Re: [WISPA] CDN Overload

2016-09-21 Thread Mike Hammett 
I have the ear of engineers at Level 3's CDN and Akamai. Working on Microsoft 
now (just sent the e-mail a couple minutes ago). Please continue filling out 
the form if you haven't. More information is better than less. 




- 
Mike Hammett 

Intelligent Computing Solutions 


Midwest Internet Exchange 


The Brothers WISP 

- Original Message -

From: "Mike Hammett" <wispawirel...@ics-il.net> 
To: "WISPA General List" <wireless@wispa.org> 
Sent: Monday, September 19, 2016 9:44:42 PM 
Subject: [WISPA] CDN Overload 


Have you seen a CDN overloading a customer? Help me gather information on the 
issue. 

What CDN? 
What have you identified the traffic to be? 
What is the access network? 
Where is the rate limiting done? 
How is the rate limiting done (policing vs. queueing, SFQ, PFIFO, etc,, etc.)? 
What is doing the rate limiting? 
What is the rate-limit set to? 
Upstream of the rate-limiter, what are you seeing for inbound traffic? 
One connection or many? 
How much traffic? 
How does other traffic behave when exceeding the rate limit? 
Where is NAT performed? 
What is doing NAT? 
Shared NAT or isolated to that customer? 
Have you done a packet capture before and after the rate limiter? The NAT 
device? 
Would you be willing to send a filtered packet capture (only the frames that 
relate to this CDN) to the CDN if they want it? 



There have been reports of CDNs sending more traffic than the customer can 
handle and ignores TCP convention to slow down. Trying to investigate this 
thoroughly so we can get the CDN to fix their system. Multiple CDNs have been 
shown to do this. 




- 
Mike Hammett 

Intelligent Computing Solutions 


Midwest Internet Exchange 


The Brothers WISP 


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Re: [WISPA] CDN Overload

2016-09-21 Thread Mike Hammett 
https://docs.google.com/spreadsheets/d/1Jdm0dOBf81kSnXEvVfI6ZJbWFNt5AbYUV8CDxGwLSm8/edit?usp=sharing
 

I have made the anonymized answers public. This will obviously have some bias 
to it given that I mostly know fixed wireless operators, but I'm hoping this 
gets some good distribution to catch more platforms. 




- 
Mike Hammett 

Intelligent Computing Solutions 


Midwest Internet Exchange 


The Brothers WISP 

- Original Message -

From: "Mike Hammett" <wispawirel...@ics-il.net> 
To: "WISPA General List" <wireless@wispa.org> 
Sent: Wednesday, September 21, 2016 9:15:48 AM 
Subject: Re: [WISPA] CDN Overload 


https://goo.gl/forms/LvgFRsMdNdI8E9HF3 

I have made this into a Google Form to make it easier to track compared to 
randomly formatted responses on multiple mailing lists, Facebook Groups, etc. 




- 
Mike Hammett 

Intelligent Computing Solutions 


Midwest Internet Exchange 


The Brothers WISP 

- Original Message -

From: "Mike Hammett" <wispawirel...@ics-il.net> 
To: "WISPA General List" <wireless@wispa.org> 
Sent: Monday, September 19, 2016 9:44:42 PM 
Subject: CDN Overload 


Have you seen a CDN overloading a customer? Help me gather information on the 
issue. 

What CDN? 
What have you identified the traffic to be? 
What is the access network? 
Where is the rate limiting done? 
How is the rate limiting done (policing vs. queueing, SFQ, PFIFO, etc,, etc.)? 
What is doing the rate limiting? 
What is the rate-limit set to? 
Upstream of the rate-limiter, what are you seeing for inbound traffic? 
One connection or many? 
How much traffic? 
How does other traffic behave when exceeding the rate limit? 
Where is NAT performed? 
What is doing NAT? 
Shared NAT or isolated to that customer? 
Have you done a packet capture before and after the rate limiter? The NAT 
device? 
Would you be willing to send a filtered packet capture (only the frames that 
relate to this CDN) to the CDN if they want it? 



