Egde/Origin in Vhost.xml

I was reading a post from November 2009 about configuring the Edge/Origin Vhost.xml file. The sample configuration from that post reccommended this config to the user who was asking:

<VirtualHost> 
    <Proxy>
        <Mode>remote</Mode>
        <Anonymous>true</Anonymous>
        <CacheDir enabled="true" useAppName="true"></CacheDir>
        <LocalAddress>10.11.100.100</LocalAddress>
        <RouteTable protocol="">
            <RouteEntry>*:1935*;10.11.191.19:1935</RouteEntry>
            <RouteEntry>*:80;10.11.191.19:80</RouteEntry>
        </RouteTable>
        <EdgeAutoDiscovery>
            <Enabled>false</Enabled>
            <AllowOverride>true</AllowOverride>
            <WaitTime>1000</WaitTime>
        </EdgeAutoDiscovery>        
    </Proxy>
</VirtualHost>

My question is, since I am also using a back-up Origin server, would I need to add the ip addresses of both my primary Origin and back-up Origin to the RouteTable?

<RouteTable protocol="">

     <RouteEntry>*:1935*;primary.mysite.com:1935</RouteEntry>

      <RouteEntry>*:1935*;backup.mysite.com:1935</RouteEntry>
      <RouteEntry>*:80;primary.mysite.com:80</RouteEntry>

     <RouteEntry>*:80;backup.mysite.com:80</RouteEntry>

</RouteTable>