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Pools

BIG-IP® Reference Guide 4-23

Simple persistence

Simple persistence tracks connections based only on the client IP address.

When a client requests a connection to a virtual server that supports simple

persistence, the BIG-IP checks to see if that client previously connected, and

if so, returns the client to the same node.

You may want to use SSL persistence and simple persistence together. In

situations where an SSL session ID times out, or where a returning client

does not provide a session ID, you may want the BIG-IP to direct the client

to the original node based on the client’s IP address. As long as the client’s

simple persistence record has not timed out, the BIG-IP can successfully

return the client to the appropriate node.

Persistence settings for pools apply to all protocols. When the persistence

timer is set to a value greater than 0, persistence is on. When the persistence

timer is set to 0, persistence is off.

To configure simple persistence for pools using the

Configuration utility

1. In the navigation pane, click Pools.

The Pools screen opens.

2. Select the pool for which you want to configure simple persistence.

The Pool Properties screen opens.

3. Click the Persistence tab.

The Persistence Properties screen opens.

4. In the Persistence Type section, click the Simple button.

Type the following information:

• Timeout (seconds)

Set the number of seconds for persistence on the pool. (This

option is not available if you are using rules.)

• Mask

Set the persistence mask for the pool. The persistence mask

determines persistence based on the portion of the client's IP

address that is specified in the mask.

5. Click the Apply button.

To configure simple persistence for pools from the

command line

You can use the bigpipe pool command with the modify keyword to set

simple persistence for a pool. Note that a timeout greater than 0 turns

persistence on, and a timeout of 0 turns persistence off.

b pool <pool_name> modify { \

persist_mode simple \

simple_timeout <timeout> \

simple_mask <ip_mask> }

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