What are two benefits of VXLANs over the segmentation limiting factors of traditional VLANs? (Choose two.)
- better utilization of available network paths
- rigid requirements on device placement
- eliminates the use of multitenant segments within the data center
- inefficient use of available network links
- flexible placement of multitenant segments throughout the data center
Explanation: Traditional VLANs have several limiting factors in modern data centers, specifically the inefficient use of network links due to Spanning Tree Protocol (STP) and rigid requirements on device placement based on physical Layer 2 boundaries. VXLAN overcomes these issues through the following benefits:
- Better utilization of available network paths: Unlike traditional VLANs that use STP to block redundant paths to prevent loops, VXLAN encapsulates frames into Layer 3 UDP packets. This allows the network to take full advantage of Layer 3 routing features like Equal-Cost Multipath (ECMP) and link aggregation, utilizing all available paths in the fabric.
- Flexible placement of multitenant segments: VXLAN decouples the overlay network from the physical underlay, allowing Layer 2 segments to be extended over the Layer 3 infrastructure. This eliminates the traditional Layer 2 boundaries that forced rigid device placement, enabling multitenant segments to be placed anywhere throughout the data center.
Additionally, while VLANs are limited to 4,094 IDs, VXLAN supports up to 16 million coexistent segments using 24-bit VXLAN Network Identifiers (VNIDs).
Related exam: Modules 23 – 26: Checkpoint Exam: Software-Defined Networking Answers (CCNP ENCOR v9)
