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Forum Discussion

Mig's avatar
Mig
Icon for Altostratus rankAltostratus
Jul 21, 2019

snat automap - floating ip choice

hello , for some of my Vservers automap is set and there is no direct floating IP on the egress vlan. bigip will choose the 2 choice : Floating self IP addresses on different VLANs   if multiple...
Nathan_F__F5_'s avatar
Nathan_F__F5_
Icon for Employee rankEmployee
Jul 22, 2019

Hi Mig,

 

Based on the list you provided I assume you are referencing the following article.

 

K7336: The SNAT Automap and self IP address selection

https://support.f5.com/csp/article/K7336

 

That article contains the following note:

 

"Note: When there are multiple self IP addresses on the egress VLAN, the BIG-IP system alternates the addresses using a load balancing selection similar to the Least Connections load balancing method."

 

Although that note specifies the "egress VLAN", I believe it also applies to the other VLANs as well. In short, if there were multiple self IP addresses on the other VLANs I would expect the BIG-IP to alternate between them as well.

 

-Nathan F

  • Mig's avatar
    Mig
    Icon for Altostratus rankAltostratus
    Jul 23, 2019

    Hi Nathan,

     

    thanks for your help , it' s a good explanation when multiple self IP addresses are configured .

     

    Mig.