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Date:      Tue, 05 Oct 2021 01:54:05 +0000
From:      bugzilla-noreply@freebsd.org
To:        net@FreeBSD.org
Subject:   [Bug 243554] multicast packets not seen on PHY bridge member
Message-ID:  <bug-243554-7501-YwRLbA1x1V@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-243554-7501@https.bugs.freebsd.org/bugzilla/>
References:  <bug-243554-7501@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243554

--- Comment #8 from James Blachly <james.blachly@gmail.com> ---
(In reply to Patrick M. Hausen from comment #7)

>You must not put IP addresses on bridge member interfaces. All addresses m=
ust go on the bridge.

> This is documented in the handbook page for bridging:
> https://docs.freebsd.org/en/books/handbook/advanced-networking/#network-b=
ridging

>> If the bridge host needs an IP address, set it on the bridge interface, =
not on the member interfaces.

> I don't know if this already fixes your problem or if there is still a bu=
g preventing multicast from working, but your setup is definitely wrong if =
you have an IP address on a member interface.

So that I am 100% clear, are you suggesting the following:

1. Physical interface, say, igb0 exists and passes traffic on the lan
2. User desires to create bridge for use with bhyve
3. User/bhyve accessory software creates bridge, adding igb0 as member and
tap0...N for M Virtual machines
4. User should REMOVE IP from igb0 and ADD IP to the bridge (does not have =
one
by default)

?

> Kristof Provost has confirmed that putting an IP address on a member IF b=
reaks multicast!

Can you point me to this?

Regards

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