I've had a little struggle getting a Cisco SG 200-08 trunking with several vlans to a Cisco 3560G switch.
I'll quickly explain what was throwing me off for speed readers, but I will go in depth later on. On the proper Cisco switch the standard dot1q encapsulation and trunk mode needs to be used, this is similar to the SG 200-08 where the default 'trunk' port setting needs to be used. The only changes that need to be changed on the smart switch is to create the vlans before hand and put them as a member of the trunk port in the "Port VLAN Membership". This gave me strife because I am used to in 3560s' where all ports are allowed on a trunk from default where as they specifically need to be applied on the smart switches trunk ports.
How to setup a Cisco SG 200-08 with trunking and a non default management vlan:
- First off I would start with providing the SG 200-08 a access port on a vlan that has DHCP access so the web interface can be access for configuration.
- The device should now be access through the DHCP address, find this by looking up the server or doing an nmap scan and look for Cisco equipment.
- Now create the VLANs you need and name them under the "Create VLAN tab".
- The created VLAN/s now need to be added to the desired trunk port on the smart switch, this is done through "Port VLAN Membership". Simply select the trunk port, edit the details and select the VLAN that is to be allowed on the trunk, tick Membership and then click the arrow to move it in to the selected column.
- The VLANs that are needed on the trunk should now be showing on the Port VLAN Membership page.
- Access ports can now be configured, which is straight forward by changing the required ports to access ports and defining which VLAN is required, which is done through "Interface Settings". This won't actually work until we configure a trunk port on the other switch.
- Depending on your native vlan settings, you may have to change the management vlan setting before changing the port on the other switch to a trunk. Just a reminder make sure the management vlan is a member of the trunk port. This can be done through the "IPv4 Interface".
- The smart switch might be unconnectable if the management VLAN has been changed, therefore we need to enable a trunk port on the other switch to gain access again.
The switch should now be accessed through the IP entered in the management settings and trunking should be working correctly.
Just a note: A port setting called "General" can be used, which I believe will give you more options for Ingress Filtering and allowing tagging on that port, which would give you more options for VLAN compatible devices.