That would lead me to believe that I can do DSCP on a switch. If that's the case then when would I do DSCP vs CoS?
From: desmond Black [mailto:[email protected]] Sent: Wednesday, August 19, 2009 2:45 PM To: Bodnar, Edward; 'prakash patel'; [email protected] Subject: Re: [OSL | CCIE_RS] QOS question The DSCP to DSCP mapping you refering to is actually Mutation-Map which is done on a Trusted QOS boundary but needs change. Example would be 2 Companies merging networks. The other company's network has already marked the type of traffic in their own way in DSCP but then your company has a different Policy for that traffic. So rather than again Classifying and then marking.............you simply use a Mutation map and do 1-to-1 mapping. Desmond Black, In Pursuit of CCIE!! India ----- Original Message ----- From: "Bodnar, Edward" To: "'prakash patel'" , "[email protected]" Subject: Re: [OSL | CCIE_RS] QOS question Date: Wed, 19 Aug 2009 13:15:57 -0500 So any time I pass from a layer 2 device to a layer 3 device I need to translate the CoS to DSCP. And any time I go from a layer 3 device to layer 2 device I need to translate DSCP to CoS? If this is true then why do that have DSCP to DSCP translations in switches ? From: prakash patel [mailto:[email protected]] Sent: Wednesday, August 19, 2009 2:09 PM To: Bodnar, Edward; [email protected] Subject: RE: [OSL | CCIE_RS] QOS question Layer 2 devices connection ...USE COS LAYER 3 devices use DSCP. ________________________________ From: [email protected] To: [email protected] Date: Wed, 19 Aug 2009 13:01:01 -0500 Subject: [OSL | CCIE_RS] QOS question When would I use CoS over DSCP or DSCP over CoS. ________________________________ With Windows Live, you can organize, edit, and share your photos. Click here.<http://www.windowslive.com/Desktop/PhotoGallery> _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com -- Be Yourself @ mail.com Choose From 200+ Email Addresses Get a Free Account at www.mail.com<http://www.mail.com>!
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