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36 Sun Dual 10GbE SFP+ PCIe ExpressModule User’s Guide • May 2010
VLANs are commonly used to separate groups of network users into manageable
broadcast domains, to create logical segmentation of workgroups, and to enforce
security policies among each logical segment. Each defined VLAN behaves as its
own separate network, with its traffic and broadcasts isolated from the others,
increasing the bandwidth efficiency within each logical group.
Although VLANs are commonly used to create individual broadcast domains or
separate IP subnets, it can be useful for a server to have a presence on more than one
VLAN simultaneously. Several Sun products support multiple VLANs on a per-port
or per-interface basis, allowing very flexible network configurations.
FIGURE 7-1
shows an example network that uses VLANs.
FIGURE 7-1
Example of Servers Supporting Multiple VLANs With Tagging Adapters
The example network has the following features:
The physical LAN network consists of a switch, two servers, and five clients. The
LAN is logically organized into three different VLANs, each representing a different
IP subnet.