Cisco Systems 78-11741-02 Wireless Office Headset User Manual


 
Configuring Server Load Balancing
IOS SLB Configuration Task List
IPC-140
Cisco IOS IP Configuration Guide
Does not support coordinating server load-balancing statistics among different IOS SLB instances
for backup capability.
Supports FTP only in dispatched mode.
Does not support load balancing of flows between clients and real servers that are on the same LAN
VLAN.
Does not support IOS SLB and Cisco Applications and Services Architecture (CASA) configured
with the same virtual IP address, even if they are for different services.
Supports Cisco IOS NAT in directed mode with no hardware data packet acceleration. (Hardware
data packet acceleration is performed by the Policy Feature Card (PFC), and in directed mode the
data packets are handled by the Multilayer Switched Feature Card (MSFC), not the PFC.)
Catalyst 6000 family switch restrictions are as follows:
Requires the MSFC and the PFC.
Requires that the Multilayer Switching (MLS) flow mode be set to full. For more information about
how to set the MLS flow, refer to the “Configuring IP Multilayer Switching” section in the Catalyst
6000 Family MSFC (12.0) & PFC Configuration Guide, Release 5.4.
When IOS SLB is operating in dispatched mode, real servers must be Layer 2-adjacent to the
IOS SLB switch (that is, not beyond an additional router), with hardware data packet acceleration
performed by the PFC. All real servers that can be reached by a single IOS SLB device must be on
the same VLAN. The loopback address must be configured in the real servers.
When IOS SLB is operating in directed mode with server NAT, real servers need not be Layer
2-adjacent to the IOS SLB switch. This allows for more flexible network design, because servers
can be placed several Layer 3 hops away from the IOS SLB switch.
Requires that all real servers that can be reached by a single IOS SLB device must be on the same
VLAN. The loopback address must be configured in the real servers.
Supports NativeIOS only and C6sup-is-mz images.
Cisco 7200 series restrictions are as follows:
In dispatched mode, the servers must be Layer 2-adjacent or tag-switched. In directed mode, the
servers can be one or more hops away.
Supports Cisco IOS NAT in directed mode with no hardware data packet acceleration. Provides no
hardware acceleration for the IOS SLB function for either dispatched mode or directed mode.
Supports C7200-is-mz images.
IOS SLB Configuration Task List
Configuring IOS SLB involves identifying server farms, configuring groups of real servers in server farms,
and configuring the virtual servers that represent the real servers to the clients. To configure the IOS SLB
feature, perform the tasks described in the following sections in the order listed. Some tasks are required;
others are optional.
Specifying a Server Farm (Required)
Specifying a Load-Balancing Algorithm (Optional)
Specifying a Bind ID (Optional)
Specifying a Real Server (Required)
Configuring Real Server Attributes (Optional)