{"id":817,"date":"2010-04-20T13:04:12","date_gmt":"2010-04-20T12:04:12","guid":{"rendered":"http:\/\/mccltd.net\/blog\/?p=817"},"modified":"2015-02-21T09:21:25","modified_gmt":"2015-02-21T09:21:25","slug":"qos-1p3q3t-queuing","status":"publish","type":"post","link":"http:\/\/darenmatthews.com\/blog\/?p=817","title":{"rendered":"QoS &#8211; 1P3Q3T Queuing"},"content":{"rendered":"<p>The Cisco 2960, 2970, 3560 and 3750 Catalyst switches support a 1p3q3t que model which provides 3 thresholds in which to drop traffic. <!--more--><\/p>\n<p>The first two thresholds are configurable, while the last threshold is always 100% of the queue. It is advisable to map scavenger class traffic (DSCP 8 or cs1) to queue 4 and configure the threshold to 40% of the queue. This will allow the WTD system to drop scavenger class traffic more aggressively.<\/p>\n<p>The following commands map DSCP 8 to queue 4, threshold 1. Queue 4, threshold 1 is then configured to tail drop packets when 40% of the queue is utilised.<\/p>\n<p>mls qos srr-queue output dscp-map queue 4 threshold 1 8<br \/>\nmls qos queue-set output 1 threshold 4 40 100 100 100<\/p>\n<div id=\"attachment_818\" style=\"width: 498px\" class=\"wp-caption aligncenter\"><a rel=\"attachment wp-att-818\" href=\"http:\/\/darenmatthews.com\/blog\/?attachment_id=818\"><img aria-describedby=\"caption-attachment-818\" loading=\"lazy\" class=\"size-full wp-image-818\" title=\"1p3q1t\" src=\"http:\/\/darenmatthews.com\/blog\/wp-content\/uploads\/2010\/04\/1p3q1t.jpg\" alt=\"1p3q1t - Queuing Model\" width=\"488\" height=\"353\" srcset=\"http:\/\/darenmatthews.com\/blog\/wp-content\/uploads\/2010\/04\/1p3q1t.jpg 488w, http:\/\/darenmatthews.com\/blog\/wp-content\/uploads\/2010\/04\/1p3q1t-300x217.jpg 300w\" sizes=\"(max-width: 488px) 100vw, 488px\" \/><\/a><p id=\"caption-attachment-818\" class=\"wp-caption-text\">1p3q1t - Queuing Model<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>The Cisco 2960, 2970, 3560 and 3750 Catalyst switches support a 1p3q3t que model which provides 3 thresholds in which to drop traffic.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[83,76],"tags":[21],"_links":{"self":[{"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/817"}],"collection":[{"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=817"}],"version-history":[{"count":6,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/817\/revisions"}],"predecessor-version":[{"id":877,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/817\/revisions\/877"}],"wp:attachment":[{"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=817"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}