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User Guide NetXtreme II
January 2010
Broadcom Corporation
Document ENGSRVT52-CDUM100-R Virtual LANs: Broadcom NetXtreme II™ Network Adapter User Guide Page 63
Virtual LANs: Broadcom NetXtreme II™ Network
Adapter User Guide
• VLAN Overview
• Adding VLANs to Teams
VLAN OVERVIEW
Virtual LANs (VLANs) allow you to split your physical LAN into logical parts, to create logical segmentation of workgroups,
and to enforce security policies for each logical segment. Each defined VLAN behaves as its own separate network with its
traffic and broadcasts isolated from the others, increasing bandwidth efficiency within each logical group. Up to 64 VLANs
(63 tagged and 1 untagged) can be defined for each Broadcom adapter on your server, depending on the amount of memory
available in your system.
VLANs can be added to a team to allow multiple VLANs with different VLAN IDs. A virtual adapter is created for each VLAN
added.
Although VLANs are commonly used to create individual broadcast domains and/or separate IP subnets, it is sometimes
useful for a server to have a presence on more than one VLAN simultaneously. Broadcom adapters support multiple VLANs
on a per-port or per-team basis, allowing very flexible network configurations.
Figure 1: Example of Servers Supporting Multiple VLANs with Tagging