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Date: Thu, 07 Feb 2008 01:04:37 +0000
From: "Bruce M. Simpson" <bms@FreeBSD.org>
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To: Mike Silbersack <silby@FreeBSD.org>
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Cc: cvs-src@FreeBSD.org, src-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/netinet ip_id.c
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Mike Silbersack wrote:
>  
>   Note that this commit does not yet enable random IP ID
>   generation by default.  There are still some concerns
>   that doing so will adversely affect performance.
>   

Random ip_id generation also breaks MANET multicast as it's currently 
specified -- the ip_id field gets used for histogram based duplicate 
packet detection. However, after my inveigling, Fred Templin at Boeing 
brought encapsulation back into the proposal on the table.

So some way to turn this stuff off on a per-interface basis is probably 
going to be needed later on for mobile stuff...

later
BMS