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Help to connect Sonicwall between two cisco routers

I have two cisco routers and I want to put sonicwall between them. My plan is below....

Cisco router 1921

1. Two VWIC3-2MFT-E1/T1 cards to bundle 4xT1.

2. Set int G0/0 ip address 10.10.0.2/24

3. Do ip route to routing with Cisco router 2901 and ISP

Cisco router 2901x

1. Set int G0/1 ip address 10.10.0.4/24 to connect Cisco router 1921

2. Set int G0/0 for VLAN Connecting port and connect to Cisco Switch with VLAN setting up

     G0/0.1     10.10.1.1/24

     G0/0.2     10.10.2.1/24    

     G0/0.3     10.10.3.1/24 native

     G0/0.4     10.10.4.1/24

3. Do ip route to routing with Cisco router 1921

4. Do router EIGRP to routing all VLANs

Now, I want to put Sonicwall TZ215 between two Cisco routers for firewall.

1. Set WAN X1 ip address 10.10.0.3/24 ; GW 10.10.0.2 to connect to Cisco router 1921 int G0/0

2. Set LAN X0 for Transparent Mode, so ip address 10.10.0.3/24 and ip range 10.10.0.5-10.10.0.254. Connect to Cisco router 2901x int G0/1

After I put Sonicwall between two routers, the internet is down. Therefore, can anyone help or teach me how to do it?

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