HP Integrity Virtual Machines 4.2.5: Release Notes

incorrectly. To help mitigate this issue use the minpoll and maxpoll directives in the ntp.conf
file to change the polling intervals.
Start with minpoll at 4 (16 seconds) and maxpoll at 6 (64 seconds) and then reduce maxpoll
towards 4 if necessary to force shorter polling intervals. HP recommends that a VM guest never
be allowed to deliver time (allow guests to be a time consumers). Because a VM guest never delivers
time, you do not need to configure the local clock (server 127.127.1.0) or an ntp.drift file.
So, the ntp.conf file on a VM guest should be as simple as the single line:
server <VM-HOST-SERVER-NAME> minpoll 4 maxpoll 6
After configuring the guest's /etc/ntp.conf file, assuming NTP is already enabled (that is, the
XNTPD variable in /etc/rc.config.d/netdaemons is set to 1, as in export XNTPD=1), you
can run the following commands on an HP-UX guest to sync its time with the VM Host and restart
xntpd:
/sbin/init.d/xntpd stop
/usr/sbin/ntpdate -b <VM-HOST-SERVER-NAME>
/sbin/init.d/xntpd start
NOTE: For VM guests that are on a different subnet than the VM Host, the VM Host may not be
the best source of time if there is another accurate time server available with less network latency.
In the case of different subnets, measure latency from the guest to various time servers using the
ping and traceroute commands to determine which potential time server has the least network
latency. Using the VM Host may be the best solution, but this depends on your local network
topology and the relative network distance to alternate time servers. If using an alternate
(non-VM-Host) time server appears best, it may be helpful for the alternate time server and the VM
Host to use each other for peer mutual time synchronization.
7.2.10 Supported Adapters
Integrity VM supports those adapters that are of Ethernet or the IEEE 802.3 CSMA/CD network.
Note that AVIO interfaces are supported by a select set of Ethernet host NICs. The following Ethernet
cards are supported with AVIO on HP-UX guests:
• A6794A — Core
• A6825A — Core
• A7109A — Core
• A6847A — Add-in
• AB465A — Combo Add-in
• A9782A — Combo Add-in
• A9784A — Combo Add-in
• AB352 — Core
• AB545A — Networking Add-in
• A7011A — Networking Add-in
• A7012A — Networking Add-in
• AB290A — Combo Add-in
• AB287A — Add-in (10GbE)
• AD331A — Add-in
• AD332A — Add-in
• AD193A — Combo Add-in
• AD194A — Combo Add-in
7.2 Known Issues and Information 73