Modify ons remote port on 11.2 cluster

Hi,
We have a 11.2.0.3 cluster of 3 nodes on Linux 5.
How do we change the remote port of the ONS from the default port of 6200  to 1260 for example ?
The example I found is:

srvctl stop nodeapps -n node2
onsconfig add_config host:port

Should there be a command to remove_config first before doing add_config ?

Thanks.

Kien

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