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I'm not sure what I'm doing wrong and would therefore need some guidance. The goal is to be able to have a SSH connection between: PC -> C

On PC I have created a route

route add 192.168.50.0 mask 255.255.255.0 192.168.2.11

On A I have created a static route

configure
ip 
route 192.168.50.0/24 vlan2
end

After this, I can ping 192.168.50.1 and 50.3 but not 50.2. This is strange because pinging 50.3 can only go through 50.2 since B doesn't have any static routes.

Why can't I ping 50.2?

I have set all IPs to static. Enabled Routing in A. Enabled IP forwarding unicast in A. Disabled default gateway on A.

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  • My background in networking is very limited.
    – user51144
    Oct 19, 2018 at 19:09

1 Answer 1

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Switch C, as a member of the 192.168.50.0/24 subnet, requires a route back to 192.168.2.0/24 through 192.168.50.1. There is no route required for C's switching function (nor even any IP configuration at all) but for sending a reply to outside its subnet there is.

If you use static routing, all hosts have to get a static route to the other subnet or a default gateway.

Switch A doesn't need a static route because 192.168.50.0/24 is locally attached to it.

Additionally, your VLAN setup is messed up. C uses VLAN ID 1 for the same segment as A's and B's VLAN ID 2. While this doesn't matter as long as you don't tag between the switches (VLAN trunking), once you activate tagging it'll break the segment.

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  • I removed the static route on A; added a static route on C. It works. I literally jumped off my chair! Thank you!
    – user51144
    Oct 19, 2018 at 19:59
  • Just keep in mind that routes need to be consistent both ways at all times.
    – Zac67 ♦
    Oct 19, 2018 at 20:03

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