SNAT Automap, INET Port Exhaustion, and Self-IPs

Hi SMP,

 

 

On a unit in a redundant pair, the static (non-floating) self IPs cannot be used to source traffic. If you want to avoid the inet port exhaustion, you can add more floating self IPs or configure a SNAT pool per virtual server. The latter would help if you use the same pool member IP:ports on multiple virtual servers that you have SNAT automap enabled for.

 

 

With multiple SNAT addresses TMM will round robin through them. This can cause problems with apps that track the source IP address over a session. If you need to ensure the source IP stays the same across multiple connections, you can use an iRule like these to do so:

 

 

http://devcentral.f5.com/wiki/default.aspx/iRules/snat_pool_persistence.html

 

http://devcentral.f5.com/wiki/default.aspx/iRules/Exchange2010_SNATPool_Persist.html

 

 

Aaron