A junior engineer is learning about uRPF configuration. Which instruction should be followed when a Cisco router is configured with uRPF?

A junior engineer is learning about uRPF configuration. Which instruction should be followed when a Cisco router is configured with uRPF?

• Use the show ip interface command to verify that uRPF is enabled on an interface.
• Configure URPF with loose mode on router interfaces that connect to subnets with end stations.
• Configure uRPF with strict mode when asymmetric routing occurs.
• Configure URPF with loose mode on uplinks.

Explanation: The show cef interface command is used to verify that CEF is enabled on an interface. When uRPF is configured on an interface, the correct mode should be chosen. If strict mode is used when asymmetric routing occurs, the legitimate traffic is dropped. Where asymmetric routing might occur, uRPF should be configured with loose mode, and where symmetric routing is guaranteed to occur, the strict mode should be used. On router interfaces that connect to subnets with end stations, strict mode is typically used, and on uplinks, loose mode is typically used.

Exam with this question: Chapter 22: Quiz - Infrastructure Security CCNPv8 ENARSI