The Statistic Value of Dropped Packets of Network Interface Increases Constantly in UEK2/UEK3/UEK4 Kernel (Doc ID 1515650.1)

Last updated on JULY 19, 2017

Applies to:

Exadata X4-2 Full Rack - Version All Versions and later
Linux OS - Version Oracle Linux 6.5 with Unbreakable Enterprise Kernel [3.8.13] to Oracle Linux 7.3 with Unbreakable Enterprise Kerne [3.8.13] [Release OL6U5 to OL7U3]
Linux OS - Version Oracle Linux 5.0 to Oracle Linux 6.9 with Unbreakable Enterprise Kernel [2.6.39] [Release OL5 to OL6U9]
Linux x86-64
Linux x86

Symptoms

The network interface card(NIC) drops packets continuously when run Oracle UEK2 kernel (2.6.39) or UEK3 kernel (3.8.13) or UEK4  and  the packets dropping  issue does not exist under RHCK kernel (RedHat Compatible Kernel) like  2.6.32-279.el6.

Example below:

This applies to all types of interface: native, bonded, vlan and virtual.

Cause

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