350-401 · Question #886
Which of the following are true statements regarding the Virtual Router Redundancy Protocol (VRRP) feature? (Choose two.)
The correct answer is A. Pre-emption is enabled by default D. Secondary IP addresses are supported with VRRP. VRRP provides high availability for default gateways by enabling preemption by default and supporting secondary IP addresses for its virtual router configurations.
Question
Which of the following are true statements regarding the Virtual Router Redundancy Protocol (VRRP) feature? (Choose two.)
Options
- APre-emption is enabled by default
- BThe router priority is a configurable value from 0-4095
- CMD5 authentication is supported with VRRP
- DSecondary IP addresses are supported with VRRP
- EVRRP can only be used with Cisco devices
How the community answered
(14 responses)- A93% (13)
- B7% (1)
Why each option
VRRP provides high availability for default gateways by enabling preemption by default and supporting secondary IP addresses for its virtual router configurations.
By default, VRRP enables preemption, meaning a router with a higher priority will immediately assume the master role if it becomes available, taking over from a lower-priority master. This ensures that the most preferred router is always the active one.
The router priority in VRRP is a configurable value ranging from 1 to 254, with 255 reserved for the IP address owner, not 0-4095.
While VRRPv2 supports MD5 authentication, VRRPv3 removed authentication fields, and it is not a universally implemented or primary authentication mechanism across all VRRP versions and vendors.
VRRP supports secondary IP addresses, allowing the virtual router to act as the default gateway for multiple IP subnets or specific services by responding to ARP requests for these additional IP addresses.
VRRP is an open-standard protocol (RFC 3768, RFC 5798), which means it can be implemented and used with network devices from various vendors, not just Cisco.
Concept tested: VRRP features and defaults
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fhrp/configuration/xe-16/fhrp-xe-16-book/fhrp-vrrp.html
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