IBM Systems magazine, Power Systems - June 2020 - 31

In late 2018, IBM introduced SR-IOV VNIC (Virtual
Network Interface Controller),
which supports LPM. Unlike
SR-IOV logical ports, which have
no dependency on a VIO server,
VNIC utilizes a VF device that's automatically created and assigned
to the VIOS when the VNIC client
adapter is created. While VNIC
doesn't support the direct access
I/O model of SR-IOV logical ports,
it does still provide a reduction in
VIOS CPU and memory consumption, as well as lower latencies
when compared to SEA configurations with virtual Ethernet.

FIGURE 1: HOW THE LIVE MIGRATION TOOL WORKS

SR-IOV Migration Tool
Live migration from virtual Ethernet to SR-IOV devices

Virtual I/O Server
Phys.
Adapter

Client Partition

SEA
Virtual
Trunk

Logical
Port

30%

Migrate IP Address

VNIC
Device

vNIC
Server

VETH
Device
9.5.110.12

Hypervisor

2x 10 Gbe SR

Why Transition to SR-IOV?
In addition to the savings in CPU
and memory consumption, SR-IOV
can provide a significant increase
in throughput for workloads that
require a large number of transactions per second (TPS). There
are real-world scenarios where
SR-IOV logical ports and VNIC can
satisfy a client's network performance requirements that wouldn't
have been possible with previous
network virtualization technologies
(see Figure 1, above).
Additionally, SR-IOV provides
better out-of-the-box performance
than virtual Ethernet, with no additional tuning. 
 

How Do I Convert
From Virtual Ethernet
to SR-IOV VNIC?
With a traditional virtual Ethernet
configuration utilizing a shared
Ethernet adapter, each client LPAR
would be assigned an adapter
through the client's HMC partition
profile. The client OS will have a
number of logical devices associated with the virtual Ethernet
adapter, possibly with their own
interface-specific tunables. 
Migrating from virtual Ethernet to SR-IOV would require (at a
minimum): adding a new SR-IOV
adapter for each individual client

2x 1 Gbe copper

4-port 10GbE CNA/FCoE & 1GbE Adapter

LPAR, migrating the IP address,
re-applying any interface-specific
tunables, cleaning up OS devices and saving the changes to the
client's partition profile. This can
be a very time-consuming and
error-prone process, especially for
clients that have a large number of
partitions to migrate to SR-IOV. 

What's the IBM SR-IOV
Migration Tool?
IBM developed the SR-IOV Migration Tool to assist clients in the migration process from virtual Ethernet to SR-IOV. With the IBM SR-IOV
Migration Tool, clients can dynamically and non-disruptively migrate
to SR-IOV VNIC with no downtime.
This includes live-migrating the
IP address from the old virtual
Ethernet device to the new SR-IOV
VNIC adapter (AIX® only). The tool
also allows for the optional removal of any OS-level devices, as well
as removing the virtual Ethernet
adapter from the client's HMC partition profile.
The tool can also gather information about the client's existing

SR-IOV adapters and their configuration, such as the number of logical
ports assigned to a given physical
port, port labels and capacities, and
report that information in an easily
digestible format. This information
can be invaluable when planning for
the adoption of SR-IOV, as it allows
the client to see how many logical
ports are available, as well as their
remaining capacity. 
The tool currently supports
IBM AIX versions 7.1 and 7.2, with
SUSE Linux® on POWER® support
planned in the near future. Additionally, the tool allows for adjusting the maximum capacity setting
for a given VNIC device, a feature
that's not available through the
HMC GUI. The SR-IOV Migration
Tool can be a very valuable asset,
allowing clients to implement a
repeatable, consistent methodology
for the adoption of SR-IOV in their
environment.
James Chandler is a certified IT
management consultant working
for the IBM Systems Lab Services
Power Systems Delivery Practice.
IBMSYSTEMSMAG.COM JUNE 2020 | 31


http://www.IBMSYSTEMSMAG.COM

IBM Systems magazine, Power Systems - June 2020

Table of Contents for the Digital Edition of IBM Systems magazine, Power Systems - June 2020

