300-620 · Question #160
A network engineer configures the Cisco ACI fabric to connect to vCenter with these requirements: - Port groups must be automatically created on the distributed virtual switch. - Port groups must use
The correct answer is A. Create a dynamic VLAN pool with the VLAN range of 20-30.. To meet the requirements of automatic port group creation on a distributed virtual switch, use a specific VLAN range, and optimize CAM space, a dynamic VLAN pool configured with the specified VLAN range is the correct choice.
Question
A network engineer configures the Cisco ACI fabric to connect to vCenter with these requirements:
- Port groups must be automatically created on the distributed virtual
switch.
- Port groups must use the VLAN allocation in the range between 20-30.
- The deployment must optimize the CAM space on the leaf switches.
Which set of actions meets these criteria?
Options
- ACreate a dynamic VLAN pool with the VLAN range of 20-30.
- BCreate a dynamic VLAN pool with the VLAN range of 20-30.
- CCreate a static VLAN pool with the VLAN range of 20-30.
- DCreate a static VLAN pool with the VLAN range of 20-30.
How the community answered
(58 responses)- A81% (47)
- B5% (3)
- C3% (2)
- D10% (6)
Why each option
To meet the requirements of automatic port group creation on a distributed virtual switch, use a specific VLAN range, and optimize CAM space, a dynamic VLAN pool configured with the specified VLAN range is the correct choice.
Creating a dynamic VLAN pool allows Cisco ACI to automatically allocate VLANs from the specified range (20-30) to leaf switches only when they are actively used by endpoints, which optimizes CAM space. This setup also facilitates automatic port group creation on the distributed virtual switch when integrating with vCenter.
Creating a static VLAN pool would provision all VLANs in the range (20-30) to all relevant leaf switches, consuming more CAM space and not optimizing its usage.
Creating a static VLAN pool would provision all VLANs in the range (20-30) to all relevant leaf switches, consuming more CAM space and not optimizing its usage.
Concept tested: ACI dynamic VLAN pools and CAM optimization
Source: https://www.cisco.com/c/en/us/td/docs/dcn/aci/apic/5x/config-guide/cisco-aci-virtualization-guide-5x/m_configuring_vlan_pool_types.html
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