Cisco
352-001 · Question #692
352-001 Question #692: Real Exam Question with Answer & Explanation
The correct answer is C: Add secondary links to REP segments 1 and 2. Adding secondary links to existing REP segments integrates the DB cluster into the current ring topology, providing high-bandwidth Layer 2 paths with sub-second failover for database replication.
Question
Refer to the exhibit. A new high availability DB server cluster is installed in the network. These two servers require high bandwidth and low latency Layer 2 connectivity for database replication. Which solution supports these requirements?
Exhibit
Options
- AAdd two new links between SW1 and SW2 configured as LACP trunk with STP
- BAdd two new links between SW1 and SW2 configured as REP segments 1 and 2, respectively
- CAdd secondary links to REP segments 1 and 2
- DAdd two new links between SW1 and SW2 configured as REP segment 3
Explanation
Adding secondary links to existing REP segments integrates the DB cluster into the current ring topology, providing high-bandwidth Layer 2 paths with sub-second failover for database replication.
Common mistakes.
- A. LACP trunk aggregates bandwidth effectively but the inclusion of STP means redundant ports will be blocked or face reconvergence delays of up to 30-50 seconds with classic STP, which is incompatible with the low-latency requirement for DB replication.
- B. Configuring the new links as separate REP segments 1 and 2 conflicts with existing segment IDs already assigned in the ring, causing a configuration error and failing to properly integrate the DB servers into the current REP ring topology.
- D. Adding a new REP segment 3 between SW1 and SW2 creates an isolated segment outside the established ring topology, which does not leverage the ring's redundancy mechanism and does not provide an optimal Layer 2 path for the DB cluster.
Concept tested. REP secondary links for Layer 2 high availability
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