一个子域正在运行，但不同 IP 中的类似内容子域不起作用

如何解决一个子域正在运行，但不同 IP 中的类似内容子域不起作用

两个子域中的内容相似。但是一个域有效，而另一个域不起作用。

Apache 主机文件。

merchant.clouspos.lk（这是有效的）

<VirtualHost *:80>
        # The ServerName directive sets the request scheme,hostname and port that
        # the server uses to identify itself. This is used when creating
        # redirection URLs. In the context of virtual hosts,the ServerName
        # specifies what hostname must appear in the request's Host: header to
        # match this virtual host. For the default virtual host (this file) this
        # value is not decisive as it is used as a last resort host regardless.
        # However,you must set it for any further virtual host explicitly.
        #ServerName www.example.com
        ServerName merchant.cloudpos.lk
        ServerAlias merchant.cloudpos.lk

        ServerAdmin webmaster@et.lk

        RedirectMatch 301 /ipgresponse_dfecVfBuvsdRkY24(.*) /main.html#/paymentprocessing$1

        DocumentRoot /var/www/merchant/html

        # Available loglevels: trace8,...,trace1,debug,info,notice,warn,# error,crit,alert,emerg.
        # It is also possible to configure the loglevel for particular
        # modules,e.g.
        #LogLevel info ssl:warn

        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

        # For most configuration files from conf-available/,which are
        # enabled or disabled at a global level,it is possible to
        # include a line for only one particular virtual host. For example the
        # following line enables the CGI configuration for this host only
        # after it has been globally disabled with "a2disconf".
        #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

merchant2.cloudpos.lk（重定向到不同站点）

<VirtualHost *:80>
        # The ServerName directive sets the request scheme,you must set it for any further virtual host explicitly.
        #ServerName www.example.com
        ServerName merchant2.cloudpos.lk
        ServerAlias merchant2.cloudpos.lk

        ServerAdmin webmaster@et.lk

        RedirectMatch 301 /ipgresponse_dfecVfBuvsdRkY24(.*) /main.html#/paymentprocessing$1

        DocumentRoot /var/www/merchant2/html

        # Available loglevels: trace8,it is possible to
        # include a line for only one particular virtual host. For example the
        # following line enables the CGI configuration for this host only
        # after it has been globally disabled with "a2disconf".
        #Include conf-available/serve-cgi-bin.conf
</VirtualHost>

请提供解决此问题的方法？两个子域的源代码相同。