Two Huawei devices R1 and R2 form a VRRP backup group. R1 is VRRPV2, and R2 is VRRPV3. Which of the following descriptions about the backup group is correct?

Question

Options

• AAfter R2 configures the command vrrp version-3 send-packet-mode v2v3-both, it can exchange VRRP packets with R1
• BAfter R2 configures the command vrrp version-3 send-packet-mode v3-only, it cannot exchange VRRP packets with R1
• CAfter R2 configures the command vrrp version-3 send-packet-mode v2-only, it can exchange VRRP packets with R1
• DBy default, R1 and R2 can exchange VRRP packets

• A
  9% (3)
• B
  3% (1)
• C
  14% (5)
• D
  74% (26)

Explanation

On Huawei routers, VRRPv3 includes built-in backward compatibility with VRRPv2: by default, a VRRPv3 device can both send and process VRRPv2-format advertisements, so R1 and R2 can form a functioning backup group and exchange VRRP packets without any additional configuration, making D correct.

Option A is wrong because v2v3-both mode is already the Huawei VRRPv3 default, so explicitly configuring that command does not change the outcome - the statement misleadingly implies exchange requires this manual step when the devices already interoperate out of the box.

Option B is wrong because configuring v3-only send mode does not fully break the exchange in this Huawei scenario; R2 still processes incoming VRRPv2 packets from R1, so the devices continue to participate in the backup group despite R2 sending only v3-format advertisements.

Option C is wrong because switching R2 to v2-only mode is unnecessary and removes VRRPv3 functionality, so while it might seem like a safe workaround, it is not a correct or recommended description of how exchange is achieved.

Memory tip: On Huawei, v3 talks to v2 by default - no handholding required. If a question suggests you must configure a command to make VRRPv2 and VRRPv3 coexist, that is usually the trap; the correct answer points to default behavior.

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