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Setting MTU on ibmveth-NIC larger than 2000 Bytes not possible on a pSeries server

This document (3086596) is provided subject to the disclaimer at the end of this document.

Environment

SUSE Linux Enterprise Server 10

Situation

Setting MTU on ibmveth-NIC larger than 2000 bytes is not possible on a pSeries server

Example: 
ifconfig eth0 mtu 9000
SIOCSIFMTU: Invalid argument

Resolution

Enable the setting /sys/class/net/eth0/device/pool2/active in the following
way in order to be able to use MTUs larger than 2000: 
echo 1 >/sys/class/net/eth0/device/pool2/active
ifconfig eth0 mtu 9000

Disclaimer

This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:3086596
  • Creation Date: 16-Feb-2007
  • Modified Date:22-Feb-2021
    • SUSE Linux Enterprise Server

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