This is a first time try for me.
I'm trying to connect the main switch here (3560) to two 2950s via fiber on SFP ports. The connection lights are green at both ends (3560 and 2950 ends) but I can't ping.
The 3560 switch has 3 VLANS configured: 10, 12 and 15. I'm only dealing with VLAN 10 which has a subnet of 172.16.1.* and an IP of 172.16.1.1.
I tried to assign SFP ports on the 3560 49 and 50 to be considered part of VLAN 10 but when I look at the port status page it says they are "trunk".
The one 2950 I want to communicate to is IP address 172.16.1.20. The 2950 does not have VLAN configured - but I thought I wouldn't need to do that. There's a device connected to the 2950 with an IP address of 172.16.1.21 which we need to communicate with.