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Chapter 4: Configuring the High-Level Network

4-158

The monitors themselves must be configured with the grouping in mind. For

example, if the dest values of both monitors were set to *:*, then both

monitor instances would try to ping the default port 80. This would both

defeat the purpose of the HTTPS monitor and cause an automatic failure,

since two monitors would be trying to ping the same address and port

simultaneously.

Instead, monitor my_http should be given a dest value of *:* and monitor

my_https should be given a dest value of *:443. This causes only the

my_http monitor instances to default to 80. The my_https monitor

instances are forced to the explicit port 443, avoiding a conflict as shown in

Figure 4.75.

Using wildcards to specify addresses

The wildcard * can be used to specify addresses. A wildcard address

association creates instances of the monitor for all nodes load balanced by

the BIG-IP:

b node * monitor use my_tcp_echo:

A wildcard with a port association creates instances of the monitor for every

node configured to service that port:

b node *:80 monitor use my_http:

To associate a monitor using the Configuration utility

1. In the navigation pane, click Monitors.

The Network Monitors screen opens.

2. Click one of three tabs:

• If you are associating the monitor with a node (the IP address

plus the port) click the Node Associations tab.

• If you are associating the monitor with a node address only (the

IP address minus the port), click the Node Address Associations

tab.

• If you are associating the monitor with a port only (the port minus

the IP address), click the Port Associations tab.

3. Regardless of the selection you made in step 2, a dialog box appears

with the boxes Choose Monitor and Monitor Rule. Type the

monitor name or select one from the list.

MONITOR my_http and https_443

+- NODE 11.12.11.20:80 UP

| |

| +- my_http

| | 11.12.11.20:80 up enabled

| |

| +- https_443

11.12.11.20:443 up enabled

Figure 4.75 Use of a monitor rule

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