Refer to the exhibit.
Assume that there is no disjoint Layer 2 configuration. Based on the output, what will happen if
uplink eth1/7 on FI-A fails?
A.
The host will lose Ethernet uplink connectivity on FI-A.
B.
Fabric failover will force the vNIC that is bound to FI-A to use uplink eth1/7 on FI-B.
C.
Cisco UCS Manager will disable the host vNIC that is connected to FI-A.
D.
Traffic from any hosts using this pin group will use e1/8 on FI-A.
I don’t get it why is D the correct asnwer can someone confirm?
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it seems that those two ports form a port-channel
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If it is a port-channel there is output like this:
Lanit-UCS-A /eth-uplink/pin-group # show expand
Ethernet Pin Group:
Name: TEST_LAN_GROUP_A
Ethernet Pin Target:
Fabric Endpoint
—— ——–
A fabric/lan/A/pc-1
B fabric/lan/B/pc-1
Lanit-UCS-A /eth-uplink/pin-group #
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I believe the answer should be B, any thoughts?
“Static pinning should be used in scenarios in which a deterministic path is required. When the target (as shown on Figure 6) on Fabric Interconnect A goes down, the corresponding failover mechanism of the vNIC goes into effect, and traffic is redirected to the target port on Fabric Interconnect B.”
http://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/unified-computing/whitepaper_c11-701962.html
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Both Fabric Interconnects are in Active/Active mode with respect to Ethernet data traffic movement. Each server is pinned to a single Fabric Interconnect uplink port or port channel. This means that the data traffic from some servers will move using Fabric Interconnect A and for other servers using Fabric Interconnect B.
In case of a northbound uplink or port channel failure where a server is currently pinned to, the server connection will be automatically pinned to another port or port channel on the same Fabric Interconnect. In case of a complete Fabric Interconnect failure, the server will be automatically pinned to any uplink port or port channel on the second Fabric Interconnect provided that the Fabric failover is configured for the vNIC. The Fabric Interconnect will update the northbound switch about this change using Gratuitous Address Resolution Protocol (GARP).
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What you’re saying (dtreview) is correct, but it is related to dynamic pinning. However, in this case we have a static pinning. With static pinning in case of Northbound uplink failure, the pinned server will be moved to the other fabric interconnect as per the pinning group. I believe the answer should be “B”, unless there is some gotcha that I have missed.
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