By Kumar Reddy
Enforce the layout ideas and configurations in the back of MPLS-based VPNs for broadband entry networks.The publication discusses how MPLS and its VPN carrier are most sensible utilized in a broadband surroundings, targeting key layout concerns and suggestions, including:How to regulate tens of millions of interfaces and host routes and hundreds of thousands of dynamic VPNs.When a digital domestic Gateway is necessary.Why use dynamic handle assignmentHow routes will be summarized into the core.This e-book is a part of the Networking expertise sequence from Cisco Press' which bargains networking pros useful details for developing effective networks, knowing new applied sciences, and construction profitable careers.
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Extra resources for Building MPLS-Based Broadband Access VPNs
For neighbor-to-neighbor traffic, note that if a subscriber PC sends a packet to another subscriber connected to the same aggregation router, the flow of packets is identical to the upstream and downstream flows described here. It is important to understand that there is no direct Layer 2 path between subscribers and that all traffic must be routed, even when subscribers' circuits are terminated on the same physical port on the router. In Cisco IOS Software terms, the router in Figure 2-2 uses a logical point-to-point subinterface for each subscriber and treats each of these interfaces as a separate IP network.
Because the preceding sections are all about bridging, DHCP is the logical choice for dynamic address assignment. Statically configuring all the end-station addresses obviously is impossiblethe headaches this would create would completely outweigh any employment protection advantages for network operations staff. When using DHCP on a DSL network, you have two basic options: 39 40 • Configure a DHCP server on the aggregation router. This configuration is less common, but entirely possible. You will see configuration examples of Cisco IOS DHCP servers in the "Cable CMTS" section, later in this chapter.
6. R1 sends the ICMP packet, which is routed to R0. 2 in its routing table and finds the static route that points to PVC 1/32 on ATM interface 0/0/0. 0 network, they quickly grow to unmanageable sizes. It is a much better design to aggregate the routes as soon as possible, and using simple a static route to Null0 is a way to do this. 0/24, as indicated in Example 2-4. Example 2-4. RBE Static Routes on R0 with Null0 Route ! 0 Null0 ! 25. The following would happen: 1. 25, everything happens as before.
Building MPLS-Based Broadband Access VPNs by Kumar Reddy