DNS Setup - CNAME Records

First question, when you configure DNS settngs such as CNAME, A, and MX records, there is an option called TTL which is represented by a number - What is that?

Now I am trying to create a CNAME record that would point support.mydomain.com to some other specified URL

I successfully setup that CNAME [left TTL on 86400 since I didnt know what it does]

Now it has been over 48 hours and this CNAME still doesnt work. I think its because there is a built in A record that points *.mydomain.com to the server IP and since I dont actually have support.mydomain setup I think the priority of that A record is higher than the CNAME record..

There is no option in the Control Panel (HSphere) to set priority or modify the built in records..

Is there anyway that I can resolve this on my own without contacting the hosting company? I need my custom CName record to have higher priority than the built in A record.

 

 

 

 

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