Hardware and Software Installation Procedure
Optional Step: Configure Jumbo Frames Size (Jumbo frames are supported only at 1000 Mbit/s)
10
Adapter
The last two digits of the hardware path (third column) reflect the path of each port.
Optional Step: Configure Jumbo Frames Size
(Jumbo frames are supported only at 1000 Mbit/s)
•
Jumbo frames for the
iether
driver on HP-UX 11i v 1.0 and on11i v 2.0 of September 2004 (or later) have
an mtu_size in the range from 1501 to 9000 bytes.
If you are using Jumbo Ethernet frames, ensure that:
— all end stations on a given
LAN
1
have the same maximum transmission unit (MTU) setting;
— intermediate stations such as switch ports in your LAN have an MTU equal to or greater than the end
station’s MTU.
•
Obtain the PPA number of the card by entering
lanscan
.
•
Choose one of two configuration methods that will permanently save your configuration.
— use the GUI-based system admin manager (SAM).
To use SAM, type
sam
at the HP-UX system prompt; then double-click Networking and
Communications, and then Advanced Configuration--see
Ethernet Support Guide
for details, and then
do the steps for verifying the MTU size;
or
edit the following configuration file using an editor such as “vi”:
/etc/rc.config.d/hpietherconf
.
Set the mtusize by editing HP_IETHER_MTU[0]=
mtusize
, and insert the proper interface name:
HP_IETHER_MTU[i]=HP_IETHER_INTERFACE_NAME. When the system reboots, the interface
will be configured for jumbo frame operation.
•
Verify MTU change by entering
netstat -rn
. If MTU has not changed, enter the following commands:
$
ifconfig lan
PPA_number unplumb
$
ifconfig lan
PPA_number ip_address netmask netmask up
•
To check (or verify) the current Ethernet frame size, enter:
$
lanadmin -m
PPA_number
An alternative way to temporarily configure jumbo frame size is to enter:
lanadmin -M
mtu_size PPA_number
.
Using
lanadmin
is temporary because it will not preserve your settings across reboots.
The
PPA_number
is the one we obtained from the output of lanscan. For using Jumbo Frames with the
iether
Gigabit Ethernet driver on HP-UX 11i v 1.0 or 11i v 2.0 of September 2004 (or later), set the mtu_size to a
number from 1501 to 9000 (bytes).
For Further Information
For further information on the Gigabit Ethernet and SCSI as implemented in this card, please refer to
http://docs.hp.com
and then look under I/O Cards and Networking Software. This card’s information is
primarily located under the subsection called “Combination Cards.”
1. In the Jumbo Frames discussion, “LAN” means that the end stations do not have any routers or
layer 3 switches in between them.
