[BEHAVE] Home NAPT44 - How many ports?

"Rajiv Asati (rajiva)" <rajiva@cisco.com> Wed, 05 June 2013 13:14 UTC

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From: "Rajiv Asati (rajiva)" <rajiva@cisco.com>
To: "v6ops@ietf.org" <v6ops@ietf.org>, "Softwires-wg list (softwires@ietf.org)" <softwires@ietf.org>, "behave@ietf.org" <behave@ietf.org>
Thread-Topic: Home NAPT44 - How many ports?
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Date: Wed, 5 Jun 2013 13:14:06 +0000
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Cc: "Erik Kline \(ek@google.com\)" <ek@google.com>
Subject: [BEHAVE] Home NAPT44 - How many ports?
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Some of you may recall our discussion (during the last IETF) around "how many TCP/UDP ports are enough with NAPT44" per home, as ISPs move into A+P paradigm. ~500, ~1000, ~3000???

Well, I started monitoring my home router and plotting the NAPT44 port utilization on a minute-by-minute basis. You may find it here - http://www.employees.org/~rajiva

In short, port range of 500 seems ok, though 1000 would be more than enough for my home. Suffice to say, this is just a sample representation, since the port utilization would vary home to home, based on number of active devices, type of applications, the degree of simultaneous device or application usage etc.

If any of you are doing similar monitoring, then please share.

Cheers,
Rajiv

PS: Thanks to Erik Kline, who explained (with sufficient details) how to use google charting for my data. And thanks to Xun Wang & Shaoshuai Dai for helping me out significantly.

PS: My home has 3-4 active devices.