Cisco CCNP / BCMSN Exam Tutorial: Multicasting And The RPF Check - 0 views

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  #1 Hinton Rollins on 09 Sep 13

   

  Multicasting is a crucial subject on your BCMSN, CCNP, and CCIE exams, and it can also be quite confusing when you 1st commence studying it. Multicasting makes use of ideas that are in contrast to anything you've run into in your routing protocol studies, and that can throw you at very first. I speak from knowledge that multicasting is like any other Cisco technologies - understand the fundamentals, master the fundamentals, and then develop your expertise on that foundation.
  
  A single such basic is the RPF Check, or Reverse Path Forwarding Check.
  
  A basic difference between unicasting and multicasting is that a unicast is routed by sending it toward the destination, whilst a multicast is routed by sending it away from its supply.
  
  "toward the destination" and "away from its source" sound like the exact same factor, but they are not. A unicast is going to comply with a single path from source to destination. The only aspect the routers care about is the destination IP address - the source IP address isn't a element.
  
  With multicast routing, the destination is a multicast IP group address. It's the multicast router's job to choose which paths will lead back to the source (upstream) and which paths are downstream from the supply. Reverse Path Forwarding refers to the router's behavior of sending multicast packets away from the supply rather than toward a certain destination.
  
  The RPF Examine is run against any incoming multicast packet. The multicast router examines the interface that the packet arrived on. If the packet comes in on an upstream interface - that is, an interface identified on the reverse path that leads back to the source - the packet passes the examine and will be forwarded. If the packet comes in on any other interface, the packet is dropped.
  
  The RPF Verify serves to verify the integrity of your multicasting network, and also serves as a reminder that the simple operation of multicasting is a lot distinct than unicasting!. Dig up additional information on a partner article by clicking http://howtoloweruricacid.com.

   

  <div class="cArrow"> </div><div class="cContentInner">Multicasting is a crucial subject on your BCMSN, CCNP, and CCIE exams, and it can also be quite confusing when you 1st commence studying it. Multicasting makes use of ideas that are in contrast to anything you've run into in your routing protocol studies, and that can throw you at very first. I speak from knowledge that multicasting is like any other Cisco technologies - understand the fundamentals, master the fundamentals, and then develop your expertise on that foundation. <br /> <br /> A single such basic is the RPF Check, or Reverse Path Forwarding Check. <br /> <br /> A basic difference between unicasting and multicasting is that a unicast is routed by sending it toward the destination, whilst a multicast is routed by sending it away from its supply. <br /> <br /> "toward the destination" and "away from its source" sound like the exact same factor, but they are not. A unicast is going to comply with a single path from source to destination. The only aspect the routers care about is the destination IP address - the source IP address isn't a element. <br /> <br /> With multicast routing, the destination is a multicast IP group address. It's the multicast router's job to choose which paths will lead back to the source (upstream) and which paths are downstream from the supply. Reverse Path Forwarding refers to the router's behavior of sending multicast packets away from the supply rather than toward a certain destination. <br /> <br /> The RPF Examine is run against any incoming multicast packet. The multicast router examines the interface that the packet arrived on. If the packet comes in on an upstream interface - that is, an interface identified on the reverse path that leads back to the source - the packet passes the examine and will be forwarded. If the packet comes in on any other interface, the packet is dropped. <br /> <br /> The RPF Verify serves to verify the integrity of your multicasting network, and also serves as a reminder that the simple operation of multicasting is a lot distinct than unicasting!. Dig up additional information on a partner article by clicking <a rel="nofollow" href="http://www.howtoloweruricacid.com/">http://howtoloweruricacid.com</a>.</div>

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