2V0-622D · Question #7
An administrator wishes to enable network port mirroring based on source port. Which feature should be enabled?
The correct answer is B. ERSPAN. ERSPAN (Encapsulated Remote Switched Port Analyzer) is the vSphere Distributed Switch feature that enables port mirroring based on source port by encapsulating mirrored traffic for delivery across Layer 3 networks.
Question
An administrator wishes to enable network port mirroring based on source port. Which feature should be enabled?
Options
- AvSphere standard switch port
- BERSPAN
- CNSX Virtual Wire
- DVLAN
How the community answered
(25 responses)- A4% (1)
- B92% (23)
- C4% (1)
Why each option
ERSPAN (Encapsulated Remote Switched Port Analyzer) is the vSphere Distributed Switch feature that enables port mirroring based on source port by encapsulating mirrored traffic for delivery across Layer 3 networks.
vSphere Standard Switches do not support port mirroring sessions of any type - this capability is exclusive to vSphere Distributed Switches.
ERSPAN is a port mirroring session type available on vSphere Distributed Switches that allows an administrator to designate specific source ports whose traffic is copied, encapsulated in GRE, and forwarded to a remote IP destination across a routed network. It is the correct vSphere mechanism when source-port-based mirroring must traverse a Layer 3 boundary.
NSX Virtual Wire is a network virtualization overlay construct for tenant network segmentation and has no role in port mirroring or traffic capture.
VLANs are a Layer 2 broadcast domain segmentation mechanism and do not provide port mirroring or traffic monitoring capability.
Concept tested: vSphere Distributed Switch ERSPAN port mirroring sessions
Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.networking.doc/GUID-CA70B3EC-CACC-46DE-BD85-BA01AB9CCF70.html
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