The verify-source command verifies the source IP address of each received RIP Update packet.
The undo verify-source command disables the source IP address verification.
By default, source IP address verification is enabled.
Usage Scenario
After source IP address verification is enabled, a device checks the source address of each packet received by an interface to determine whether the source IP address and the IP address of the interface are in the same subnet. The packets from a different subnet are denied by the device.
NOTE: Do not disable source IP address verification in normal cases.