Newb VoIP End to End Qos Questions

I'm at a site that has Layer 3 Cisco switches and routers end to end. Cisco IP phones plug directly into Layer 3 switches with various routers in the core.
1) If all connections are Layer 3 do I need to concern myself with trusing COS? I would trust DSCP in this case yes?
2) Cisco phones by default send voice rtp audio with DSCP marked as EF, is that correct? If not, I know how to create policy-maps and reclassify it. My thought was it is already classified as high as possible.
3) I've read that QoS must be end to end or you don't really have a full implementation, as in the one device your traffic passes through that is not performing QoS will likely be running FIFO or WFQ, which do not give precedence to class based traffic. So in theory I need to implement CBWFQ or LLQ on every Layer 3 device end to end that RTP audio will touch. Do I have this correct?
4) If the voice traffic has the potential to travel to most Layer 3 devices in the network as it travels between the Call Manager and phones, I need to apply QoS outbound on each Layer 3 interface that is likely to be in a voice path yes?
Sorry, I'm a newb, I understand it in theory but I still hit the wall on occassion with my light saber while blindfolded.
Thanks, Mike

Hi
1) Yep - no trunk (dot1q/ISL) = no CoS as it's in the trunk header, so use DSCP.
2) Yep, traffic will be marked. You can trust it, or trust it conditionally in a service policy and police it.
3) Yep, more or less. It's very important that on any switches that have QoS enabled, you have proper trust states set on all the ports, otherwise the DSCP will be remarked to 0. This is worse that not particularly prioritizing voice on a particular device, as no other devices further down the chain will see any DSCP markings to act on.
4) Erm.. kind of. If it's a layer 3 link on a switch, then you don't configure it as you would on a router. The QoS is done in hardware, so your common/garden autoqos type config should see you right if you really don't know what you are doing. If you use auto qos voip trust, make sure you set it to mls qos trust dscp after as it will probably default to CoS. Best to keep it consistent...
Regards
Aaron
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Can you please refer any MM -enduser Question & ans reference website

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My iphone is locked i dont remember my icloud password end the question security Helpe meHelpe me

my iphone is locked i dont remember my icloud password end the question securityHelpe meHelpe me
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Guys,
Can I use this in my switched network design, (without using 802.1q tunneling as documentation always seems to mention this vlan in a vlan scenario???)
I have native vlans and I want to act upon the 802.1p CoS field from end-to-end in my switched network. If the packet happens to be in a native vlan, I cannot do this.
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pc------accessswitch--------distswitch/rtr
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Hi there,
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[att1.html]


Patrick Power wrote:
          > Thanx for your reply Prasad. I was surprised none of the Bea engineers
          > wished to touch this one. What do you suppose is up with that? Either
          > they are too busy, or possibly my question is too dumb.
          >
          I am from BEA so its not that we are not responding ;).
          >
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          >
          > <Netscape/IIS/Apache/WLS FRONT END> ----- <CLUSTER OF WEBLOGIC SERVER
          > > SERVING SERVLETS> --- <CLUSTER OF WEBLOGIC SERVERS SERVING EJB>
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          > 2) I would assume that <CLUSTER OF WEBLOGIC SERVERS SERVING SERVLETS> would
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          >
          > Cheers, Pat
          >
          > Prasad Peddada <[email protected]> wrote in message
          > news:[email protected]...
          > >
          > >
          > > Patrick Power wrote:
          > >
          > > > I know that this topic was addressed to some degree here in an earlier
          > > > posting, but I still have a question regarding the architecture
          > > > design:
          > > >
          > > > If configuring a front-end cluster for servlets/sessions and a
          > > > back-end cluster for remote services -- you route requests to the
          > > > back-end using the WLS proxy servlet. ok, got that part.
          > >
          > > Not quite. The typical scenario is
          > >
          > > <Netscape/IIS/Apache/WLS FRONT END> ----- <CLUSTER OF WEBLOGIC SERVER
          > > SERVING SERVLETS> --- <CLUSTER OF WEBLOGIC SERVERS SERVING EJB>
          > >
          > > You don't proxy and serve servlets from the same server.
          > >
          > > >
          > > > The question: Is there a single instance of the wls proxy servlet in
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          > > To prevent that you need to use some kind of h/w or software load
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          > >
          > > > Is it a single point of failure between the 2 clusters?
          > > >
          > > > Thanx in advance for your help.
          > > >
          > > > BTW, I think Wei, Kumar and the other Bea folks cruising this group
          > > > have been doing a bang-up job of providing badly-needed detail on this
          > > > subject area - material this largely absent from the documentation.
          > > > Good job.
          > > >
          > > >
          > >
          > > --
          > > Cheers
          > >
          > > - Prasad
          > >
          > >

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Edited by: DBA115102 on Mar 4, 2011 7:14 PM

Hello.
SQL> select p.period_name, ae.event_status_code, p.closing_status, h.AE_HEADER_ID
2 from ap_ae_headers_all h, ap_accounting_events_all ae, gl_period_statuses p
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5 and p.application_id = 200
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SQL>
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consult :
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Hello.
SQL> select p.period_name, ae.event_status_code, p.closing_status, h.AE_HEADER_ID
2 from ap_ae_headers_all h, ap_accounting_events_all ae, gl_period_statuses p
3 where ae.accounting_event_id = h.accounting_event_id
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SQL>
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I am trying to connect selected end points. I have drawn my open path and Illustrator is not letting me select my two anchor points. I keep getting selections of the entire path.
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Newb VoIP End to End Qos Questions

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