https://efb97021.aww-3cz.pages.dev/tags/marking/ Recent content in Marking on Aaron's Worthless Words Hugo en Sun, 24 Jan 2010 00:00:00 +0000 https://efb97021.aww-3cz.pages.dev/posts/2010/01/ont-notes-queuing/ Sun, 24 Jan 2010 00:00:00 +0000 https://efb97021.aww-3cz.pages.dev/posts/2010/01/ont-notes-queuing/ <p>Here are some more notes from my studies.  Of course, no one cares about them but me, but it&rsquo;s my blog.  I’m sure someone will find it useful.  Please help to correct dumbass mistakes.</p> <ul> <li> <p>Congestion</p> <ul> <li>Speed mismatch - traffic leaves a lower-bandwidth interface than the one it came in on</li> <li>Aggregation problem - lots of links with one egress of equal bandwidth</li> <li>Confluence problem - a bunch of traffic needs to egress out of the same interface</li> </ul> </li> <li> <p>Queuing</p> https://efb97021.aww-3cz.pages.dev/posts/2010/01/ont-notes-classification-marking-and-nbar/ Fri, 22 Jan 2010 00:00:00 +0000 https://efb97021.aww-3cz.pages.dev/posts/2010/01/ont-notes-classification-marking-and-nbar/ <p>Here&rsquo;s another set of notes from my ONT studies.  I&rsquo;m sure someone will find it useful.  Please help to correct dumbass mistakes.</p> <ul> <li> <p>Classification is done with traffic desriptors</p> <ul> <li>Ingress interface</li> <li>CoS value on ISL or 802.1P frames</li> <li>Source/destination IP address</li> <li>IP Precedence or DSCP value</li> <li>MPLS EXP</li> <li>Application type</li> </ul> </li> <li> <p>Layer 3 QoS</p> <ul> <li>Type of Service (ToS) is 8-bit field.</li> <li>First 3 bits of ToS are the IP precedence.</li> <li>First 6 bits of ToS are the DSCP value.</li> <li>Last 2 bits of ToS are explicit congestion notification (ECN).</li> </ul> </li> <li> <p>Layer 2 QoS</p>