300-170 · Question #156
What is the acceptable latency for local VEM to VSM communications?
The correct answer is A. 5 ms. For reliable communication between a local Virtual Ethernet Module (VEM) and Virtual Supervisor Module (VSM), the acceptable latency is 5 ms.
Question
What is the acceptable latency for local VEM to VSM communications?
Options
- A5 ms
- B10 ms
- C20 ms
- D100 ms
How the community answered
(21 responses)- A90% (19)
- B5% (1)
- C5% (1)
Why each option
For reliable communication between a local Virtual Ethernet Module (VEM) and Virtual Supervisor Module (VSM), the acceptable latency is 5 ms.
Cisco's documentation specifies that the acceptable latency for communication between a VEM and its VSM should be no more than 5 milliseconds to ensure proper operation and avoid communication issues.
10 ms latency is generally considered too high and can lead to instability or performance degradation in VEM-VSM communications.
20 ms latency is significantly above the recommended threshold and would cause substantial operational problems.
100 ms latency is far beyond any acceptable limit for VEM-VSM communication and would render the system inoperable or highly unstable.
Concept tested: Cisco Nexus 1000V VEM-VSM latency requirements
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000v/sw/4_0/install/guide/n1000v_install/n1000v_install_prereq.html
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