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Chapter 4. System planning and configuration using VIOS with IVM 113
ent2 Available 01-21 Gigabit Ethernet-SX PCI-X Adapter (14106703)
vsa0 Available LPAR Virtual Serial Adapter
vscsi0 Available Virtual SCSI Client Adapter
#
4.5.4 VLANs and virtual networks
When the VIO Server is installed four virtual Ethernet adapters are created
automatically. These adapters have Port VLAN Identifiers (PVID) of 1-4. These
PVIDs are considered untagged and do not leave the VIO Server. In order to
extend a VLAN environment into the virtual network. The concept of VLAN
tagging using IEEE 802.1q protocol is used to make the extension.
IVM does not provide a direct way to create 802.1q aware interfaces but can
manage the assignment of these interfaces after they are created using the CLI.
The steps to perform, and the VIO Server user interfaces used are:
򐂰 Create IEEE 802.1q aware virtual Ethernet adapter on the VIOS that will act
as a trunking adapter to carry multiple VLANs (CLI)
򐂰 Create a SEA between the physical adapter and the VLAN aware virtual
Ethernet adapter on the VIO Sever (IVM)
򐂰 Assign the LPAR virtual Ethernet adapter to the VIO Server virtual Ethernet
򐂰 Run cfgmgr on LPAR (if running) and configure new interfaces (client LPAR
CLI)
Section 3.6 in IBM System p Advanced POWER Virtualization (PowerVM) Best
Practices, REDP-4194 contains additional discussions on extending VLANs into
virtual networks. The implementation covered in this Redpaper is for a Hardware
Management Console or HMC managed system not IVM, but the technical
discussions of VLANs in a virtual network are relevant.
Another example of implementation from an IBM BladeCenter and VIOS/IVM
perspective, Complex networking using Linux on Power blades, can be found at
this link:
Note: When removing a physical adapter from a LPAR you may have to
remove a PCI bus device with a rmdev command from the LPAR’s command
line. The IVM interface will display an error message with text indicating the
device that must be removed before the change in LPAR assignment can
performed.
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