[outages] Comcast IP routing issues, Western Chicago Suburbs (fed from West Chicago)

[Nate Burke]

Has anyone seen issues in the western Chicago suburbs on Comcast today?  
At ~1:50am it looks like there was a brief outage, then a route change 
within the comcast network between 350 cermak and West Chicago 
(according to PTR data), and all day I've been fielding calls from our 
VoIP Customers who have comcast business/Home circuits that all seem to 
go through West Chicago. Some Comcast IP's I can ping from my HE/Zayo 
circuits, others I cannot, yet some TCP Applications appear to still 
work to those IP's.  Since the route change this morning, UDP Traffic 
has been randomly getting through.  ICMP Between Comcast IP's within 
west Chicago appears normal.  The Customers I've talked to also report 
sporadic outages/slowness to cloud services.  Attempted to contact 
Cocmast through the normal support channels, but since things are 
'mostly' working, haven't gotten anywhere with Tier1 support yet.

Happy to provide trace routes as needed, but since it's happening across 
multiple circuits/IP Blocks didn't want to include random data if it's a 
known larger issue.  We did have High winds last night, so it feels like 
a fiber is down somewhere, and routing is wonky now.

Nate Burke

Blast Communications