I would think you would still need to do a DSCP to CoS mapping then back to DSCP. I am looking at some configuration and then seem to just pass the DSCP mapping right through the switches.
From: prakash patel [mailto:[email protected]] Sent: Wednesday, August 19, 2009 2:28 PM To: Bodnar, Edward; [email protected] Subject: RE: [OSL | CCIE_RS] QOS question FOr internal schduling /queing ________________________________ From: [email protected] To: [email protected]; [email protected] Date: Wed, 19 Aug 2009 13:15:57 -0500 Subject: RE: [OSL | CCIE_RS] QOS question 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> ________________________________ Get back to school stuff for them and cashback for you. Try BingT now.<http://www.bing.com/cashback?form=MSHYCB&publ=WLHMTAG&crea=TEXT_MSHYCB_BackToSchool_Cashback_BTSCashback_1x1>
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