There have been reports of CDNs sending more traffic than the customer can 
handle and ignores TCP convention to slow down. Trying to investigate this 
thoroughly so we can get the CDN to fix their system. Multiple CDNs have been 
shown to do this. 




- 
Mike Hammett 

Intelligent Computing Solutions 


Midwest Internet Exchange 


The Brothers WISP 



___ 
Wireless mailing list 
Wireless@wispa.org 
http://lists.wispa.org/mailman/listinfo/wireless 

___
Wireless mailing list
Wireless@wispa.org
http://lists.wispa.org/mailman/listinfo/wireless

Re: [WISPA] CDN Overload

2016-09-21 Thread Mike Hammett 
https://goo.gl/forms/LvgFRsMdNdI8E9HF3 

I have made this into a Google Form to make it easier to track compared to 
randomly formatted responses on multiple mailing lists, Facebook Groups, etc. 




- 
Mike Hammett 

Intelligent Computing Solutions 


Midwest Internet Exchange 


The Brothers WISP 

- Original Message -

From: "Mike Hammett"  
To: "WISPA General List"  
Sent: Monday, September 19, 2016 9:44:42 PM 
Subject: CDN Overload 


Have you seen a CDN overloading a customer? Help me gather information on the 
issue. 

What CDN? 
What have you identified the traffic to be? 
What is the access network? 
Where is the rate limiting done? 
How is the rate limiting done (policing vs. queueing, SFQ, PFIFO, etc,, etc.)? 
What is doing the rate limiting? 
What is the rate-limit set to? 
Upstream of the rate-limiter, what are you seeing for inbound traffic? 
One connection or many? 
How much traffic? 
How does other traffic behave when exceeding the rate limit? 
Where is NAT performed? 
What is doing NAT? 
Shared NAT or isolated to that customer? 
Have you done a packet capture before and after the rate limiter? The NAT 
device? 
Would you be willing to send a filtered packet capture (only the frames that 
relate to this CDN) to the CDN if they want it? 



There have been reports of CDNs sending more traffic than the customer can 
handle and ignores TCP convention to slow down. Trying to investigate this 
thoroughly so we can get the CDN to fix their system. Multiple CDNs have been 
shown to do this. 




- 
Mike Hammett 

Intelligent Computing Solutions 


Midwest Internet Exchange 


The Brothers WISP 


___
Wireless mailing list
Wireless@wispa.org
http://lists.wispa.org/mailman/listinfo/wireless

[WISPA] CDN Overload

2016-09-19 Thread Mike Hammett 
Have you seen a CDN overloading a customer? Help me gather information on the 
issue. 

What CDN? 
What have you identified the traffic to be? 
What is the access network? 
Where is the rate limiting done? 
How is the rate limiting done (policing vs. queueing, SFQ, PFIFO, etc,, etc.)? 
What is doing the rate limiting? 
What is the rate-limit set to? 
Upstream of the rate-limiter, what are you seeing for inbound traffic? 
One connection or many? 
How much traffic? 
How does other traffic behave when exceeding the rate limit? 
Where is NAT performed? 
What is doing NAT? 
Shared NAT or isolated to that customer? 
Have you done a packet capture before and after the rate limiter? The NAT 
device? 
Would you be willing to send a filtered packet capture (only the frames that 
relate to this CDN) to the CDN if they want it? 



There have been reports of CDNs sending more traffic than the customer can 
handle and ignores TCP convention to slow down. Trying to investigate this 
thoroughly so we can get the CDN to fix their system. Multiple CDNs have been 
shown to do this. 




- 
Mike Hammett 

Intelligent Computing Solutions 


Midwest Internet Exchange 


The Brothers WISP 

___
Wireless mailing list
Wireless@wispa.org
http://lists.wispa.org/mailman/listinfo/wireless