RIP Version 2 (RIPv2)
I’ll now spend a few paragraphs discussing RIPv2 before moving into the distance-vector,
Cisco-proprietary routing protocol IGRP.
RIP version 2 (RIPv2) is mostly the same as RIP version 1 (RIPv1). Both RIPv1 and RIPv2
are distance-vector protocols, which means each router running RIP sends its complete routing
tables out all active interfaces at periodic time intervals. Also, the timers and loop-avoidance
schemes are the same in both RIP versions—that is, holddown timers and split horizon rule.
Both RIPv1 and RIPv2 are configured as classful addressing (but RIPv2 is considered classless
because subnet information is sent with each route update), and both have the same administrative
distance (120). Table 3.12 describes the difference between the two protocols.
TABLE 3 . 1 1 Holding Down Rip Propagations
Command Meaning
passive-interface Prevents an interface from fully participating in a routing process
TABLE 3 . 1 2 RIPv1 vs. RIPv2
RIPv1 RIPv2
Distance vector Distance vector
Maximum hop count of 15 Maximum hop count of 15