I have been bashing my head trying to figure out what might have broke or why its not working, but let me explain the set up process.
We have 3 Panels for industrial machinery that daisy chain to a control panel that acts as a hub or unmanaged switch.Then that NIC connects to a L2 Switch
[Core Switch] ←→ [Access Switch Fa1/0/11] ←→(single Cable) [Industrial Control Panel] ←→ (Single Cable) [Industrial Panels (.30–.33)]
Switch Config
interface FastEthernet1/0/11
description HVAC
switchport access vlan 900
switchport mode access
spanning-tree portfast
end
SVI Config (Core Switch)
interface Vlan900
description HVAC-Panels
ip address 10.10.0.1 255.255.0.0
ip helper-address 10.0.1.101
In the core switch I can ping all 3 IP's. In the same switch that has the control panel connected I plugged my laptop with a static IP in the same subnet with an access port of 900 and could only ping 1 IP. I have tried trunk modes with native trunks as well and same results. I have cleared the CAM table and nothing. The weird thing is at one point it was working.
I did put a unmanged switch
[Laptop with same subnet] ←→ [Unmanaged Switch] ←→ [Industrial Control Panel (.30–.33)]
And this worked.
Also not sure if this info helps
show ip arp | include 10.10.0.
Internet 10.10.0.30 0 00a0.033a.a5eb ARPA Vlan900
Internet 10.10.0.31 237 001c.015d.2e71 ARPA Vlan900
Internet 10.10.0.32 45 001c.015d.2e6e ARPA Vlan900
Internet 10.10.0.33 236 001c.015d.2e65 ARPA Vlan900
but only 10.10.0.30 can be reached and based on the MAC addresses I would say that's the control panel and the others are the panels themselves.
Does anyone have any idea?
