Trying to configure Syslog over SSL

Im trying to create an SSH key per the Solution Article at the following link:

 

https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/tmos_management_guide_10_1/tmos_logging.html?sr=155090781022653

 

I'm currently running 11.6, but couldn't find the manual on how to configure for syslog over SSL/TLS. When I run the command in the article (ssh -b 2048 -f syslog_tunnel_ID -t rsa -N "" -P "") I get the following error:

 

Pseudo-terminal will not be allocated because stdin is not a terminal

 

ssh: syslog_tunnel_ID: Temporary failure in name resolution

 

To avoid this error I tried the command: ssh -b 2048 -f syslog_tunnel_ID -t rsa -N "" -P ""

 

But still got the secondary error. ssh: syslog_tunnel_ID: Temporary failure in name resolution

 

I'm sure I'm missing something obvious, but can't see it. Why am i getting what seems to be a DNS error. Aren't I just creating a file and a key?