Communication broken when Acceleration is enabled in an asymmetric cluster

Summary

This issue is caused by how the cluster pairs communicate with one another and is resolved by a firmware upgrade

Overview

This issue occurs when the SYN and SYN-ACK packets follow asymmetric paths through the Exindas in a cluster. With the SYN passing through one Exinda and the SYN-ACK passing through the other.

Cause

This issue is caused by the cluster partners not communicating details regarding the accelerated flow correctly.

When attempting to establish an accelerated conversation the sequence numbers are changed after the Exinda. The issue occured when the clustered appliances were not sharing information about these communications between each other until the connection was established.

Resolution

The issue was resolved under D-02189 in 6.4.3 Update 2.