If you have different switches with VLANs and want to connect them together you have to set the egress state of the ports where the switches are connect together:
example: Switch A is connected with Switch B (let's say the uplink port between both is ge.1.1 then you have to:
- create the VLAN : set vlan create 20
- configure Data Host Port into vlan 20: set host vlan 20
- configure ge.1.1 to forward vlan 20 traffic tagged: set vlan egress 20 ge.1.1 tagged
- configure the ip address on both switches: set ip address 10.0.0.1 mask 255.0.0.0 gateway 10.0.0.254
At the cisco - I'm not sure - but I guess you have to set the port in trunk mode and allow vlan 20.
If you configure two Enterasys switches like the example and connect them together it should be possible to ping from one to the other.
Best regards,
Axel