Router Behind Router using R7900 and ASUS RT-N12 N300

[Mahen485]

I want to setup following configuration , Anyone done this ? and where can I find instruction to do this setup 

1. Modem to R7900 

2. wired connection from R7900 to Another Router ( in my case ASUS RT-N12 N300 )

3. R7900 will have his own Name and passward to connect for Wifi, Wired decided can connect and get new ip

4. Second Router will have it's own name and can assign ip address and can be connected Wifi or wired.

Why I am doing this ?

I want to instill DD-WRT on the second router and use VPN IPVanish service

Also R7900 does not support DD-WRT, depending on which router I connect I can get VPN service,

Appriciate your help

[michaelkenward · Accepted solution]

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@Mahen485 wrote:

1. Modem to R7900 

2. wired connection from R7900 to Another Router ( in my case ASUS RT-N12 N300

Two routers on your network can cause headaches. For example, you can end up with local address problems. Among other things, the other router can misdirect addresses that the Netgear router usually handles, such as routerlogin.net or the usual IP address for a router, 192.168.1.1.

This explains some of the other drawbacks.

What is Double NAT? | Answer | NETGEAR Support

Unless you have specific reasons for using two routers – to create two separate networks for example – it is often easier to use just one router and then to set up the second router as a wifi access point. Netgear advises this, as does just about every site you will visit.

It may be possible to put the modem/router into modem only (bridge) mode and then to use the second device as the router. But some Internet service providers, such as BT in the UK, supply modem/routers that won't work in bridge mode. There may be ways to get the modem/router to cooperate, but sometimes it is easier to put the second router into AP mode. But that has its own drawbacks:

Disabled Features on the Router when set to AP Mode | Answer | NETGEAR Support

[michaelkenward · Accepted solution]

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@Mahen485 wrote:

1. Modem to R7900 

2. wired connection from R7900 to Another Router ( in my case ASUS RT-N12 N300

Two routers on your network can cause headaches. For example, you can end up with local address problems. Among other things, the other router can misdirect addresses that the Netgear router usually handles, such as routerlogin.net or the usual IP address for a router, 192.168.1.1.

This explains some of the other drawbacks.

What is Double NAT? | Answer | NETGEAR Support

Unless you have specific reasons for using two routers – to create two separate networks for example – it is often easier to use just one router and then to set up the second router as a wifi access point. Netgear advises this, as does just about every site you will visit.

It may be possible to put the modem/router into modem only (bridge) mode and then to use the second device as the router. But some Internet service providers, such as BT in the UK, supply modem/routers that won't work in bridge mode. There may be ways to get the modem/router to cooperate, but sometimes it is easier to put the second router into AP mode. But that has its own drawbacks:

Disabled Features on the Router when set to AP Mode | Answer | NETGEAR Support