HP vPars and Integrity Virtual Machines V6.1 Administrator Guide

vmlan4 23 Up Shared lan4 0x00127942fce3 192.1.2.205
vmlan900 24 Up Shared lan900 0x00306e39815a 192.1.4.205
NOTE: The lanadmin command is deprecated and will be removed in a future HP-UX release.
HP recommends that you use the nwmgr command to perform all network interface-related tasks.
The following table shows the nwmgr command that performs the same task as the lanadmin
command:
Table 23 The nwmgr command
nwmgr Command
Legacy CommandTask
# nwmgr -g -A all -c lan4 |
grep Checksum
Transmit Checksum Offload=Off
Receive Checksum Offload=On
# lanadmin -x cko 4
Hardware TCP/UDP (IPv4)
transmit checksum offload
is currently enabled.
Hardware TCP/UDP (IPv4)
receive checksum offload is
currently disabled.
Check the status of the transmit CKO.
# nwmgr -s -A tx_cko=off -c
4
lan2 current values:
Transmit Checksum Offload=Off
# lanadmin -X send_cko_off
4
Hardware TCP/UDP (IPv4)
transmit checksum offload
is currently disabled.
In this example, the VLANs are
configured over the vswitch vmlan4.
This vswitch is created on PPA 4 on
the VSP.
Turn off CKO on PPA 4 by entering
this command on the VSP.
10.6.3 Troubleshooting VLAN-Backed vswitches
To enable the VLAN-backed vswitch (VBVsw) feature, PHNE_40215 or a superseding patch is
required to be installed on the VSP. This patch is available as an individual patch or as part of
"FEATURE11i" bundle. To verify that the patch is installed, enter the following:
# swlist -l product | grep PHNE_40215
PHNE_40215 1.0 LAN cumulative patch
The dlpi_max_ub_promisc kernel tunable needs to be set to when using a VBVsw type vswitch.
Otherwise, attempting to boot the vswitch fails with the following error message from the hpvmnet
command:
# hpvmnet -b -S vs5000
hpvmnetd: setup_downlink: promisc failed, recv_ack:
promisc_phys: UNIX error - Device busy, errno 5
To set the kernel tunable, enter the following:
# kctune dlpi_max_ub_promisc=
10.7 Other issues and notes
The following list provides networking information with the Integrity VM V6.1 release:
• If you modify the MAC address of an interface in the guest, the hpvmstatus command in
the VSP does not display the current MAC address correctly. There is no fix or workaround
for this problem at this time.
• Just as with physical devices on a network, for communication to occur uninterrupted between
all stations on a LAN segment, the MTUs of all the systems on the LAN segment or VLAN must
match, whether they are physical systems or guests. The VSP does not check for MTU
mismatches for its guests.
• The lanadmin card specific options that are supported on igssn on the guest are:
◦ -x:speed,fctrl,cko,type,card_info,stats drv,vmtu,and drv_pr.
◦ -X:drv_pr_on,drv_pr_off,stats clear
164 Creating virtual networks