HP Integrity Virtual Machines Version 4.2 Release Notes

• Attempting to start an OpenVMS guest that is using two different localnet vswitches on the
same guest
• Using a different localnet vswitch than an already active OpenVMS guest is using
7.2 Known Issues and Information
The following sections describe known issues and information from previous releases that still
apply to V4.2.
7.2.1 Location of AVIO Networking Driver for Linux and Windows Guests
AVIO networking driver for Linux and Windows are available in VMGuestSW bundle of Integrity
VM host software on the http://software.hp.com website. Go to this website, and search for the
VMGuestSW bundle.
7.2.2 Changing Network Device Type on Linux Guest
If you change the type of network device on a Linux guest, either from VIO to AVIO or AVIO
to VIO, follow these steps:
1. Specify the correct network driver associated with the device type in the /etc/
modprobe.conf file. For example, if the eth0 network device type is changing from VIO
to AVIO and the existing alias line reads alias eth0 e1000, change it to the following::
alias eth0 lgssn
2. Issue the depmod -a command to inform the kernel of the device type change. After you
issue the command, you should see the following (or similar) line in modules.dep file:
/lib/modules/2.6.9-55.EL/kernel/drivers/net/lgssn/lgssn.ko:
For example:
# grep lgssn /lib/modules/2.6.9-42.EL/modules.dep
/lib/modules/2.6.9-42.EL/kernel/drivers/net/lgssn/lgssn.ko:
These two steps enable automatic loading of the AVIO Linux LAN guest driver (lgssn) at boot
time.
7.2.3 Using Network Time Protocol (NTP) in Integrity VM Environments
Using NTP in Integrity VM environments is recommended to keep time-of-day clocks in sync
and correct. Use xntpd on HP-UX and ntpd on Linux to synchronize time use NTP.
NTP Configuration on a VM Host
On each VM Host, NTP should be configured just as it would be on any typical (non-virtual)
system. In /etc/ntp.conf, specify a drift file and one or more high quality time servers:
driftfile /etc/ntp.drift
server <A-HIGH-QUALITY-TIME-SERVER> prefer # a preferred time source
server <ANOTHER-HIGH-QUALITY-TIME-SERVER> # a backup time source
server <YET-ANOTHER-HIGH-QUALITY-TIME-SERVER>
The local clock should also be configured as a fall back if necessary:
server 127.127.1.0 # use local clock as backup
fudge 127.127.1.0 stratum 10 # show poor quality
If you have a group of VM Hosts that you would like to synchronize, you can add "peer" references
in the /etc/ntp.conf file for each of those associated VM Hosts, so they will do mutual
synchronization:
peer <AN-ASSOCIATED-VM-HOST>
peer <ANOTHER-ASSOCIATED-VM-HOST>
peer <YET-ANOTHER-ASSOCIATED-VM-HOST>
68 Networking Information