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Re: Broadcast traffic on vlans leaks into the parent interface on NetBSD-5.1

Brian Buhrow <> writes:

>       Hello.  I've just noticed an issue where broadcast traffic on vlans
> also shows up on the parent interface.  My environment is NetBSD-5.1/i386
> with the wm(4) driver.  I'm not sure yet if the problem is specific to the
> wm(4) driver or if it's a more general issue.  The bug  didn't exist in
> NetBSD-4.x.
> To repeat, set up a vlan in addition to the parent interface as a subnet.
> Then, run dhcpd so that it can listen and hand out addresses on both
> networks.  Put a dhcp client on the vlan and watch its broadcasts show up
> on both the vlan and parent interfaces of the dhcp serving box.
>       Has anyone else seen this issue?  Should I file a bug?

What do you mean 'shows up'?  Are you using tcpdump/pcap?  Is it wrong
for vlan-tagged traffic to appear on the parent?  Or do you mean packets
arriving at the IP layer?

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