carp on stable/9: is there a way to keep jumbo? (fwd)

[Steven Hartland]

You might want to try:-
http://blog.multiplay.co.uk/dropzone/freebsd/carp-mtu.patch

Be warned it doesn't do any validation so if you use it against physical
interfaces with a smaller MTU things will likely go badly wrong, hell
they may go badly wrong anyway as its just a very quick and dirty hack ;-)

    Regards
    Steve
----- Original Message ----- 
From: "Dmitry Morozovsky" <marck at rinet.ru>
To: <freebsd-stable at FreeBSD.org>
Sent: Monday, March 04, 2013 10:49 PM
Subject: carp on stable/9: is there a way to keep jumbo? (fwd)


> Collegaues,
> 
> sorry, sent to the wrong list (the only escuse for me is possibly that I'm 
> trying to make HAST base on carp...)
> 
> -- 
> Sincerely,
> D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
> [ FreeBSD committer:                                 marck at FreeBSD.org ]
> ------------------------------------------------------------------------
> *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
> ------------------------------------------------------------------------
> 
> ---------- Forwarded message ----------
> Date: Tue, 5 Mar 2013 02:31:51
> From: Dmitry Morozovsky <marck at rinet.ru>
> To: freebsd-fs at freebsd.org
> Subject: carp on stable/9: is there a way to keep jumbo?
> 
> Dear collesagues,
> 
> yes, I know glebius@ overhauled carp in -current, but I'm a bit nervous to 
> deploy bleeding edge system on a NAS/SAN ;)
> 
> So, my question is about current state of carp in stable/9: building HA pair I 
> found that carp interfaces lose jumbo capabilities:
> 
> root at cthulhu4:~# ifconfig | grep mtu
> em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 9000
> em1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 9000
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
> lagg0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu 9000
> carp0: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
> carp1: flags=49<UP,LOOPBACK,RUNNING> metric 0 mtu 1500
> root at cthulhu4:~# ifconfig carp1 mtu 9000
> ifconfig: ioctl (set mtu): Invalid argument
> 
> Is it unavoidable at the moment, or am I missing something obvious?
> 
> Thanks!
> 
> -- 
> Sincerely,
> D.Marck                                     [DM5020, MCK-RIPE, DM3-RIPN]
> [ FreeBSD committer:                                 marck at FreeBSD.org ]
> ------------------------------------------------------------------------
> *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck at rinet.ru ***
> ------------------------------------------------------------------------
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