xn ethernet issues as DOMU under NetBSD DOM0

[Roger Pau Monné]

On Mon, May 02, 2016 at 07:16:16PM +0000, Stephen Jones wrote:
> Hello, I'm seeing a problem with networking running under FreeBSD 10.3 as a XEN DOMU (HVM) on a NetBSD 7 XEN DOM0 (XEN45).
> In searching the list archives, I did see mentions of there being an issue with scatter/gather with symptoms affecting
> ssh connections in/out going and likely other network issues.  Are there sysctl parameters or other settings that could get
> around this issue?
> 
> The ssh symptom (as reported by others) looks like this:
> 
> debug1: Local version string SSH-2.0-OpenSSH_6.8 NetBSD_Secure_Shell-20150403
> debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2 FreeBSD-20160310
> debug1: match: OpenSSH_7.2 FreeBSD-20160310 pat OpenSSH* compat 0x04000000
> debug1: Remote is NON-HPN aware
> debug1: mac 0x0, -1 -1
> debug1: SSH2_MSG_KEXINIT sent
> Bad packet length 168430090.
> debug1: mac 0x0, -1 -1
> ssh_dispatch_run_fatal: message authentication code incorrect

Can you try with a HEAD snapshot? netfront has been recently reworked [0], 
so there's a chance it is already fixed there.

Roger.

[0] https://svnweb.freebsd.org/base?view=revision&revision=294442