Alteon Application Switch Operating System Application Guide
Server Load Balancing
Document ID: RDWR-ALOS-V2900_AG1302
189
Example
Enable slow start for Real Server Group 1 with a setting of 10 seconds
Example
Disable slow start for Real Server Group 1
Extending Server Load Balancing Topologies
For standard SLB, all client-to-server requests to a particular virtual server and all related
server-to-client responses must pass through the same Alteon. In complex network topologies,
routers and other devices can create alternate paths around Alteon managing SLB functions. Under
such conditions, the Alteon provides the following solutions:
•
Virtual Matrix Architecture, page 189
•
Client Network Address Translation (Proxy IP), page 190
•
•
Direct Server Return, page 197
•
•
Virtual Matrix Architecture
Virtual Matrix Architecture (VMA) is a hybrid architecture that takes full advantage of the distributed
processing capability in Alteon. With VMA, Alteon makes optimal use of system resources by
distributing the workload to multiple processors, thereby improving performance and increasing
session capacity. VMA also removes the topology constraints introduced by using Direct Access Mode
(DAM). By default, VMA is enabled (
/cfg/slb/adv/matrix
).
To improve the distribution, there are two VMA configurable options, as shown in Table 22:
Note:
Radware recommends not changing VMA option while Alteon is in operation, as that may
result in temporary disconnection of clients.
>> Main# /cfg/slb/group 1/slowstr 10
>> Main# /cfg/slb/group 1/slowstr 0
Table 22: VMA Configurable Options
Option
Description
VMA with source port:
>> /cfg/slb/adv/vmasport
Source IP and source port are used to determine the
processor.
VMA with destination IP:
>> /cfg/slb/adv/vmadip
Source IP and destination IP are used to determine the
processor. Both options can be enabled together, where
source IP, source port, and destination IP are used to
determine the processor.
