SWSX talk - The Network Sucks
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Transcript of SWSX talk - The Network Sucks
The Network SucksSXSW 2016
AGENDAWHAT MORE CAN WE DO
UNDERSTANDING GAME TRAFFIC
WHAT DID RIOT DO
WHY THE NETWORK SUCKS
WHY ALL THE LAG?
The state of NA Nov ‘14
14ms
10ms26ms
30ms
4ms
UNDERSTANDING GAME TRAFFIC
LET’S TALK ABOUT ROUTERS
LET’S TALK ABOUT ROUTERSRouters are the workhorses of the Internet
Route Processors are extremely specialized
Routers have to process, or read, every single packet
Packet Size Matters
Standard Web Traffic
Standard Game Traffic
1500 Bytes
50ish Bytes
LET’S TALK ABOUT ROUTERSRouters are the workhorses of the Internet
Route Processors are extremely specialized
Routers have to process, or read, every single packet
Routers can be overwhelmed by our traffic
Routers Try and use Buffers to fix this – but this must be configured, and most ISPs don’t configure buffer for UDP
LET’S TALK ABOUT ROUTERSRoute Processor
Buffer
Interface
Physical Medium (Cable)
If the Interface is over subscribed, the Packet will get dropped.
If the Processor is oversubscribed the system will see if it can buffer the Packet, but most ISPs don’t buffer UDP.
Especially When We Do This…
URF MODE INCREASED TRAFIC BY 40% INSTANTLY
LET’S TALK ABOUT ROUTERSRouters are the workhorses of the Internet
Route Processors are extremely specialized
Routers have to process, or read, every single packet
Routers can be overwhelmed by our traffic
Routers Try and use Buffers to fix this – but this must be configured, and most ISPs don’t configure buffer for UDP
Routers work in a vacuum and make all decisions singularly
WHAT DOES THIS MEAN?
ISP ACCESS NETWORK
DDOS ATTACK
DROPPING PACKETS
Access Networks can add
5 – 15 ms or more
WHAT DOES THIS MEAN?
ISP ACCESS NETWORK
DDoS
WHO DO WE COMPARE TO?
WHAT DID RIOT DO
Our Goal in NA
80ms How Did We Come Up With That?
We took Lessons from Audio TestingAnd we took lessons from Visual Testing
EXPLAIN PEERING PARTNER SLIDE
THREE WORDS TO DESCRIBE PEERING
WHAT MORE CAN WE DO?
IS
ISP ACCESS NETWORK
Tunneling and Steering
BOSTON, MA
DDOS ATTACK
SDX
IS
ISP ACCESS NETWORK
IS
ISP ACCESS NETWORK
COMCAST
AT&T
ALL IN THE SAME FACILITY
ATDN
Cogent
Level3
Who else is Helping?
THANK YOU