June 2008
Intermediate to advanced
526 pages
15h 34m
English
Content preview from MPLS-Enabled Applications: Emerging Developments and New Technologies
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
10.3. mVPN - PROBLEM DECOMPOSITION
Figure 10.1 shows the conceptual model of multicast in a VPN. Two VPNs, VPN A and VPN B, are shown. For simplicity, we assume that PIM-SM in the SSM mode is used within each VPN. A multicast source in site S of VPN A is sending traffic to receivers in sites R1 and R2 of the VPN. This delivery of traffic can be decomposed into three stages. First, the traffic must be delivered from the source to PE1. Then, it must be delivered from PE1 to PE2 and PE3, and finally from there to the appropriate CEs, CE4 and CE3. The same decomposition applies when a source in site S of VPN B is sending traffic to receivers in sites R1 and R2 of VPN B.
In order for the source in site S to send multicast traffic to receivers in sites R1 and R2, receivers in sites R1 and R2 must inform the source about their desire to receive the multicast traffic from the source. Propagation of this information from the receivers towards the source could be decomposed into three steps. First, this information must be delivered from the receivers to the PEs connected to the sites that contain the receivers - PE2 and PE3 in our example. Then, this information has to be propagated to the PE connected to the site that contains the source, PE1 in our example. Finally, this information has to be propagated from that PE to the source itself.
Figure 10.1. Forwarding multicast traffic in a VPN
From a routing point of view, the first and the third (last) step in the above decompositions ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.