Symptoms

IPv6 full hardware acceleration with ePVA feature is disabled. An issue was uncovered in the 2.3.x bitstream that results in Flow Status Updates (FSUs) due to a collision eviction being corrupted in certain cases. This occurs when the flow cache entry being evicted and the incoming snoop are different sizes. In the 2.3.x bitstream design, the IPv4 and SYN VIP flow cache entries and snoops are the same size, and the IPv6 flow cache entries and snoops are larger than IPv4/SYN VIP. There are no FSU-related issues when a cache entry is evicted due to a collision by a same size snoop, and there are no issues when an eviction is explicitly requested by software via the evict opcode.

Impact

Cannot enable full acceleration for an IPv6 VIP.

Conditions

VIPRION B2250 blade with ePVA acceleration, IPv6.

Workaround

None.

Fix Information

ePVA IPv6 feature is now available in this release.

Behavior Change