Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

KT's avatar
KT
Icon for Nimbostratus rankNimbostratus
Dec 16, 2021

Need help to understand the iRule

switch -glob [string tolower [HTTP::uri]] {                                               "/online*" { set is_redirected "legacy" }                                               } switch $is_redi...
application delivery
irules
log
Niels_van_Sluis's avatar
Niels_van_Sluis
Icon for MVP rankMVP
Dec 17, 2021

First it checks the URI. If it is starting with "/online*" the variable 'is_redirected' is set to "legacy".

Next, it's checking if the "is_redirected" variable is set to "legacy". If it matches "legacy" it will check if pool member 1.1.1.1:80 is up. If it is up, it will make a new load balancing deciscion and set's the selected pool member to 10.101.83.80. If 1.1.1.1:80 is down, it will make a new load balancing deciscion and set's the selected pool member to 2.2.2.2:80.