Point dev URL to the default folder of a multisite

Question

In a multisite set up, the default domain www.domain.com point to the 'sites/default' folder.

I want a temporary subdomain point to the default site for development.

In the sites.php files I have:

$sites['dev.domain.com'] = 'default'; // this line can be removed due to the default behavior (see comment below)

$sites['sub1.domain.com'] = 'sub1.domain.com';

$sites['sub2.domain.com'] = 'sub2.domain.com';

$sites['sub3.domain.com'] = 'sub3.domain.com';

Pointing to the 'default' folder is not working for some reason? What is wrong?

Answer 1

Above settings are correct. But there was an error in the DNS settings.