kern/181388: [route] Routes not updated on mtu change

[Joe Holden]

You have a good point wrt VLANs on Windows but everyone uses Intel nics.... 
right? :P

> -----Original Message-----
> From: Lev Serebryakov [mailto:lev at FreeBSD.org]
> Sent: 20 August 2013 23:07
> To: Joe Holden
> Cc: freebsd-net at freebsd.org
> Subject: Re: kern/181388: [route] Routes not updated on mtu change
>
> Hello, Joe.
> You wrote 20 ??????? 2013 ?., 18:21:22:
>
> >> JH> vlan interfaces achieve the same thing without having to mess
> >> JH> about with mtus on routes and also give you an interface to work
> >> JH> with, a much nicer method comparatively.
> >>   But it could put huge load on routing between these two segments
> >> and/or requires managed switches.
> >>
> JH> Neither really, don't need a managed switch to use dot1q and if
> JH> you're routing between segments with a box, then you shouldn't be
> JH> using multiple ranges in the same broadcast domain anyway.
> JH> Networking 101
>
>  (1) As far as I know, Windows works very badly with VLANs, it depends on
> drivers and Windows doesn't have unified VLAN management/support,
> opposite  to UNIX systems. My desktop adapter (Atheros AR8121), for
> example, supports  VLANs on hardware level and it works with FreeBSD, but
> "desktop windows" (not  Windows Server) drivers doesn't provide any way
> to set VLAN.  So, to put  any Windows system, driver- and adapter-
> independent, to VLAN, you need to  assign VLAN at switch on per-port basis.
> You need managed switch. Maybe,  something was changed in Windows 8, I
> don't know, but Windows 7 (even  Ultimate edition) doesn't have any VLAN
> management.
>
>  (2) As far as I understand, "topicstarter" has Windows and FreeBSD
> machines  in one segment (with different MTUs) and you suggest to put
> them in  different segments (via VLANs), so there WAS NO routing at all, and
> now it  is two segments, which needs  routing between them. But, maybe, I
> understood John-Mark Gurney wrong, and they had two broadcast domains
> on  one network (and double-addressed interface in router).
>
>
> --
> // Black Lion AKA Lev Serebryakov <lev at FreeBSD.org>