Re: [Spud] No. Operators don't need SPUD for mobile network management

Mikael Abrahamsson <> Thu, 21 July 2016 14:47 UTC

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Date: Thu, 21 Jul 2016 16:47:37 +0200 (CEST)
From: Mikael Abrahamsson <>
To: Frode Kileng <>
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Subject: Re: [Spud] No. Operators don't need SPUD for mobile network management
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On Thu, 21 Jul 2016, Frode Kileng wrote:

> The rule is that all "Internet traffic" is assigned the default bearer 
> and there's no differentiated handling of the traffic within this 
> bearer. It has been hinted that there's exceptions "somewhere" but as 
> long this claim is never substantiated, and there's no problem related 
> to this in today in mobile networks, we should conclude that PLUS is not 
> solving an existing problem related to mobile network management.

I know people that for instance have middle-boxes that drops unsolicited 
TCP SYN+ACK packets (no SYN was seen, now there is a SYN-ACK that the end 
system didn't seem to have requested).

This saves power for devices and it saves signaling resources in the 
ombile network. I've seen mobile networks melt down because of someone 
else being SYN-flooded with spoofed source addresses and the resulting 
"backscatter" was not doing the mobile network any good.

SPUD could be used to have similar benefits for non-TCP traffic, in that 
it might be easier to identify un-solicited traffic.

Mikael Abrahamsson    email: