HP Integrity Virtual Machines Installation, Configuration, and Administration Version A.03.50

NOTE: If you modify a vNIC from lan to avio_lan, or avio_lan to lan, you must restart
the vswitch.
As with virtual storage devices, use the -a rsrc option to associate a guest virtual network device
with a vswitch. Before you use this option to associate the virtual network device with a vswitch,
create the vswitch using the hpvmnet command. The format of the rsrc parameter for network
devices is:
network:adapter-type:[hardware-address]:vswitch:vswitch-name
The guest virtual network device information consists of the following fields, separated by colons:
• network
• adapter-type, which can be either lan or avio_lan
• [hardware-address] (optional), formatted as bus,device,mac-addr. If you do not
specify the hardware address, or a portion of it, the information is generated for you. HP
recommends allowing Integrity VM to generate the hardware address. The hardware address
consists of the following information:
— bus (virtual network device PCI bus number)
— device (virtual network device PCI slot number)
— mac-addr (the virtual network device MAC address) in either of the following formats:
0xaabbcc001122 or aa-bb-cc-00-11-22. The MAC address that you enter is
checked to make sure it does not conflict with any of the VM Host’s physical network
adapter MAC addresses.
• vswitch
The virtual switch information is formatted as vswitch:vswitch-name (where
vswitch-name is the name assigned to the virtual network switch when you create it using
the hpvmnet command)
8.3.1 Removing vNICs
To remove a vNIC from a virtual machine's configuration, first stop the guest using the hpvmstop
command. Then use the -d option to the hpvmmodify command. The -d option allows you to
specify the vswitch and the vNIC information. The following is the syntax of the hpvmmodify
-d command:
hpvmmodify -P vm-name -d network:adapter-type:[hardware-address]:vswitch:vswitch-name
After making this change, start the guest using the hpvmstart command.
8.4 Configuring VLANs
A local area network (LAN) defines a broadcast domain in which bridges and switches connect
all end nodes. Broadcasts are received by every node on the LAN, but not by nodes outside the
LAN.
A virtual LAN (VLAN) defines logical connectivity instead of the physical connectivity defined
by a LAN. A VLAN provides a way to partition a LAN logically such that the broadcast domain
for a VLAN is limited to the nodes and switches that are members of the VLAN.
VLANs provide the following benefits:
• Enhanced security through traffic isolation within nodes that are VLAN members
• Bandwidth preservation, limiting the broadcast domain to a VLAN instead of the entire
LAN
• Enhanced manageability for node migrations and network topology changes
Figure 8-2 illustrates a basic virtual machine VLAN that allows guests on different VM Host
systems to communicate.
116 Creating Virtual Networks