Manual Chapter :
About Hybrid or Late Binding
Applies To:
Show Versions
BIG-IP LTM
- 21.0.0, 17.5.1, 17.5.0, 17.1.3, 17.1.2, 17.1.1, 17.1.0, 17.0.0, 16.1.6, 16.1.5, 16.1.4, 16.1.3, 16.1.2, 16.1.1, 16.1.0, 16.0.1, 16.0.0, 15.1.10, 15.1.9, 15.1.8, 15.1.7, 15.1.6, 15.1.5, 15.1.4, 15.1.3, 15.1.2, 15.1.0, 15.0.1, 15.0.0, 14.1.5, 14.1.4, 14.1.3, 14.1.2, 14.1.0, 14.0.1, 14.0.0
About Hybrid or Late Binding
The Hybrid or Late Binding mode combines layer 7 parsing at the initial connection time to make an intelligent pool member selection based on the FIX SenderCompID field and then accelerates the flow at layer 4, providing dedicated low latency during the rest of the connection.
With the Late Binding feature enabled, an iRule can examine the FIX logon packet which establishes the connection, and choose a server pool based on the packet’s contents. The iRule finishes by sending the connection down to the ePVA hardware, which processes the stream at low latency.
The only TCP options available to the client and server are MSS, except Selective ACK and Time Stamp. The BIG-IP system ignores all other options because it must enable SYN cookies on the client-side interface and because the ePVA hardware does not process any of those options. For example, the BIG-IP system ignores the Window Scaling option as soon as the flow has been released to the ePVA hardware.
Secure Sockets Layer (SSL) is not supported by a virtual server that uses Late Binding.
