June 2003
Intermediate to advanced
504 pages
12h 29m
English
Content preview from MPLS and VPN Architectures, Volume IIBecome 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,
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MPLS-Based VPNs
MPLS-based VPN technology uses a combination of connection-oriented and connectionless VPN technologies, including the following features:
The interface between the CE routers and the PE routers is connectionless. No additional configuration is needed on the CE devices.
The PE routers use a modified IP forwarding paradigm; a distinct IP routing and forwarding table (called virtual routing and forwarding table, or VRF) is created for each customer.
The customer's addresses are extended with 64-bit route distinguishers to make nonunique 32-bit IP addresses globally unique within the service providers' backbone. The resulting 96-bit addresses are called VPNv4 addresses.
A single routing protocol is run between the PE routers for all ...
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