 161.530  ms
> 
> .. stops here.
> 
> If it works (from upstream) it continues as follows:
> 
>  6  microsoft-110312-sjo-bb (213.248.86.70)  161.421 ms  161.818 ms  
> 157.519 ms
>  7  ge-6-3-0-44.sjc-64cb-1a.ntwk.msn.net (207.46.44.98)  161.814 ms  
> 155.456 ms  157.559 ms
>  8  ge-1-0-0-0.bay-64c-1a.ntwk.msn.net (207.46.37.158)  156.229 ms  
> 158.292 ms  156.223 ms
> 

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