Modem>Nighthawk Router>Layer 3 Cisco Switch>Layer 3 Cisco Switch>Laptop

[Zach1234]

I'm trying to set up multiple subnets on different layer 3 switches to the internet and I'm not able to get it working. The directly connected Layer 3 3560 cx Cisco Switch is able to ping the Netgear Nightawk RAX80 router interface and 8.8.8.8 as well. Every network is able to ping each other through OSPF, but when I ping the gateway of inside nat ip address of the nighthawk router from any host not directly connected, it doesn't work. I have a default route set up for that nighthawk router of 0.0.0.0 0.0.0.0 and the next hop address of 192.168.45.2. The directly connected interface with ip 192.168.45.1 is advertised to all the other networks and pingable from a laptop on the other layer 3 switch from a different subnet.  There are no acls configured. The NAT is done by the nighthawk router with a inside ip address of 192.168.45.2. When I login to the nighthawk router I can set up RIP which allows me to ping the 192.168.45.2 ip, from different subnets but it only works for a minute. It just seems like I can only ping the inside nat address and even then it's only through the first layer 3 switch itself.

[Georg Pauwen]

Hello,

post the full running configurations of both layer 3 switches, and indicate which port is directly connected to the Netgear.

[Asemmoqbel]

Dear Zach,

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@Zach1234 wrote:

  when I ping the gateway of inside nat ip address of the nighthawk router from any host not directly connected, it doesn't work.

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where this ip 192.168.45.2 is configured??

Do you mean you can't ping from hosts on different subnets to the GW: 192.168.45.2? if yes, what are the subnets and where the GW of these subnets is configured?

are you running ospf between Nightawk router and other L3 switches to advertise 192.168.45.2 to them??

[paul driver]

Hello

nighthawk router of 0.0.0.0 0.0.0.0 and the next hop address of 192.168.45.2
The NAT is done by the nighthawk router with a inside ip address of 192.168.45.2

You cannot have the same inside global and inside local address - is this a typo?

Can you post a topology diagram of your network please it will help in understanding your issue?