Apache VirtualHost

I'm looking a solution for this one on apache configuration.

Problem: URL : test.sample.org/tes1 = test1.sample.org

and i want to redirect it to test1.sample.org if i have existing sud domain

Below is the solution : I'm running my Apache 2.2 on CentOS 5.0

Server configuration

NameVirtualHost 172.20.30.40

<VirtualHost 172.20.30.40>
# primary vhost
DocumentRoot /www/subdomain
RewriteEngine On
RewriteRule ^/.* /www/subdomain/index.html
# ...
</VirtualHost>

<VirtualHost 172.20.30.40>
DocumentRoot /www/subdomain/sub1
ServerName www.sub1.domain.tld
ServerPath /sub1/
RewriteEngine On
RewriteRule ^(/sub1/.*) /www/subdomain$1
# ...
</VirtualHost>

<VirtualHost 172.20.30.40>
DocumentRoot /www/subdomain/sub2
ServerName www.sub2.domain.tld
ServerPath /sub2/
RewriteEngine On
RewriteRule ^(/sub2/.*) /www/subdomain$1
# ...
</VirtualHost> 


Reference: