Subject: Re: PR 28783 --> /dev/null?
To: Johan =?ISO-8859-1?Q?Ihr=E9n?= <johani@johani.org>
From: Zafer Aydogan <zafer@gmx.info>
List: current-users
Date: 11/16/2004 16:33:01
NetBSD beta.sst.net 2.99.10 NetBSD 2.99.10 (GENERIC.MP) #0: Thu Oct 21
10:47:40 CEST 2004 
# ifconfig vlan1 create
# ifconfig vlan1 vlan 1 vlanif ex0
# ifconfig vlan1
vlan1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        vlan: 1 parent: ex0
        address: 00:50:da:3f:43:e2
        inet6 fe80::250:daff:fe3f:43e2%vlan1 prefixlen 64 scopeid 0x9
# ifconfig vlan1 down
# ifconfig vlan1 destroy

System did not crashed :) so far. 
It's curious, that the system needs 15 seconds to setup vlan1 and 11 seconds
to destroy. ?! :/

You should look at PR 27678 aswell:
http://news.gw.com/netbsd.bugs/29499