Monitoring multiple nodes on a remote site

Hi everyone

We have NPM server on datacenter & most of nodes placed on branch office.

Existing Practice 1

For our existing practice, we have a double NAT. (1st on branch office firewall, 2nd on datacenter firewall because orion web not allow different node with same IP)

Example:

NPM IP: 192.168.0.1/16

Branch Public IP: 2.2.2.2

Monitored Nodes Address: 192.168.0.2:161, 192.168.0.3:161 (Virtual IP on datacenter)

Datacenter 1st NAT: 192.168.0.2:161 -> 2.2.2.2:1161

                                 192.168.0.3:161 -> 2.2.2.2:1162

Branch 2nd NAT: 2.2.2.2:1161 -> 10.10.0.1:161

                              2.2.2.2:1162 -> 10.10.0.2:161

Practice 2

To simplfy our routing job I using python to add nodes & found API allow adding nodes by same IP with different SNMP port, so I think the 2nd NAT no longer required & less configuration is required.

Example:

NPM IP: 192.168.0.1

Branch Public IP: 2.2.2.2

Monitored Nodes Address: 2.2.2.2:1161, 2.2.2.2:1162 (No virtual IP is needed)

Branch NAT: 2.2.2.2:1161 -> 10.10.0.1:161

                     2.2.2.2:1162 -> 10.10.0.2:161

I am still testing 1-3 days to observe the result. Does anyone have tried the practice 2 and any potential cons for it?