Packets are dropped when setting small receive TCP socket size SO_RCVBUF=3096 in Red Hat Enterprise Linux 6.3

Solution Verified - Updated -

Issue

When setting a socket's receive buffer low to SO_RCVBUF=3096, packets are lost and buffers overflow in RHEL 6.3, though this worked fine in RHEL 6.2.

This issue only exists when RHEL 6.3 or later communicates with Solaris. RHEL 6.x <-> RHEL 6.x seems to not exhibit the errors.

Environment

Red Hat Enterprise Linux (RHEL) 6.3
Red Hat Enterprise Linux (RHEL) 6.4
Red Hat Enterprise Linux (RHEL) 6.5

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