ApacheServer VirtualHost

Following works fine:
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<VirtualHost *:80>
    ServerName   "devops"
    DocumentRoot "/www/example1/html"
    <Directory />
        AllowOverride None
        Require all granted
    </Directory>
    ErrorLog     "/www/example1/log/error.log"
    CustomLog    "/www/example1/log/access_log" combined
</VirtualHost>
<VirtualHost *:80>
    ServerName   www.mydomain.com
    ServerAlias  mydomain
    DocumentRoot "/www/example2/html"
    <Directory />
        AllowOverride None
        Require all granted
    </Directory>
    ErrorLog     "/www/example2/log/error.log"
    CustomLog    "/www/example2/log/access_log" combined
</VirtualHost>
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Following doesn't:
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<VirtualHost 32.64.128.7:80>
    ServerName   "devops"
    DocumentRoot "/www/example1/html"
    <Directory />
        AllowOverride None
        Require all granted
    </Directory>
    ErrorLog     "/www/example1/log/error.log"
    CustomLog    "/www/example1/log/access_log" combined
</VirtualHost>
<VirtualHost *:80>
    ServerName   www.mydomain.com
    ServerAlias  mydomain
    DocumentRoot "/www/example2/html"
    <Directory />
        AllowOverride None
        Require all granted
    </Directory>
    ErrorLog     "/www/example2/log/error.log"
    CustomLog    "/www/example2/log/access_log" combined
</VirtualHost>
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