Can the AR router implement one-to-one mapping between multiple port numbers

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The AR router can be configured with static NAT or the NAT server to implement one-to-one mapping, for example, nat server protocol tcp global 1.1.1.2 21 inside 10.3.0.30 21.

Other related questions:
Can the AR router implement one-to-one mapping of multiple port numbers?
AR router can configure NAT static and NAT port to achieve one to one mapping. For example: NAT server TCP global 1.1.1.2 21 inside 10.3.0.30 21 server.

What is the difference between NAT server and static NAT
The difference between the NAT server and static NAT is as follows: The NAT server changes only the address but not the port number when an internal device accesses the external network. The device enabled with static NAT changes the IP address and port number when an internal device accesses the external network.

Can one extension number correspond to multiple long numbers on the U1900?
No. One short number corresponds to only one long number.

Can packets on multiple interfaces be mirrored to one observing port on AR routers and how many interfaces can be mirrored
Multiple interfaces can be mirrored to one observing port on AR routers. There is no limit for the number of interfaces that can be mirrored to one observing port. You need to consider whether actual traffic of the observing port is larger than its forwarding capacity, that is, whether the actual traffic is larger than the maximum bandwidth of the observing port.

Is There a One-to-One Mapping Between a Node Pool and a Tier?
A node pool can belong to one tier only, but a tier can have one or multiple node pools.

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