QUIC, Connection IDs and NAT

John Levine johnl at iecc.com
Tue Jun 1 03:50:54 UTC 2021


It appears that Robert Brockway <robert at timetraveller.org> said:
>Does the existence of Connection IDs separate from IP mean that 
>the host/IP contention ratio in CGNAT can be higher?  IE, can a single 
>CGNAT device provide Internet access for a greater number of end-users?

No, QUIC runs over UDP which runs over IP.  QUIC replaces the TCP sessions that a web
browser uses but the device is still doing all of the other IP stuff that it does.

I could imagine that the connection ID might slightly increase the load on a NAT since a device
might be hopping back and forth between networks, e.g. mobile and wifi, and be considered a new NAT
client each time it does.



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