Refer to the Exhibit. An engineer is installing a new pair of routers in a redundant configuration. When checking on the standby status of each router the engineer notices that the routers are not fun

Question

Exhibits

Options

• Aconfigure matching hold and delay timers
• Bconfigure matching key-strings
• Cconfigure matching priority values
• Dconfigure unique virtual IP addresses

• A
  5% (2)
• B
  15% (6)
• C
  8% (3)
• D
  73% (29)

Explanation

HSRP Redundancy Configuration Explanation

Option D is correct because in an HSRP (Hot Standby Router Protocol) redundant configuration, both routers must share the same virtual IP address - this is the IP address that clients use as their default gateway. If the routers have different virtual IP addresses configured, they cannot form a proper standby group, causing the redundancy to fail entirely.

Why the distractors are wrong:

• Option A (hold/delay timers): Mismatched timers may affect failover timing but won't prevent the standby relationship from forming altogether
• Option B (key-strings): Authentication mismatches would prevent peers from recognizing each other, but the exhibit's configuration suggests a virtual IP issue rather than authentication
• Option C (priority values): Priority only determines which router is active vs. standby - mismatched priorities won't break the redundancy relationship

Memory Tip: Think of the virtual IP as the "team jersey number" - both routers must wear the same number to play on the same HSRP team. Without a matching virtual IP, the routers are essentially on two different teams and can never coordinate as active/standby partners. When troubleshooting HSRP, always verify the virtual IP first.

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