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100

101

Health monitors

BIG-IP® Reference Guide 4 - 141

Both transparent and reverse modes are options. (For more information

about transparent and reverse modes, refer to Using transparent and reverse

modes, on page 4-150.)

Using http

The http template is for HyperText Transfer Protocol. Like a tcp monitor,

an http monitor attempts to receive specific content from a web page, and

unlike a tcp monitor, sends a user name and password. The check is

successful when the content matches the recv expression. An http monitor

uses a send string, a recv expression, username, password, and optional

get, url, transparent and reverse statements. (If there is no password

security, use blank strings [""] for username and password.) The optional

get statement replaces the send statement, automatically filling in the string

"GET". Thus the following two statements are equivalent:

send "GET/"

get "/"

The optional url statement takes the HTTP URL as a value and

automatically fills in the dest value with the address the URL resolves to.

(For more information about transparent and reverse modes, refer to Using

transparent and reverse modes, on page 4-150.) Both transparent and

reverse modes are also options. (For more information about the get and url

statements, refer to Using send, receive, url, and get statements, on page

4-150.)

monitor tcp {

#type tcp

interval 5

timeout 16

dest *:*

send ""

recv ""

//reverse

//transparent

}

Figure 4.56 The tcp monitor template

monitor http {

#type http

interval 5

timeout 16

dest *:*

send "GET /"

recv ""

username ""

password ""

//get

//url

//reverse

//transparent

}

Figure 4.57 The http monitor template

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