[Astlinux-users] VLAN's and 802.1p priority

[Lonnie A. <li...@lo...>]

Hopefully this is of general academic interest...

I currently have many SPA-942 IP Phones and AstLinux (net4801) all  
connected via VLAN capable switches, networked on VLAN20.  My VLAN's  
are routed via m0n0wall (net4801) through a "tagged only" ethernet port.

But, the ethernet ports of the phones and net4801 are untagged, the  
switches are configured to add/strip the VLAN tags at the last few  
meters.

This all works well... but I have an Obsessive Network Tweaking  
Disorder ;) .  All my switches prioritize egress traffic based on the  
802.1p bits added along with the VLAN ID tag.

So, would I be smart in making all my internal voice traffic, VLAN  
tagged from phone to Astlinux (end to end)?   Easily done in the  
SPA-942's.

In AstLinux I assume:
VLANS="eth0.20"
EXTIF="eth0.20"

Would work in PBX only mode?

Question:  What does AstLinux set the 802.1p priority tags to?  Does  
asterisk sense the VLAN and set the 802.1p priority to 5 or 6 like  
the SPA-942 does?

 From a practical point of view, I doubt it makes much difference in  
my situation, but learning is half the fun.

Any experience is appreciated.

Lonnie