201 · Question #297
What is the purpose of MAC masquerading?
The correct answer is C. to minimize connection loss due to ARP cache refresh delays. MAC masquerading ensures that a consistent MAC address is presented by the active device in a high-availability pair to minimize network disruptions during failovers.
Question
What is the purpose of MAC masquerading?
Options
- Ato prevent ARP cache errors
- Bto minimize ARP entries on routers
- Cto minimize connection loss due to ARP cache refresh delays
- Dto allow both BIGIP devices to simultaneously use the same MAC address
How the community answered
(32 responses)- A3% (1)
- B6% (2)
- C88% (28)
- D3% (1)
Why each option
MAC masquerading ensures that a consistent MAC address is presented by the active device in a high-availability pair to minimize network disruptions during failovers.
While MAC masquerading helps prevent issues related to ARP caches, 'ARP cache errors' is too broad; its specific purpose is to manage cache consistency during failover to avoid connection loss.
Minimizing ARP entries is not the primary purpose of MAC masquerading; its main goal is to ensure MAC address stability across failovers.
MAC masquerading prevents network devices, such as routers and switches, from experiencing ARP cache refresh delays when a failover occurs and a new BIG-IP device becomes active. By maintaining the same virtual MAC address, client connections are not dropped due to stale ARP entries, ensuring seamless service continuity during a failover event.
MAC masquerading allows an active device to use a specific MAC address, but the goal is to maintain that MAC during failover, not for both BIG-IPs to simultaneously use it which would cause conflicts.
Concept tested: MAC masquerading in high availability failover
Source: https://techdocs.f5.com/en-us/bigip-15-0-0/big-ip-system-network-failover/network-failover.html
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