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Nodes

BIG-IP® Reference Guide 4 - 117

To mark a node up, use the node command with the up option:

b node 192.168.21.1 up

To mark a particular service down, specify the node command with a node

address and port, and the down option. (Note that marking a port down

prevents the port from accepting new connections. Existing connections are

allowed to complete.)

b node 192.168.21.1:80 down

To mark a particular port up, use the node command with up option:

b node 192.168.21.1:80 up

To set connection limits for nodes

Use the following command to set the maximum number of concurrent

connections allowed on a node:

b node <node_ip>[:<service>][...<node_ip>[:<service>]] limit <max conn>

Note that to remove a connection limit, set the <max conn> variable to 0

(zero). For example:

b node 192.168.21.1:80 limit 0

The following example shows how to set the maximum number of

concurrent connections to 100 for a list of nodes:

b node 192.168.21.1 192.168.21.1 192.168.21.1 limit 100

To remove a connection limit, set the <max conn> variable to 0 (zero).

To associate a health monitor with a node

Use the following command to associate a health monitor with a node:

node <node> monitor use <monitor>

A monitor can be placed on multiple nodes and a node can have multiple

monitors placed on it. To place a monitor on multiple nodes:

node <node_list> monitor use <monitor>

To place multiple monitors on a node:

node <node> monitor use <monitor1> and <monitor2>...

For more information on using the node command with health monitors,

refer to Health monitors, on page 4-137.

To display status of all nodes

When you issue the node show command, the BIG-IP displays the node

status (up or down, or unchecked), and a node summary of connection

statistics, which is further broken down to show statistics by port. To display

the status of a node from the command line, type the following command:

b node show

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