FreeBSD router problems

Barney Cordoba barney_cordoba at
Mon Jul 15 14:57:24 UTC 2013

On Sun, 7/14/13, Eugene Grosbein <eugen at> wrote:

 Subject: Re: FreeBSD router problems
 To: "Barney Cordoba" <barney_cordoba at>
 Cc: "isp" <mline at>, freebsd-net at
 Date: Sunday, July 14, 2013, 1:17 PM
 On 14.07.2013 23:14, Barney Cordoba
 > So why not get a real 10gb/s card? RJ45 10gig is here,
 > and it works a lot better than LAGG.
 > If you want to get more than 1Gb/s on a single
 > you'd need to use roundrobin, which will alternate
 > without concern for ordering. Purists will argue
 against it,
 > but it does work and modern TCP stacks know how to deal
 > with out of order packets.
 Except of FreeBSD's packet reassembly is broken for long
 For example,

NFS has been broken since the beginning of time.  NFS has always
had problems sending segments > the packet size.

There are a lot of ISPs that load balance multiple feeds
so OOO packets are a normal occurrence. A stack that doesn't 
handle out of order tcp packets doesn't work in today's world.


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