User guide

17-14 E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
S
ERVER
L
OAD
B
ALANCING
(SLB)
where the number of connections that each machine receives over time is proportionate
to the ratio weight you defined for each machine.
The ratio method distributes new connections across server ports in proportion to a
user-defined ratio. For example, if your array contained one new, high-speed server and
two older servers, you could set the ratio so that the high-speed server receives twice as
many connections as either of the two older servers.
To configure ratio, use this command:
config slb pool <poolname> lb-method ratio
R
ATIO
W
EIGHT
The ratio weight is the proportion of total connections that the node address should
receive. The default ratio weight for a given node address is 1. If all node addresses use
this default weight, the connections are distributed equally among the nodes. A ratio
weight of 2 would result in twice as much traffic as a ratio weight of 1.
To configure a ratio weight, use this command:
config slb pool <poolname> add <ipaddress>:<L4Port> ratio {<ratio>}
L
EAST
C
ONNECTIONS
Least connections method is relatively simple in that the switch passes a new
connection to the node having the least number of active sessions. The number of active
sessions includes only those sessions occurring within the same VIP. Least connections
works best in environments where the servers or other equipment you are load
balancing have similar capabilities.
To configure least connections, use this command:
config slb pool <poolname> lb-method least-connections
P
RIORITY
Priority mode is a variant of round-robin designed to provide redundant “standby”
nodes within a pool. When you add a node to a pool, you can assign a priority level.
Priority numbers range from 1 - 65535, with the highest number indicating the highest
priority.