By default, an interface receives both RIPv1
and RIPv2 packets but sends only RIPv1 packets. When configuring RIPv2
on an interface, you can specify the mode in which the interface sends
packets. If no RIP version number is configured in the interface view,
the global RIP version is used. The RIP version set on an interface
takes precedence over the global RIP version.
The RIP-1 protocol
poses a security risk, and therefore the RIP-2 protocol is recommended.