Connecting Cisco to Extreme via Transit VLAN

Hello reddit,

We have an Extreme x670_G2 switch running at a client, which we wish to manage remotely. For this we use a transit VLAN on a single port. The IP of the transit vlan (Cisco side) is configured as default gateway within the Extreme.

The issue: I am succesfully connecting to the switch remotely via SSH, and from inside the cli we can access the devices on the VLANs. But, from the Cisco network we cannot access the devices directly (to for example, use RDP).

We do not have access to the Cisco switches, nor do we have the configuration.

Do there need to be static routes defined from the Cisco network to each devices to access those? If so, is it also an option to change the transit VLAN subnet mask to 255.255.254.0?

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The transit VLAN is configured as following:

Extreme transit: 192.168.11.193 255.255.255.192

Cisco transit: 192.168.11.254 255.255.255.192

The default gateway on the Extreme is set to 192.168.11.254, ipforwarding is enabled on all VLANs.

An example device we want to access: 192.168.10.5

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A quick summary from the Cisco side: We can access 192.168.11.254, 192.168.11.193, but not 192.168.10.5

From the Extreme side: We can access all of the above IP's.