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Routing TCP/IP, Volume 1, 2/e by Jennifer Carroll Jeff Doyle

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Chapter 6. RIPv2, RIPng, and Classless Routing

RIP Version 2 (RIPv2) is defined in RFC 1723[1] and is supported in IOS Versions 11.1 and later. RIPv2 is not a new protocol; rather, it is RIPv1 with some extensions to bring it more up to date with modern routing environments. These extensions are

  • Subnet masks carried with each route entry

  • Authentication of routing updates

  • Next-hop addresses carried with each route entry

  • External route tags

  • Multicast route updates

The most important of these extensions is the addition of a Subnet Mask field to the routing update entries, enabling the use of variable-length subnet ...

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