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Zorluk: KolayFirst Hop Redundancy Protocols (HSRP and VRRP)

A network engineer is configuring Virtual Router Redundancy Protocol (VRRP) on a router interface that has been assigned the physical IPv4 address 10.1.1.1/2410.1.1.1/24. The engineer enters the command `vrrp 1 ip 10.1.1.1`. Which statement correctly describes the operational result of configuring the physical interface IP address as the VRRP virtual IP address?

  1. VRRP accepts the configuration, allowing the router to become the IP address owner with a priority automatically set to 255.Cevap
  2. B
    VRRP rejects the command because virtual IP addresses must be outside the physical IP subnet range.
  3. C
    VRRP requires the virtual IP address to be a unique, unassigned IP address in the subnet, identical to standard HSRP behavior.
  4. D
    VRRP accepts the configuration but forces the router into a backup role with a default priority of 100.

Cevap

VRRP accepts the configuration, allowing the router to become the IP address owner with a priority automatically set to 255.
In VRRP, an engineer can assign the physical interface IP address as the virtual IP address. When this is done, the router becomes the IP address owner and its priority is automatically assigned as 255, making it the active Master router for that VRRP group.

Adım Adım Çözüm

1
Identify the protocol and command syntax specified in the scenario.
The scenario uses VRRP (`vrrp 1 ip 10.1.1.1`) where the virtual IP address matches the primary physical interface IP address (10.1.1.110.1.1.1).
Understanding protocol-specific rules regarding virtual IP address assignment is essential.
2
Evaluate VRRP operational rules for IP address ownership.
RFC 5798 / VRRP standards state that if a router's physical interface IP address is configured as the VRRP virtual IP address, that router becomes the IP address owner.
VRRP permits virtual IP reuse, unlike HSRP which enforces separate virtual IP addresses.
3
Determine the resulting priority value for the IP address owner.
The IP address owner in VRRP automatically receives the highest possible priority value of 255.
This guarantees that the owner router will always become the Master router when functional.

Anahtar Kavram

VRRP IP Address Ownership and Priority Assignment
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