rp_filter for multiple private interconnects and Linux Kernel 2.6.32+ (Doc ID 1286796.1)

Last updated on FEBRUARY 06, 2017

Applies to:

Oracle Exadata Hardware - Version 11.2.0.1 and later
Oracle Database - Enterprise Edition - Version 11.2.0.1 and later
Linux OS - Version Oracle Linux 5.0 to Oracle Linux 5.0 [Release OL5]
Generic Linux




Symptoms

Interconnect packets may potentially be blocked/discarded. This can cause various failures, such as:
unpublished Bug 10245620, "LNX64-112020-GIBONE-CMP: CAN'T START MORE THAN ONE INST DUE TO IMR RECONF HUNG"

Changes

In kernel 2.6.31 and above, which also includes Oracle's Unbreakable Enterprise Kernel (UEK) (2.6.32), a bug has been fixed in the Reverse Path Filtering. The Linux Reverse Path Filtering bug that has been corrected in kernel 2.6.31 and above is described in:

http://linux.derkeiler.com/Mailing-Lists/Kernel/2009-09/msg04929.html
and
http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Technical_Notes/ar01s04s02.html

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms