TeliaSonera routing issue / microsoft.com

Pekka Savola pekkas at netcore.fi
Thu Sep 6 11:52:12 UTC 2007


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

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings



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