Manual Chapter :
Preparing BIG-IP DNS for Static Persist Load Balancing for Transaction-Oriented
Traffic
Applies To:
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BIG-IP DNS
- 14.1.3, 14.1.2, 14.1.0
Preparing BIG-IP DNS for Static Persist Load Balancing for Transaction-Oriented
Traffic
About Static Persist load balancing
The Static Persist load balancing method uses the persist mask, with the source IP address of
the LDNS, in a deterministic algorithm to send requests to a specific pool member (virtual
server). Using this method, BIG-IP®
DNS sends DNS name resolution requests to the first available pool member
based on a hash algorithm that determines the order of the pool members. This algorithm orders
the pool members differently for each LDNS that is sending requests to BIG-IP DNS, taking into account
the Classless Inter-Domain Routing (CIDR) of the LDNS. As BIG-IP DNS distributes requests across all
pool members, requests from each LDNS (and thus, each client) are generally sent to the same pool
member. When the selected pool member becomes unavailable, BIG-IP DNS sends requests to another pool
member. When the original pool member becomes available again, BIG-IP DNS sends requests to that pool
member.
About configuring
BIG-IP DNS to provide Static Persist load balancing
You can configure BIG-IP DNS to
provide Static Persist load balancing of LDNS to virtual servers. With this configuration, BIG-IP
DNS guarantees that certain transactions are routed through a single transaction manager, such as
Local Traffic Manager, or another server array manager.
This is beneficial for transaction-oriented traffic, such as e-commerce shopping carts, online
trading, and online banking.
Configuring CIDR
options for Static Persist load balancing
The Static Persist load balancing method uses the
Classless Inter-Domain Routing (CIDR) system to identify which IP addresses require a
persistent connection to a virtual server. You can configure the range of IP addresses
by configuring the Static Persist CIDR setting for IPv4 and IPv6 addresses.
- On the Main tab, click.The GSLB Load Balancing configuration screen opens.
- For theStatic Persist CIDR (IPv4)setting, type the number of bits that determine the IP address range for IPv4 addresses.The default value is32.
- For theStatic Persist CIDR (IPv6)setting, type the number of bits that determine the IP address range for IPv6 addresses.The default value is128.
- ClickUpdate.
You can now configure a pool for Static Persist
load balancing.