Rhel 5 bnx2 packet loss

[MSwift]

We are losing network packets consistently on RHEL5 env. with Oracle RAC (11 G) interconnect env on bnx2 NIC. We tried to use MTU of 9000 to achieve better network throughput. Anyone seen this issue?

Thanks

Mike.

[Reiner Rottmann]

There is an issue with the bnx2 driver that causes package loss within high traffic environments that use jumbo frames.

See Red Hat knowledgebase article:
https://access.redhat.com/kb/docs/DOC-18867

If you have no access to this, here the synopsis:
The issue has been fixed with a newer kernel release. But there are workarounds:

-disable jumbo frames
-update nic firmware
-disable checksum offloading ( ethtool -K ethX off)
-use a different nic