
Pools
BIG-IP® Reference Guide 4-39
Using format strings (expansion characters)
To allow HTTP redirection to be fully configurable with respect to target
URI, the following format strings are available. These strings can be used
within both pools and rules. (For more information on using HTTP
redirection format strings within rules, see Pool selection based on HTTP
header data, on page 4-56.)
Table 4.7 lists and defines the format strings that you can use to specify
HTTP redirection.
Table 4.7 Format strings for HTTP redirection
An example of a fallback host string is https://%h/sample.html. In this
string, specifying https as the protocol identifier causes the traffic to be
redirected to that protocol instead of the standard http protocol. Also, the
string sample.html causes the traffic to be redirected to that URI instead of
to the standard URI specified in the HTTP header, which would normally be
represented in the fallback string as %u.
Format String Description
%h host name, as obtained from the Host: header of the
client
%p Port, from the virtual server listening port
%u URI path, as obtained from a GET/POST request
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