Building MPLS-Based Broadband Access VPNs - download pdf or read online

By Kumar Reddy

ISBN-10: 1587051362

ISBN-13: 9781587051364

Enforce the layout rules and configurations at the back of MPLS-based VPNs for broadband entry networks.The publication discusses how MPLS and its VPN provider are top utilized in a broadband atmosphere, targeting key layout matters and recommendations, including:How to control tens of hundreds of thousands of interfaces and host routes and hundreds of thousands of dynamic VPNs.When a digital domestic Gateway is necessary.Why use dynamic tackle assignmentHow routes might be summarized into the core.This ebook is a part of the Networking know-how sequence from Cisco Press' which deals networking execs precious info for developing effective networks, realizing new applied sciences, and development winning careers.

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Although the use of route aggregation is well understood in large IP networks, it has not been widely used in DSL wholesale scenarios, where traffic is tunneled, not routed, to the ISP. Route aggregation is one of the challenges that reappears with IP VPNS and will be discussed further in later chapters. In the next section, you will see how to create the subscriber routes automatically, instead of statically as in this section. Keep in mind, however, the importance of being able to aggregate as early as possible: You don't want tons of /32 routes wandering around your network.

Figure 2-11 shows a typical network architecture. Like DSL, LRE can use twisted-pair wiring. Figure 2-11. LRE Solution [View full size image] 47 48 A typical LRE deployment scenario would be a hotel that wants to offer data and voice services to its guests. Because all hotels already have a telephone network, it makes sense to use this expensive infrastructure for data transmission rather than rewire. And because the data traffic is all Ethernet based, it makes no sense to use true DSL, which would require ATM.

The use of gratuitous ARP is typically used for man-in-the-middle attacks. As you can gather from the preceding explanation, ARP attacks are limited only to stations that are on the same broadcast domain as the offending attacker. • DoS attacks DoS attacks can be mounted in many ways. Some simple examples include using gratuitous ARPs to fill the CAM table on an Ethernet switch; using DHCP requests to exhaust IP addresses; or sending a very large number of Layer 3 flows to the default router. DoS attacks often use some form of address spoofing.

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Building MPLS-Based Broadband Access VPNs by Kumar Reddy

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