[cisco-voip] Auto-QoS ?

Tue Jun 5 20:43:55 EDT 2007

Be afraid.

To be honest, I would suspect it works on any interface running 12.3T
or higher...

However, because it uses percents instead of hard bandwidth counts, I
am not a fan.

Jonathan

On 6/5/07, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
>
>
> i just tried on ethernet and it accepted the command.
>
> or at least tab completed it.
>
> i was 'fraid to press enter. ;)
> --------------------------------------------------------------------------------
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> "Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo."      WJR
>
>
> ----- Original Message -----
> From: Voll, Scott
> To: Jonathan Charles
> Cc: ciscovoip
> Sent: Tuesday, June 05, 2007 6:29 PM
> Subject: Re: [cisco-voip] Auto-QoS ?
>
> Can you do it on an ATM interface?
>
> Scott
>
> -----Original Message-----
> From: Jonathan Charles [mailto:jonvoip at gmail.com]
> Sent: Tuesday, June 05, 2007 2:58 PM
> To: Voll, Scott
> Cc: ciscovoip
> Subject: Re: [cisco-voip] Auto-QoS ?
>
> Oh, it also adds this:
>
> rmon event 33333 log trap AutoQoS description "AutoQoS SNMP traps for
> Voice Drop
> s" owner AutoQoS
> rmon alarm 33333 cbQosCMDropBitRate.34.5364641 30 absolute
> rising-threshold 1 33
> 333 falling-threshold 0 owner AutoQoS
>
>
> Jonathan
>
> On 6/5/07, Jonathan Charles <jonvoip at gmail.com> wrote:
> > On the Serial Interface:
> >
> > auto qos voip trust
> >
> > and it adds this:
> >
> > class-map match-any AutoQoS-VoIP-RTP-Trust
> >  match ip dscp ef
> > class-map match-any AutoQoS-VoIP-Control-Trust
> >  match ip dscp cs3
> >  match ip dscp af31
> >
> > policy-map AutoQoS-Policy-Trust
> >  class AutoQoS-VoIP-RTP-Trust
> >   priority percent 70
> >  class AutoQoS-VoIP-Control-Trust
> >   bandwidth percent 5
> >  class class-default
> >   fair-queue
> >
> > interface Serial0/0
> >  auto qos voip trust
> >  service-policy output AutoQoS-Policy-Trust
> >
> >
> > I don't like the percentages, I prefer to nail in the bandwidth on the
> > priority and bandwidth commands to match up with locations-based CAC.
> >
> > Jonathan
> >
> > On 6/5/07, Voll, Scott <Scott.Voll at wesd.org> wrote:
> > > You can setup Auto QoS on routers?  What's the command?
> > >
> > > Scott
> > >
> > > -----Original Message-----
> > > From: cisco-voip-bounces at puck.nether.net
> > > [mailto:cisco-voip-bounces at puck.nether.net] On Behalf
> Of Jonathan
> > > Charles
> > > Sent: Tuesday, June 05, 2007 2:27 PM
> > > To: Carter, Bill
> > > Cc: cbomba at s4nets.com; cisco-voip at puck.nether.net
> > > Subject: Re: [cisco-voip] Auto-QoS ?
> > >
> > > OK, but here's the question no one is answering...
> > >
> > > Saying "Auto-QOS sucks" is all well and good, but first off, some of
> > > us are not CCIEs... and also, have you ever actually experienced a
> > > voice quality issue with the Auto-QOS on Cisco switches?
> > >
> > > To be perfectly honest, I have come across so many installations
> (some
> > > quite large) with NO layer-2 QOS that I find it difficult to
> > > understand how it Auto-QOS could be a problem.
> > >
> > > That being said, when the 3560s first came out, Auto-QOS strangled
> > > non-priority traffic to about 4MB/sec on a GigE switch... (since
> fixed
> > > by code updates)...
> > >
> > > All in all, I think AQ has matured to a point of being perfectly
> > > acceptable for LAN Switching...
> > >
> > > On the other hand, I didn't even realize Auto-QOS was available for
> > > routers until recently (I was so comfortable with CBWFQ that I never
> > > even looked into the automatic way), when I did finally run into it,
> > > it just spews in the same config I would do by hand anyway...
> > >
> > >
> > >
> > > Jonathan
> > >
> > > On 6/5/07, Carter, Bill <bcarter at sentinel.com> wrote:
> > > > AutoQoS on the switches still maps COS 3 to DSCP AF31(26), when
> > > current
> > > > SRND and CM installations set call control to DSCP CS3(24).  I run
> > > > autoqos on the switches then adjust the map.
> > > >
> > > > -----Original Message-----
> > > > From: cisco-voip-bounces at puck.nether.net
> > > > [mailto:cisco-voip-bounces at puck.nether.net] On Behalf
> Of Jonathan
> > > > Charles
> > > > Sent: Tuesday, June 05, 2007 3:10 PM
> > > > To: Paul Choi
> > > > Cc: cbomba at s4nets.com; cisco-voip at puck.nether.net
> > > > Subject: Re: [cisco-voip] Auto-QoS ?
> > > >
> > > > I would agree on the Router-side.. but for the switches, it is far
> > > more
> > > > likely to have positive results than the manual method...
> > > > especially without years of experience configuring your queues...
> > > >
> > > > To be honest, the auto-qos dumps config into the switch that is,
> A:
> > > > Cisco TAC supported, B: Likely to work great and C: easy.
> > > >
> > > > Why wouldn't you use it? Unless you have a lot of SNA traffic or
> > > > something...
> > > >
> > > >
> > > > Jonathan
> > > >
> > > >
> > > > On 6/5/07, Paul Choi <asobihoudai at yahoo.com> wrote:
> > > > > Auto-QoS, better known as "QoS for idiots" (like
> > > > > myself) is a cookie cutter approach to your network. I think
> it's
> > > > > better not to use if you have the knowhow to implement QoS
> yourself.
> > > > >
> > > > > --- "Christopher M. Bomba" <cbomba at s4nets.com> wrote:
> > > > >
> > > > > > I have implemented QoS on multiple voice networks from 6500s
> to
> > > > > > 2950s.  I have done it always manually.  The network I am
> working
> > > on
> > > >
> > > > > > now is insisting on Auto-QoS.  I haven't done it before but
> only
> > > > > > heard horror stories from it.
> > > > > >
> > > > > > What are you thoughts on this?  This is a very large network
> that
> > > is
> > > >
> > > > > > going to have multiple clusters and thousands of devices
> connected
> > > > > > to the IPT network.
> > > > > >
> > > > > > Thanks,
> > > > > >
> > > > > > Chris
> > > > > >
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> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > >
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