Table of Contents
From the Editor: Deeper insights, deeper innovation
IBM Perspective: Modeling medical advancements with AI
Currents: Removing the bias: The challenge of building a better AI model
Currents: IBMer Megan Hampton teaches refugees how to code
Partner POV: Leverage IBM Db2 for i in building AI models
Cover Story: AI for Good
Feature 1: The Growth Model: H20 Driverless AI on IBM Power Systems brings the AI/machine learning world to business
TECH Showcase: Minimize risks to your organization by leveraging built-in security features
Techbits: The benefits of a mixed IBM POWER9 server environment for SAS Viya 3.5
Techbits: Ask the expert: What's SR-IOV?
Snapshot: Former Fresh Faces
2020 Power Systems Solutions Directory
IBM Systems magazine, Power Systems - June 2020 - Intro
IBM Systems magazine, Power Systems - June 2020 - Cover1
IBM Systems magazine, Power Systems - June 2020 - Cover2
IBM Systems magazine, Power Systems - June 2020 - 1
IBM Systems magazine, Power Systems - June 2020 - Table of Contents
IBM Systems magazine, Power Systems - June 2020 - From the Editor: Deeper insights, deeper innovation
IBM Systems magazine, Power Systems - June 2020 - IBM Perspective: Modeling medical advancements with AI
IBM Systems magazine, Power Systems - June 2020 - 5
IBM Systems magazine, Power Systems - June 2020 - Currents: Removing the bias: The challenge of building a better AI model
IBM Systems magazine, Power Systems - June 2020 - 7
IBM Systems magazine, Power Systems - June 2020 - Currents: IBMer Megan Hampton teaches refugees how to code
IBM Systems magazine, Power Systems - June 2020 - CT1
IBM Systems magazine, Power Systems - June 2020 - CT2
IBM Systems magazine, Power Systems - June 2020 - 9
IBM Systems magazine, Power Systems - June 2020 - 10
IBM Systems magazine, Power Systems - June 2020 - 11
IBM Systems magazine, Power Systems - June 2020 - Partner POV: Leverage IBM Db2 for i in building AI models
IBM Systems magazine, Power Systems - June 2020 - 13
IBM Systems magazine, Power Systems - June 2020 - Cover Story: AI for Good
IBM Systems magazine, Power Systems - June 2020 - 15
IBM Systems magazine, Power Systems - June 2020 - 16
IBM Systems magazine, Power Systems - June 2020 - 17
IBM Systems magazine, Power Systems - June 2020 - Feature 1: The Growth Model: H20 Driverless AI on IBM Power Systems brings the AI/machine learning world to business
IBM Systems magazine, Power Systems - June 2020 - 19
IBM Systems magazine, Power Systems - June 2020 - 20
IBM Systems magazine, Power Systems - June 2020 - 21
IBM Systems magazine, Power Systems - June 2020 - 22
IBM Systems magazine, Power Systems - June 2020 - TECH Showcase: Minimize risks to your organization by leveraging built-in security features
IBM Systems magazine, Power Systems - June 2020 - 24
IBM Systems magazine, Power Systems - June 2020 - 25
IBM Systems magazine, Power Systems - June 2020 - 26
IBM Systems magazine, Power Systems - June 2020 - CT3
IBM Systems magazine, Power Systems - June 2020 - CT4
IBM Systems magazine, Power Systems - June 2020 - Techbits: The benefits of a mixed IBM POWER9 server environment for SAS Viya 3.5
IBM Systems magazine, Power Systems - June 2020 - 28
IBM Systems magazine, Power Systems - June 2020 - 29
IBM Systems magazine, Power Systems - June 2020 - 30
