A network administrator is designing a First Hop Redundancy Protocol (FHRP) deployment for a LAN segment. The design requirement dictates that the virtual default gateway IP address configured for host devices must be identical to the physical IP address assigned to the primary router's GigabitEthernet0/0 interface. Which protocol selection and operational characteristic accurately satisfies this design requirement?
- VRRP, because it permits the virtual IP address to match a physical interface IP address, making that router the IP address owner with a default priority of 255.Answer
- BHSRP version 1, because configuring an interface physical IP address as the standby IP address automatically elevates the router priority to 255.
- CHSRP version 2, because HSRPv2 updated its virtual MAC format to allow physical IP address mapping for backward compatibility.
- DBoth HSRP and VRRP, because both protocols natively allow assigning an active router's physical IP address as the virtual gateway address.
Answer
VRRP allows the virtual IP address to match a router's physical interface IP address, designating that router as the IP address owner with an effective priority of 255.
In VRRP, a router can be configured to use its own physical interface IP address as the virtual IP address for the redundancy group. When this occurs, the router becomes the IP address owner and its priority is fixed at 255, ensuring it acts as the Master router whenever its interface is active.
Step-by-Step Solution
Key Concept
VRRP IP Address Ownership vs HSRP Virtual IP Restrictions