Re: kern/55499: bridge doesn't bridge?

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

The following reply was made to PR kern/55499; it has been noted by GNATS.

From: Patrick Welche <prlw1%cam.ac.uk@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: kern/55499: bridge doesn't bridge?
Date: Thu, 23 Jul 2020 11:06:28 +0100

 A similar setup works fine with xen (eg vif = [ 'bridge=bridge5' ])`
 bridging xvif.
 
 I tried rump as I failed to bridge two qemu instances. Essentially
 create 2 tap(4) interfaces, add them to a bridge. Start qemu with
 
    -nic tap,ifname=tap0,model=virtio,mac=52:54:c0:a8:32:65,script=no,downroript=no
 
 add IP numbers on same subnet to the 2 qemu instances' vioif0
 interfaces, and expect to be able to ping between them, yet it
 fails. The bridge does learn the ethernet addresses unlike in the
 rump case.