IBM Systems magazine, Power Systems - June 2020 - Techbits: Ask the expert: What's SR-IOV?
IBM Systems magazine, Power Systems - June 2020 - Snapshot: Former Fresh Faces
IBM Systems magazine, Power Systems - June 2020 - Cover3
IBM Systems magazine, Power Systems - June 2020 - Cover4
IBM Systems magazine, Power Systems - June 2020 - 2020 Power Systems Solutions Directory
IBM Systems magazine, Power Systems - June 2020 - CoverSD2
IBM Systems magazine, Power Systems - June 2020 - SD1
IBM Systems magazine, Power Systems - June 2020 - SD2
IBM Systems magazine, Power Systems - June 2020 - SD3
IBM Systems magazine, Power Systems - June 2020 - SD4
IBM Systems magazine, Power Systems - June 2020 - CT5
IBM Systems magazine, Power Systems - June 2020 - CT6
IBM Systems magazine, Power Systems - June 2020 - SD5
IBM Systems magazine, Power Systems - June 2020 - SD6
IBM Systems magazine, Power Systems - June 2020 - SD7
IBM Systems magazine, Power Systems - June 2020 - SD8
IBM Systems magazine, Power Systems - June 2020 - SD9
IBM Systems magazine, Power Systems - June 2020 - SD10
IBM Systems magazine, Power Systems - June 2020 - SD11
IBM Systems magazine, Power Systems - June 2020 - SD12
IBM Systems magazine, Power Systems - June 2020 - SD13
IBM Systems magazine, Power Systems - June 2020 - SD14
IBM Systems magazine, Power Systems - June 2020 - SD15
IBM Systems magazine, Power Systems - June 2020 - SD16
IBM Systems magazine, Power Systems - June 2020 - SD17
IBM Systems magazine, Power Systems - June 2020 - SD18
IBM Systems magazine, Power Systems - June 2020 - SD19
IBM Systems magazine, Power Systems - June 2020 - SD20
IBM Systems magazine, Power Systems - June 2020 - SD21
IBM Systems magazine, Power Systems - June 2020 - SD22
IBM Systems magazine, Power Systems - June 2020 - SD23
IBM Systems magazine, Power Systems - June 2020 - SD24
IBM Systems magazine, Power Systems - June 2020 - SD25
IBM Systems magazine, Power Systems - June 2020 - SD26
IBM Systems magazine, Power Systems - June 2020 - SD27
IBM Systems magazine, Power Systems - June 2020 - SD28
IBM Systems magazine, Power Systems - June 2020 - SD29
IBM Systems magazine, Power Systems - June 2020 - SD30
IBM Systems magazine, Power Systems - June 2020 - SD31
IBM Systems magazine, Power Systems - June 2020 - SD32
IBM Systems magazine, Power Systems - June 2020 - SD33
IBM Systems magazine, Power Systems - June 2020 - SD34
IBM Systems magazine, Power Systems - June 2020 - SD35
IBM Systems magazine, Power Systems - June 2020 - SD36
IBM Systems magazine, Power Systems - June 2020 - SD37
IBM Systems magazine, Power Systems - June 2020 - SD38
IBM Systems magazine, Power Systems - June 2020 - SD39
IBM Systems magazine, Power Systems - June 2020 - SD40
IBM Systems magazine, Power Systems - June 2020 - SD41
IBM Systems magazine, Power Systems - June 2020 - SD42
IBM Systems magazine, Power Systems - June 2020 - SD43
IBM Systems magazine, Power Systems - June 2020 - SD44
IBM Systems magazine, Power Systems - June 2020 - SD45
IBM Systems magazine, Power Systems - June 2020 - SD46
IBM Systems magazine, Power Systems - June 2020 - SD47
IBM Systems magazine, Power Systems - June 2020 - SD48
IBM Systems magazine, Power Systems - June 2020 - CoverSD3
IBM Systems magazine, Power Systems - June 2020 - CoverSD4
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