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Status Needs more information
Workspace PowerVM VIOS
Created by Guest
Created on May 20, 2022

SEA over a 10Gb Ethernet Port in VIOS. Allow Virtual Ethernet Adapters in client partitions to run at 10Gb rather than a maximum of 1Gb.

Current limitation of Virtual Ethernet Adapters to run at 1Gb. If a 10Gb Ethernet port is set up as an SEA in VIOS, then client partitions using the bridge of virtual to physical are limited by the Virtual Ethernet Adapter maximum of 1Gb bandwidth. Some features don't allow partitions to own hardware so it means they can't run 10Gb or close to it - this is especially the case with IBM i partitions.

Please can Virtual Ethernet Adapters be allowed to run a higher bandwidth than 1Gb to allow better use of 10Gb physical ports.

Idea priority Medium
  • Guest
    Feb 20, 2024

    Can you please let us know the following:
    1. is 'qos_mode' enabled on SEA?
    2. was IBM-i LPAR using VLANs and Priorities to VLANs?
    3. was other LPARs are pushing traffic in parallel with IBM-I LPAR?
    4. Did you see same issue on AIX or Linux LPARs? or was it specifically seen by IBM-i LPAR only?
    5. May I know how you were able to generate traffic and calculate bandwidth - are you using iperf or netperf?
    For more information on SEA QoS please refer this link -

    * SEA-Shared Ethernet Adapter