Stateful Service Enablement on Tier-0 Gateway
Question
When a stateful service is enabled for the first time on a Tier-0 Gateway, what happens on the NSX Edge node?
Answers
Explanations
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A. B. C. D.B.
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When a stateful service is enabled for the first time on a Tier-0 Gateway in VMware NSX-T Data Center, the NSX Edge node undergoes a process called Service Router (SR) instantiation.
The SR is responsible for handling stateful services such as Distributed Firewall (DFW), Network Address Translation (NAT), and Load Balancing (LB) on the NSX-T Edge node. During SR instantiation, the Edge node deploys a new virtual machine (VM) instance that will serve as the SR.
The process of SR instantiation can be automatic or manual, depending on the configuration and settings of the NSX-T environment. If the automatic instantiation option is enabled, the SR will be automatically instantiated and connected to the Data Router (DR), which is the component responsible for routing traffic to the physical network.
In the case of option B, which states that "SR is instantiated and automatically connected with DR," this is the correct answer. When a stateful service is enabled for the first time on a Tier-0 Gateway, the SR is automatically instantiated and connected to the DR to provide stateful services for traffic flowing through the Tier-0 Gateway.
Option A, which states that "SR and DR doesn't need to be connected to provide any stateful services," is incorrect because the SR and DR must be connected to provide stateful services such as DFW, NAT, and LB.
Option C, which states that "SR and DR is instantiated but requires manual connection," is also incorrect because, as mentioned above, the SR instantiation process can be automatic or manual depending on the NSX-T environment configuration. If the automatic option is enabled, the SR will be automatically connected to the DR.
Option D, which states that "DR is instantiated and automatically connected with SR," is incorrect because the DR is always present in the NSX-T environment, and it is the SR that is instantiated when a stateful service is enabled on a Tier-0 Gateway.
