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Marcel FloresSree Priyanka UppuVerizon Digital Media Services

A CDN as a Telescope

2

Verizon Digital Media Services’ Edgecast CDN

● Understand the trends in ISP behaviors

● Large scale routing behavior

● Internet Performance Analysis

3

CDN as a Telescope

4

Dataset

Client Ip

Country of origin

ASN PoP # Requests

x.x.x.0/24

Brazil 1234 ABC 98765

x.x.x.0/24

Mexico 5678 DEF 43210

x.x.x.0/24

Colombia 1234 GHI 98765

x.x.x.0/24

Chile 5678 ABC 43210

5

Request counts by country of origin

6

Request counts by country of origin

7

AS popularity by country

8

AS popularity by country

9

AS popularity by country

10

AS popularity by country

11

Client Requests

12

Client Requests

13

RTT Penalty of inter-country traffic

Country

14

RTT Penalty of inter-country traffic

Country

● Large scale CDN as a passive observatory.○ Visibility into region specific behavior.○ Routing behavior.○ Penalty incurred in inter-country traffic.

● Provides infrastructure planning insight for the CDN and the larger operator community.

15

Conclusion

Thank you.