1

Hello, everyone! Had a question about routing traffic from the topology in this picture (i know it seems goofy). I have tried making this work several ways, I currently have a static route set on the right router for 192.168.16.0/24 to use 10.99.99.97 next hop. My understanding of networking makes me think that traffic originating from the 10.10.3.0/24 network, using the 10.10.3.1 gateway should be routed through 10.99.99.98 interface. And traffic from the 192.168.16.0/24 network should never touch the right router and be sent out the 10.10.3.175 interface.

Am I missing something here? How would you guys go about setting this up?

5 Spice ups
2

Hey there. What routing protocol are you using here? Or is it all just static? Also, what’s the default-gateway for that VLAN (10.10.3.0) on the switch?

3

You can’t have two gateways in a subnet (10.10.3.1 and 175) and think it will just work.

4

Looks like that’s L2 with 10.10.3.1 and 10.10.3.175 as gateways, crazy and won’t work!

5

I don’t think it will “just work” we have things setup and running the way we want. I’ve actually worked around this issue by creating routes on the clients for vlan 211 to use 10.10.3.175 as opposed to the default gateway our DHCP server is handing out(10.10.3.1). I was just trying to understand conceptually at this point why traffic isn’t passing both ways. Here is my understanding… Traffic leaving the 10.10.3.x network destined to the 192.168.16.0/24 net using gateway 10.10.3.1, should be routed through the 10.99.99.96/30 network(Because I created a static route on the right router, telling it to do that). And when it gets to the left router, it should see that 192.168.16.x is directly connected. Returning traffic using the 192.168.16.1 gateway should see that 10.10.3.x is directly connected and exit the 10.10.3.175 gateway. This is my logic, why would this not work?

6

Currently I am just using the one static route on the right router. Almost all clients on vlan1 (10.10.3.x) are using 10.10.3.1 as their default-gateway. I know it’s a weird top, but it has to be setup this way temporarily. I was just trying to sharpen up my skills and understand why this isn’t working

7

I discovered an error in my config, rookie mistake! Thanks for the responses.