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m1978_295079's avatar
m1978_295079
Icon for Nimbostratus rankNimbostratus
Apr 05, 2017

SNAT and Self IP

What is the difference between SNAT and Self IP. Appears to me same. Could any please explain briefly.

 

1 Reply

  • nathe's avatar
    nathe
    Icon for Cirrocumulus rankCirrocumulus

    m1978,

     

    A Self IP is an IP address on the BIG-IP itself, is associated to a VLAN and an interface and can be a non-floating or floating one. Please see the following link: Manual Chapter: Self IP Addresses.

     

    A SNAT is used in address translation of source IP address. See this link: Overview of SNAT features.

     

    The link between the two is if you configure SNAT Automap on a virtual server it will translate the source address from being the original client IP address, to a self IP on the BIG-IP (in a HA environment the floating one is preferred). This is so return traffic goes via the BIG-IP and does not asymmetrically route directly to the client.

     

    Hope this helps,

     

    N