Configuring Server Load Balancing
Configuring Server Load Balancing on a Switch
OmniSwitch AOS Release 7 Network Configuration Guide
June 2013
page 23-13
-> policy condition cond1 source port 1/24
The condition created in the above example, “cond1”, uses the source port value to classify traffic. When
this same condition is associated with an SLB cluster, client requests received on the specified source port
are then sent to a server that is a member of the associated cluster.
The following QoS policy conditions are supported individually and in combination with each other when
used to configure SLB condition clusters:
See
Chapter 25, “Configuring QoS,”
for more information about configuring and displaying QoS policy
conditions.
Automatic Configuration of SLB Policy Rules
When you configure an SLB cluster, a Quality of Service (QoS) policy condition, action, and rule are
automatically configured for it. In addition, the switch software automatically names the condition, action,
and rule by adding the prefix
SLB-cond-
,
SLB-act-
, and
SLB-rule-
, respectively, to the name of the SLB
cluster for each name.
For example, if you configured an SLB cluster called “Web_Server” a policy condition called “SLB-cond-
Web_Server,” a policy action called “SLB-act-Web_Server,” and a policy rule called “SLB-rule-
Web_Server” would be created.
Note that the user-configured policy condition associated with an SLB cluster is the condition used for the
automatically configured SLB policy rule. For example, if you configured an SLB cluster called
“Web_Server2” and associated it with the “cond1” condition, a policy rule called “SLB-rul-Web-Server2”
would be created with the “cond1” condition and the “SLB-act-Web_Server2” action.
You can display QoS policy rules with the
command. To use this command, enter
show
policy rule
followed by the name of the rule. For example, the following commands display the policy
rule called “SLB-rul-Web_Server” and the policy rule called “SLB-rul-Web_Server2”:
-> show policy rule SLB-rul-Web-Server
Rule name = SLB-rul-Web-Server,
From = api,
Precedence = 65000,
Condition name = SLB-cnd-Web-Server,
Action name = SLB-act-Web-Server
You can also use the
command to display policy conditions and the
command to display policy actions. See
Chapter 25, “Configuring QoS,”
for more information on
configuring and displaying QoS policies.
QoS Policy Condition Keywords
source vlan
source port
destination port
source port group
destination port group
source mac
destination mac
source mac group
destination mac group
tos
dscp
802.1p
source ip address
destination ip address
source network group
destination network group
service
service group
ethertype
protocol
source tcp-port
destination tcp-port
source udp-port
destination udp-port
icmp type
icmp code
tcp flags