This chapter covers the following subjects:
RIP Version 2 (RIPv2) is defined in RFC 1723 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 ...