NetBSD Problem Report #50366

From  Sat Oct 24 20:40:07 2015
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Date: Sat, 24 Oct 2015 20:40:05 +0000 (UTC)
Subject: Multicasts don't work on udav(4)
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>Number:         50366
>Category:       kern
>Synopsis:       Multicasts don't work on udav(4)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Oct 24 20:45:00 +0000 2015
>Originator:     Radoslaw Kujawa
>Release:        7.99.21
NetBSD rpi 7.99.21 NetBSD 7.99.21 (RPI.201510220400Z) #0: Thu Oct 22 05:33:15 UTC 2015 evbarm
While chasing an unrelated bug, I wanted to test multicasts with another ethernet interface. Took an udav(4) lying around. To my surprise, multicasts don't work at all on udav(4). No multicast is ever received.

1. Install NetBSD.
2. Plug in udav(4).
3. Send multicasts from another machine
4. See no multicasts received on a machine with udav plugged.

I have no idea. Just a suspicion that it's related to multicast hash filter. 

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