The Main Server is a heavily used server that needs to be accessed from all VLANs and IP subnets. The server has a Sun x8 Express Dual 10 Gigabit Ethernet Fiber XFP Low Profile Adapter installed. All three IP subnets are accessed by means of the single physical adapter interface. The server is attached to one of the switch’s Gigabit Ethernet ports, which is configured for VLANs 1, 2, and 3. Both the adapter and the connected switch port have tagging turned on. The tagging VLAN capabilities of both devices enable the sever to communicate on all three IP subnets in this network, yet continue to maintain broadcast separation among the three subnets. The following list describes the components of this network:
■The Accounting Server is available to VLAN 3 only. It is isolated from all traffic on VLANs 1 and 2. The switch port connected to the server has tagging turned off.
■Clients 1 and 2 are attached to a shared media hub that is then connected to the switch. They belong to VLAN 2 only, and are logically in the same IP subnet as the Main Server and Client 5. The switch port connected to this segment has tagging turned off.
■Client 3 is a member of VLAN 1, and can communicate only with the Main Server and Client 5. Tagging is not enabled on Client 3’s switch port.
■Client 4 is a member of VLAN 3, and can communicate only with the servers. Tagging is not enabled on Client 4’s switch port.
■Client 5 is a member of both VLANs 1 and 2, and has a Sun x8 Express Dual 10 Gigabit Ethernet Fiber XFP Low Profile Adapter installed. It is connected to switch port 10. Both the adapter and the switch port are configured for VLANs 1 and 2 and have tagging enabled.
VLAN tagging is only required to be enabled on switch ports that create trunk links to other
Configuring VLANs in a Solaris Environment
VLANs can be created according to various criteria, but each VLAN must be assigned a VLAN tag or VLAN ID (VID). The VID is a
Chapter 8 Configuring VLANs 69
