An administrator wishes to enable network port mirroring based on source port. Which feature should be
enabled?
A.
vSphere standard switch port
B.
ERSPAN
C.
NSX Virtual Wire
D.
VLAN
Explanation:
https://blogs.vmware.com/vsphere/2011/08/vsphere-5-new-networking-features-port-mirroring.html
D – OK
https://docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.hostclient.doc/GUID-42C0D7D4-E0DB-462D-BC49-4E8464B6E2F5.html
2
2
D,
https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.networking.doc/GUID-81309F10-D7FF-447C-9D35-58CA3DDA53B1.html
Enter a valid VLAN ID in the field. This information is required for Remote Mirroring Source port mirroring sessions.
3
1
D
1
1
I say B.
ERSPAN is a new feature in VMWare 6.5. See https://www.vmware.com/content/dam/digitalmarketing/vmware/en/pdf/whitepaper/vsphere/vmw-white-paper-vsphr-whats-new-6-5.pdf
Page 34.
1
0
B – I’m inclined to agree since the question doesn’t mention remote mirroring source.
3
0
I’m also leaning towards B, this is a delta exam and its listed neatly in the release notes…
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0
D
https://docs.vmware.com/en/VMware-vSphere/6.5/vsphere-esxi-vcenter-server-65-networking-guide.pdf – pag 218
Enter a valid VLAN ID in the field This information is required for
Remote Mirroring Source port mirroring sessions.
Mark the check box next to Preserve original VLAN to create a VLAN ID
that encapsulates all frames at the destination ports. If the original frames
have a VLAN and Preserve original VLAN is not selected, the
encapsulation VLAN replaces the original VLAN
0
1
Looks like B is the right answer. One of the vSphere 6.5 network enhancements is to support ERSPAN
ERSPAN mirrors traffic on one or more “source” ports and delivers the mirrored traffic to one or more
“destination” ports on another switch. vSphere 6.5 includes support for the ERSPAN protocol.
3
0
It is true that “vSphere 6.5 includes support for the ERSPAN protocol”.
You have different Port Mirroring Session Types. only one of them is ERSPAN
Distributed Port Mirroring:
Mirror packets from a number of distributed ports to other distributed ports on the same host . If the source and the destination are on different hosts, this session type does not function.
Remote Mirroring Source:
Mirror packets from a number of distributed ports to specific uplink ports on the corresponding host.
Remote Mirroring Destination: (only this one needs VLAN to be SET)
Mirror packets from a number of VLANs to distributed ports.
Encapsulated Remote Mirroring (L3) Source:
Mirror packets from a number of distributed ports to the IP addresses of a remote agent . The virtual machine’s traffic is mirrored to a remote physical destination through an IP tunnel .
Distributed Port Mirroring (legacy):
Mirror packets from a number of distributed ports to a number of distributed ports and/or uplink ports on the corresponding host.
The question is poorly formulated and there is no definite answer to this one 🙁
4
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They’ve added support for ERSPAN, it’s not something that you tick to enable.
5
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You do tick it. When adding a port mirroring session, choose “Encapsulated Remote Mirroring (L3) Source” and you get to choose Encapsulation type. You can select GRE (default), ERSPAN Type II and ERSPAN Type III
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I’m going for B – ERSPAN (since it is a feature)
NOT D – VLAN is not a feature that can be enabled. It’s a setting.
5
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I’m agree with answer B. This is explained in the link below:
https://docs.extrahop.com/6.2/configure-erspan-vmware/
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