[cisco-voip] IP Precedence and IPSec

[Luan Nguyen]

By default, the tos bits will be copied to both the gre and ipsec
packet.  qos pre-classify allows the original packet to be copied so
that one could clasify according to things like source/destination ip
address, port...etc


On Fri, 4 Feb 2005 17:52:15 -0600, Walenta, Phil
<philip.walenta at berbee.com> wrote:
> By default the prec bits or DSCP will not be copied.  You need to
> perform a "qos pre-classify" in your tunnel to allow this to happen.
> 
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of su1droot
> Sent: Friday, February 04, 2005 4:44 PM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] IP Precedence and IPSec
> 
> Hello,
> I have a problems that I can't seem to find any documentation either
> way on.   We are running voice over a GRE/IPSec tunnel.  I know when a
> packet is encapsulated in a GRE tunnel the IP Precedence bits are copied
> on to the GRE packet, but I am unable to find any docs that say if the
> Precedence bit is copied outside an IPSec packet.  Does anyone know if
> it does or does not copy this bit?  I'm guessing it does not.
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