[cisco-voip] Query, how is dscp being set to ef on packets from AS5400

[Nick Matthews]

Well, kind of - if you're doing WFQ on the interface, which is the
default (or FIFO) on many platforms and IOS.  WFQ doesn't
automatically handle voice, but it does it much better than FIFO and
it's all done automagically.  It's not good enough for all cases, but
better than nothing.

Plus - on the 5300 you're probably only doing voice.  QoS only
prioritizes traffic.  If it's all voice there's nothing to prioritize.

Generally only have to worry about QoS at the bottleneck.

-nick

On Wed, Sep 7, 2011 at 3:49 PM, Joseph Mays <mays at win.net> wrote:
>> AS5400 IOS does this automatically EF for voice and AF31 for Signaling.
>> You can change the DSCP on the dial-peers
>
> I'm fine with the value, but I was preparing to set up some qos stuff on the
> AS5400 when I found this, so it makes me wonder how much is already
> automatically assumed. Are voice packets already receiving queuing priority
> on the AS5400's egress interface to our LAN then? Hopefully, yes, less work
> for me. :-)
>
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