OpenVMS Installation

Installing the Adapter

The LAN device characteristics that can be set include speed, duplex mode, flow control, and whether jumbo frames are enabled. The MC LANCP SET DEVICE and LANCP DEFINE DEVICE commands modify these settings.

2.Set the desired characteristics according to the Network Configuration worksheet (see Table 2-1). For example, use this command:

MC LANCP DEFINE DEVICE devname /SPEED=1000 /FULL /AUTONEGOTIATE

Table 2-1

Network Card Configuration Worksheet

 

 

 

 

 

 

 

 

Required

 

Where to

 

 

Data Type

/

Default

Example

Your System

Configure

 

Optional

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Station

Built-in

As shown on

not

0x0060b0c4012f

 

address

and

card

configurable

 

 

 

cannot be

 

 

 

 

 

changed

 

 

 

 

 

 

 

 

 

 

Link

Optional

Autonegotiating

LANCP

MC LANCP SET

 

configuration

 

 

 

DEVICE

 

 

 

 

 

/AUTONEGOTIA

 

 

 

 

 

TE

 

 

 

 

 

 

 

Link

Optional

Autonegotiating

Hub or

MC LANCP SET

 

speed/duplex

 

 

switcha or

DEVICE/

 

mode

 

 

LANCP

SPEED=1000

 

 

 

 

 

/FULL

 

 

 

 

 

 

 

MTU

Optional

1518 Bytes

LANCP

MC LANCP SET

 

(Maximum

 

 

 

DEVICE/JUMBO

 

Transmission

 

 

 

 

 

Unit): Jumbo

 

 

 

 

 

Frames

 

 

 

 

 

 

 

 

 

 

 

Receive flow

Optional

On

LANCP

MC LANCP SET

 

control

 

 

 

DEVICE/FLOW

 

 

 

 

 

 

 

a.The speed configuration of the 1000Base-T can be 10, 100, or 1000 Mbps and is determined by the speed setting of the hub or switch port to which the card is connected. The card automatically senses this speed if autonegotiation is enabled. The card only runs at one speed at a time.

To make any configuration values permanent, enter the values in the LANCP permanent device database.

Optional Step: Defining Jumbo Frame Size

(Jumbo Frames Size (Jumbo frames are supported only at 1000 Mbit/s)

Jumbo frames for the LAN driver on OpenVMS V8.2 have an mtu_size in the range of 1518-8192 bytes.

Jumbo frames are enabled system-wide by setting bit 6 in the system parameter LAN_FLAGS. To enable jumbo frames on individual devices, use the LANCP command SET DEVICE/JUMBO. To disable jumbo frames, use the LANCP command SET DEVICE/NOJUMBO.

To preserve the setting of jumbo frames across boots, when using LANCP, define the setting in the LANCP permanent device database, using the command DEFINE DEVICE/JUMBO.

Chapter 2

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