Check out Kevin Wallace's 3750 qos video on YouTube.
Sent from my Verizon Wireless 4G LTE Smartphone -------- Original message -------- From: Brandon Bigelow <[email protected]> Date: 08/29/2013 14:28 (GMT-05:00) To: [email protected] Subject: [OSL | CCIE_RS] 3560 QoS I was wondering if someone could help me better understand queue mappings. The below is from the Cisco 3560 QoS guide. Configuring the CoS-to-DSCP Map You use the CoS-to-DSCP map to map CoS values in incoming packets to a DSCP value that QoS uses internally to represent the priority of the traffic. Configuring the DSCP-to-CoS Map You use the DSCP-to-CoS map to generate a CoS value, which is used to select one of the four egress queues. If the above is true, why do we need four maps for queues? cos-input-q cos-input queue map keyword cos-output-q cos-output queue map keyword dscp-input-q dscp-input queue map keyword dscp-output-q dscp-output queue map keyword Wouldn't we only need 2 or 3 since the newly formed CoS forms the map to egress queue? When would we ever use the dscp-output-q? I assume it all comes down to what you are trusting but this statement confuses me: "You use the DSCP-to-CoS map to generate a CoS value, which is used to select one of the four egress queues. " Thanks for your input _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
