HP VPN Firewall Appliances High Availability Configuration Guide

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Item Descri
p
tion
Scheduler
Select an algorithm that a real service group uses to distribute services and
traffic:
• Round Robin—Assigns new connections to each real service in turn.
• Weighted Round Robin—Assigns new connections to real services based
on the weights of real services. A higher weight indicates more new
connections will be assigned.
• Least Connections—New connections are always assigned to the real
service with the fewest number of active connections.
• Weighted Least Connections—New connections are always assigned to
the real service with the fewest number of weighted active connections
(the number of active connections/weight).
• Random—Assigns new connections to real services randomly.
• Weighted Random—Assigns new connections randomly to real services
based on their weights. A higher weight indicates more new connections
will be assigned.
• Source Address Hashing—Assigns a new connection to a specific real
service based on the source address of the connection. This algorithm
make sure new connections with the same source address can be
assigned to the same real service.
• Source Address Port Hashing—Assigns a new connection to a specific
real service based on the source address and port of the connection. This
algorithm makes sure new connections with the same source address and
port can be assigned to the same real service.
• Destination Address Hashing—Assigns a new connection to a specific
real service based on the destination address of the connection.
• UDP Packet Load Hash—Assigns a new connection to a specific real
service based on the value of a specific field in the UDP packet payload.
This algorithm can make sure that new connections with the same UDP
packet payload can be assigned to the same real service.
• Local Priority—Available real services with the same priority are assigned
to a subgroup. The real services are selected by subgroup according to
the specified minimum active real service number, and round robin
scheduling is performed among the selected real services. Suppose a real
service group has two real services with priority 10 and three real services
with priority 5, and all real services are available. If the minimum active
real service number is 2, only two real services with priority 10 participate
in scheduling. If the minimum active real service number is 3, the real
services with both priority 10 and 5 participate in scheduling.
IMPORTANT:
Destination address hashing is applicable to firewall load balancing mode and
other algorithms are applicable to server load balancing.
Health Monitoring Method
Select a health monitoring method that a real service group uses to monitor
its real services.
IMPORTANT:
The health monitoring method specified for the real service group takes effect
for a real service that has the same health monitoring method specified.
Otherwise, the health monitoring method specified for the real service takes
effect.