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

Forum Discussion

Nazir_52641's avatar
Aug 09, 2012

Use of LB::src_tag and LB::dst_tag

Hi All,

I want to know the use of LB::src_tag and LB::dst_tag.

 

 

 

 

 

We have following iRule for SIP persistence with this iRule what exactly does LB::src_tag and LB::dst_tag does.

 

 

 

when SIP_REQUEST {

 

if { [clientside] } {

 

LB::src_tag [SIP::call_id]

 

persist uie [SIP::call_id]

 

} else {

 

LB::dst_tag [SIP::call_id]

 

persist uie [SIP::call_id]

 

}

 

}

 

}

 

 

 

when SIP_RESPONSE {

 

if { [clientside] } {

 

LB::src_tag [SIP::call_id]

 

persist uie [SIP::call_id]

 

} else {

 

LB::dst_tag [SIP::call_id]

 

persist uie [SIP::call_id]

 

}

 

}

 

 

 

 

Thanks

 

Syed Nazir