I'm currently trying to configure VLANs across some Cisco switches however the inter-switch communication appears to be getting blocked by STP.
I've broken the network topology down to it's most basic level, working with the gateway server, two switches and two client devices.
In our network topology, all clients exist on the same VLAN but are prevented from inter-client communication by wireless client isolation and switchport protection.
Bridges between sites (forming the trunks between switches) are managed on a separate VLAN to switch management.
Attached is an image of the network topology as it currently stands. This is working with non-cisco switches with no STP.
I'm wanting to change to Cisco switches and have STP enables so that I can put in place redundant links between second and third level switches.
When I use only one switch in the lab environment I can communicate with a client and their request is trunked and vlan tagged properly to the gateway.
With the second level switch disconnected, I can communicate with the bridging devices that connect the core switch to the second level switch but as soon as the second level switch is connected, the core switch blocks the port.
Both ports connecting the two switches are configured exactly the same with the same Native VLAN tag (1701), but still no success.
I'm running out of ideas to try, I'm certain it's something simple but can't seem to find it.