200-155 · Question #207
Which result occurs when communication fails between a VSM and a VEM?
The correct answer is A. The new active VSM broadcasts requests to all VEMs to switch to the new active VSM device. When communication fails between an active VSM and a VEM in a Cisco Nexus 1000V deployment, the system initiates a high-availability process to restore control plane communication.
Question
Which result occurs when communication fails between a VSM and a VEM?
Options
- AThe new active VSM broadcasts requests to all VEMs to switch to the new active VSM device.
- BThe VEM queries VMware vCenter for a new configuration.
- CThe VEM is disabled and an administrator must bring the VEM up.
- DThe VEM stops forwarding packets until communication to the VSM can be established.
How the community answered
(31 responses)- A84% (26)
- B3% (1)
- C3% (1)
- D10% (3)
Why each option
When communication fails between an active VSM and a VEM in a Cisco Nexus 1000V deployment, the system initiates a high-availability process to restore control plane communication.
In a redundant Cisco Nexus 1000V deployment, if the active VSM fails or communication is lost, a standby VSM becomes active and broadcasts requests to all VEMs, prompting them to switch their communication to the newly active VSM to maintain control and configuration synchronization.
VEMs primarily receive their switching configuration and control plane instructions from the VSM, not directly from VMware vCenter, which manages the virtual infrastructure but not the Nexus 1000V's internal operations.
Concept tested: Cisco Nexus 1000V high availability
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000v/sw/4_2_1_s_1_4/configuration/guide/n1000v_n_HA/ha.html
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