http://dorreke.wordpress.com/2008/03/10/goodstuff-about-catayst-qos/ A networking journal Thu, 06 Aug 2009 15:39:04 +0000 http://wordpress.com/ hourly 1 http://dorreke.wordpress.com/2008/03/10/goodstuff-about-catayst-qos/#comment-78 NMC Lab 11 « Kevin Dorrell’s CCIE Study Weblog Sat, 15 Mar 2008 15:27:29 +0000 http://dorreke.wordpress.com/?p=48#comment-78 [...] 11.14 - QoS.  This exercise was fairly easy once I remembered how to do it.  It’s just that I don’t understand the point of the exercise.  They have set WRED thresholds for the four queues according to the DSCP.  But isn’t it the DSCP that determines (indirectly) which queue the packet goes in anyway? Their choice of DSCP values for the greater threshold are DSCPs that would normally go into only one queue.  Wouldn’t the task have made more sense if they had asked us to put AF11, AF21, AF31, AF41 into the threshold 2, and the rest in threshold 1 ?  How is this feature used in real life? [...] [...] 11.14 – QoS.  This exercise was fairly easy once I remembered how to do it.  It’s just that I don’t understand the point of the exercise.  They have set WRED thresholds for the four queues according to the DSCP.  But isn’t it the DSCP that determines (indirectly) which queue the packet goes in anyway? Their choice of DSCP values for the greater threshold are DSCPs that would normally go into only one queue.  Wouldn’t the task have made more sense if they had asked us to put AF11, AF21, AF31, AF41 into the threshold 2, and the rest in threshold 1 ?  How is this feature used in real life? [...]

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