kern/163803: vlan does not work

[Karl Pielorz]

The following reply was made to PR kern/163803; it has been noted by GNATS.

From: Karl Pielorz <kpielorz at tdx.co.uk>
To: bug-followup at FreeBSD.org, kes-kes at yandex.ru
Cc:  
Subject: Re: kern/163803: vlan does not work
Date: Thu, 20 Mar 2014 16:22:36 +0000

 Hi,
 
 I stumbled across this PR the other day - having a similar issue setting up 
 VLANs under 10.x in this case.
 
 After much head scratching I found, for example on a freshly installed, run 
 up FBSD 10.x box:
 
 ifconfig bge1.100 create
 ifconfig bge1.100 192.168.0.20 netmask 255.255.255.0
 
 [and equivalent on the other side]
 
 Doesn't work - you see ARP requests flying around - but no traffic is 
 exchanged.
 
 However, doing:
 
 ifconfig bge1 up
 
 (i.e. Bringing up the 'parent' / underlying NIC on both machines)
 
 After a few seconds - everything 'works', and traffic does flow over the 
 VLAN (i.e. ARP requests are answered etc.)
 
 Whether this is the same issue, whether it's a "bug" that the interface 
 isn't brought 'up' when the vlan virtual interface is created - who knows.
 
 Similar thing happens for LAGG interfaces - unless you have a dummy:
 
   ifconfig_bge1="UP"
 
 In /etc/rc.conf - LAGG configs don't work either.
 
 Anyway, just thought I'd post a followup to this - incase this 'fixes' (or 
 at least sheds light) on the original issue.
 
 -Karl