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Date:      Thu, 19 Feb 2015 15:17:38 +0000
From:      Karl Pielorz <kpielorz_lst@tdx.co.uk>
To:        Michael MacLeod <mikemacleod@gmail.com>, Miguel Clara <miguelmclara@gmail.com>
Cc:        freebsd-xen@freebsd.org
Subject:   Re: [Bug 188261] [xen] FreeBSD DomU PVHVM guests cannot 'route' traffic for other Xen PV guests on same Dom0 Host.
Message-ID:  <96E16668BD46052D41141B94@[10.12.30.106]>
In-Reply-To: <CAM-FeoEiy3%2BQxRaHvv-uEQFVh58_VvDPdn2qQnBi9nVAKB%2BXwA@mail.gmail.com>
References:  <bug-188261-23905@https.bugs.freebsd.org/bugzilla/> <bug-188261-23905-ex4KZu4rIz@https.bugs.freebsd.org/bugzilla/> <54E4D37A.7010905@pdsvelebit.hr> <CADGo8CVAQiVsujpu5mi9=B-Z_dBremZtQEt=RwZ-cDakXia5ZA@mail.gmail.com> <CAM-FeoEiy3%2BQxRaHvv-uEQFVh58_VvDPdn2qQnBi9nVAKB%2BXwA@mail.gmail.com>

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--On 18 February 2015 14:49 -0500 Michael MacLeod <mikemacleod@gmail.com> 
wrote:

> I've been using the OSS Xen releases for years, and have never been able
> to get PVM domU to be functional as a gateway - I've either had to use
> HVM or setup a separate box as the router. This has been the case since
> at least FBSD8 I think, or whenever XENHVM became an option.

As the original bug filer...

I've tried FBSD 9, 10 and 11 - I was hoping (under the "you never know" 
banner) that XS 6.5 with updated Xen etc. might make a difference - but 
sadly it doesn't, as people have pointed out - it's a likely issue with 
netfront/back code in FBSD.

This is a real pain for us - apart from the hours initially wasted figuring 
it out - and the 'accidents' when people forget, we either have a bunch of 
non-agile machines polluting our main pools, or a secondary "pool of shame" 
where all the FBSD boxes that do things like VPN, routing, DHCP, 
firewalling are running in HVM mode [and again, not agile]. Performance of 
HVM NIC's and  disk isn't as good as PV either (as you'd expect).

I have the stuff to test this setup in house here - I just don't know where 
to start to look at it :( - but open to suggestions ;)

Cheers,

-Karl



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