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Exalogic virtual creates interface configuration files on vServers that provide an incorrect MTU value for EoIB related interfaces (Doc ID 1611657.1)

Last updated on FEBRUARY 03, 2019

Applies to:

Oracle Exalogic Elastic Cloud Software - Version 2.0.4.0.2 and later
Information in this document applies to any platform.

Symptoms

You are running Exalogic Elastic Cloud Software (EECS) in a virtual configuration and have created virtual servers (vServers) via Enterprise Manager OpsCenter Control (EMOC) that have been configured with network interfaces on EoIB networks. However, when you review the interface configuration files created for EoIB related interfaces under /etc/sysconfig/network-scripts, you notice that the MTU value set is 64000 which is much higher than the maximum value of 1500 appropriate for an EoIB interface:

 

Changes

While such EoIB network interfaces may work in the vServer environment where they were initially created it is possible that further patching to the vServer environment by applying Oracle Quarterly Patchset Updates (PSU) or running "rpm" or "yum" commands to update software packages can cause the interfaces to unexpectedly stop working over time.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
 On each vServer, identify all EoIB related interfaces:
 For each interface identified by Step 1 above, determine which bonded interfaces each EoIB interface belongs to:
 For each distinct bond interface identified by Step 2 above, review the current MTU setting:
 Update the MTU configuration if the value reflected is 64000 (which is appropriate only for IPoIB interfaces and not EoIB interfaces)
 fixEoibMtu.sh Script
 Example Output
 Example Output via DCLI based Execution
References


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