2.2.21 Default reverse path filtering mode affects certain Oracle products

Oracle Linux 6 defaults to reverse path filtering in strict mode. Some Oracle products and network storage devices work more reliably with reverse path filtering in loose mode. To enable loose mode, run the following command

# sysctl net.ipv4.conf.iface.rp_filter=2

where iface is the network interface, for example, eth1.

The default setting for strict mode is 1. (Bug ID 10649976)