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

Forum Discussion

Edward_Gastón_S's avatar
Edward_Gastón_S
Icon for Nimbostratus rankNimbostratus
Jun 17, 2018

SNAT POOL

Hello Community,   One question,   I have configuration F5, with traffic SMTP Outgoing with virtual server type performance layer 4 with irule SNAT where i have some SNAT List (IP Address Serve...
application delivery
LTM
snat
youssef1's avatar
youssef1
Icon for Cumulonimbus rankCumulonimbus
Jun 18, 2018

Hi Edward,

 

As explain in this KB link text. The BIG-IP system load balances SNAT pool connections between members using the least connections algorithm.

 

So in your case, suppose you have this 4 memebers in you snat pool:

 

  • 192.168.1.1(A) --> 6000 connections
  • 192.168.1.2(B) --> 6001 connections
  • 192.168.1.3(C) --> 6002 connections
  • 192.168.1.4(D) --> 6003 connections

F5 will LB Outgoing smtp connection using least connections. So int the example that I showed you above, the next IP that will be use is A.

 

Hope it's clear, let me know if you need more details.

 

Regards