Specifications
Load Sharing
BlueSecure™ Controller Setup and Administration Guide 14-17
Load Sharing
Use the BSC load sharing feature in environments where many wireless clients log onto
the network simultaneously via a limited number of access points.The load sharing feature
should be used when the collective traffic load from a group of wireless and wired clients
exceeds the performance limits of a single BSC.
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Note that Secure Mobility roaming is supported on VLANs within a Load Sharing Group,
but not from a BSC outside of the Load Sharing Group.
The information on Load Sharing in the section is organized as follows:
• “Typical Configuration” on page 14-17.
• “Network Requirements” on page 14-18.
• “Configuring BSC Load Sharing (Single Subnet, NAT Enabled)” on page 14-18.
• “Configuring BSC Load Sharing (No NAT)” on page 14-22.
• “Verifying Your Load Sharing Configuration” on page 14-23.
Typical Configuration
Bluesocket BSCs that share user traffic are members of a load sharing group (LSG).You
must first configure the Replication feature for all BSCs that are to have membership in an
LSG. All BSCs in the local Replication setup are eligible for membership in a load sharing
group, however a given load sharing group may have a maximum of six members.
The configured Replication Master will act as the Load Sharing Master in an LSG. The
Load Sharing Master manages configuration of the LSG, controls all broadcast traffic
through the LSG, runs a DHCP server, assigns virtual IP addresses to the managed and
protected interfaces of LSG members, and serves as the central point-of-configuration for
the BSC administrator. The following figure illustrates a typical load sharing
configuration.
Figure 14-16: A Typical Load Sharing Configuration
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Managed Side Protected Side
Switch
Load Sharing
Master
Load Sharing
Nodes
Protected
Corporate/Campus
Network
Internet
Load Sharing
Group
Firewall
Switch for
all BSC Failover Port Connections
Keep Alive and State Information is
Shared over BSC Failover Ports
BSC1
BSC2
BSC3
Switch