Cisco 300SF Switch Configuration Problem with NAT Router

[t.marksteiner1]

hi,

i want to build a small network with following structure:

• Internet Gateway
  • NAT Router (Router 1)
    • Layer 3 Switch (Switch 1)
      • vlan 1 to vlan 5
    • Layer 2 Switch (Switch 2)

So for testing, i replaced the internet gateway with a normal NAT router (router 0) with ip 192.168.0.254.

detail structure of vlans:

• vlan 5
  • Router 1 with ip 192.168.5.254
  • Layer 3 Switch with ip 192.168.5.253
• vlan 1
  • Switch Layer (Switch 2) with ip 192.168.1.252
  • Layer 3 Switch with ip 192.168.1.253

structure of 192.168.0.0:

• NAT-Router (Router 0) 192.168.0.254
• NAT-Router (Router 1) 192.168.0.240

I added a static route for 192.168.0.0 to Switch 1 with next hop 192.168.5.254 and a static route to Router 1 for 192.168.1.0 with next hop 192.168.5.253.

Now i tried following pings:

• Router-0 192.168.0.254 from Switch 1 with vlan 5 interface (192.168.5.253) => works
• Router-1 192.168.5.254 from Switch 1 with vlan 1 interface (192.168.1.253). => works
• Router-1 192.168.0.240 from Switch 1 with vlan 1 interface (192.168.1.253) => works
• Router-0 192.168.0.254 from Switch 1 with vlan 1 interface (192.168.1.253) => DOES NOT WORK

Router 1 is connected to Switch 1 by access port for vlan 5.

What is wrong with my configuration?

How can i analyze the network problem?

I hope anyone can help me.

[Aleksandra Dargiel]

Hi,

It looks to me like your L2 switch have  no default gateway configured? Have you done any ping test from the L2 switch?

Regards,

Aleksandra

[t.marksteiner1 · Accepted solution]

Thanks for your reply and sorry for my late answer.

I found my fault. I thought that every NAT router is enable to provide NAT feature for multiple subnets, but this is not correct.

So i have to replace my Router 1.

Regards,

Thomas