HP 3000 Manuals HP 3000 Manuals
Adding Ethernet Support
To update the LAN configuration for Ethernet support, you need to do the
following:
* If you are updating your system from a previous MPE/iX release,
you must run NMMGRVER to update your NMCONFIG configuration file.
* Update the NMCONFIG.PUB.SYS file using NMMGR.
* If needed, update the network directory with remote system names.
* Restart the network in order to activate the new configuration
file.
Convert NMCONFIG to New Release
If you are updating your MPE/iX system from a previous release, you must
update your NMCONFIG file. Run the utility NMMGRVER.PUB.SYS to convert
the NMCONFIG file to the new release. NMMGRVER prompts you for the files
to convert, and creates a backup file. For instructions on running
NMMGRVER, refer to the NS3000/XL Operations and Maintenance Manual.
Updating NMCONFIG File
Before updating the configuration file, obtain the configured name of the
LAN NI, and the local node name. In addition, make sure you have a
loopback NI of type LOOP configured.
From within the NMMGR program, you can check what the configured NIs are.
After you have opened the NMCONFIG.PUB.SYSfile, enter the direct path
@NETXPORT.NI. The Network Interface Configuration Screen is displayed.
Under the heading Configured Network Interfaces, verify that an NI of
type LAN and an NI of type LOOP have been configured.
Before updating the configuration file, shut down the transport (and the
Network Services if installed). Issue an NSCONTROL STOP followed by an
NSCONTROL ABORT for the Network Services, and NETCONTROL STOP for the
transport.
1. Run NMMGR.
NA or NM user capability is required to update the NMCONFIG.PUB.SYS
configuration file.
At the MPE/iX prompt, type:
:NMMGR
2. Open the Configuration File.
The first screen displayed is the Open Configuration/Directory File
screen.
The configuration file named NMCONFIG.PUB.SYS is displayed. Press the
Open Config key to proceed with updating the configuration.
3. Go to NS.
At the next screen, Main, make sure that the name of the local node is
showing and press the NS key to go to the Network Services branch.
4. Go to Guided.
From the next screen, the NS Configuration screen, press the Guided
Config key to proceed with guided configuration.
5. Select the LAN NI to modify.
On the next screen, the Network Transport Configuration screen, enter the
name of the LANnetwork interface (NI) in the field labeled NI name, and
press the Config Network key to proceed with guided configuration.
6. Update the LAN NI Configuration.
The LAN Configuration screen is displayed. Use the Tab key to reach the
Enable Ethernet? field and enter Y for yes.
Press the Save Data key to save the Ethernet change.
Press the Validate Netxport key to validate the transport configuration
before exiting from NMMGR.
7. Additional Updates.
Before exiting NMMGR, check the section, "Changing ARP Parameters" to
verify that the default ARP parameters are correct for your installation.
In addition, review the paragraphs under "Network Traffic" and update the
IP Protocol Configuration if necessary for your installation.
If you want to provide NS node names for remote systems that do not
support probe, see the subsection, "Updating the Network Directory." To
configure ARPA domain names, see the subsection titled "Configuring ARPA
Domain Names" in this chapter.
8. Exit from NMMGR.
To exit the NMMGR program, hold down the Shift key and press the Tab key
which returns you to the command prompt. At the command prompt, enter:
EXIT, then press the Enter key.
9. Restarting the Network.
After updating the LAN to support Ethernet, you need to restart the
network in order to activate the changed configuration file as described
later in this chapter under the heading, "Restarting the Network."
Changing ARP Parameters
When you use guided configuration to update the LAN NI for Ethernet
support, default parameters are set for the address resolution protocol
(ARP) configuration.
To verify what these are, or to change them, do the following:
1. Obtain the configured LAN NI name (issue a NETCONTROL STATUS
command)
2. Run NMMGR.PUB.SYS
3. At the Open Configuration/Directory File screen, ensure that the
configuration file NMCONFIG.PUB.SYS appears as the configuration
file name. You want to open the file by pressing the Open Config
key.
4. The HP Configuration screen is displayed. At the Command prompt,
enter the direct path name as follows and then press the Enter
key:
@NETXPORT.NI. niname.PROTOCOL.ARP
where niname is the configured LAN NI name. The Address
Resolution Protocol (ARP) Config screen is displayed. The ARP
parameters are:
* Retransmission Maximum: The maximum number of times an ARP
request will be sent if no reply arrives.
Range: 1 to 10.
Default: 2
* Retransmission Timeout: The time (in seconds) between
retransmissions of ARP requests if no reply has arrived.
Range: 1 to 10
Default: 1
5. If you change any parameters, press the Save Data key. Next,
a. Hold down the Shift key and press the Tab key which returns
you to the command prompt.
b. At the command prompt, enter: validate, then press the
Enter key.
c. The Validate screen is displayed. Press the Validate
Netxport key to validate the updated configuration.
6. To exit the NMMGR program, hold down the Shift key and press the
Tab key which returns you to the command prompt. At the command
prompt, enter: EXIT, then press the Enter key.
7. If you changed any of the parameters, you need to restart the
network in order to activate the changed configuration file as
described later in this chapter under the heading, "Restarting the
Network."
Network Traffic
Enabling Ethernet on an MPE/iX system increases the number of broadcast
packets the system receives. If your installation has had network
traffic problems in the past, or you expect this increase in traffic to
affect your network performance, there are two things you can do:
* First, if the node is not a gateway, verify that the store and
forward feature has been disabled.
* Second, as part of an overall network plan, examine the MPE/iX
subnet feature as a means for managing network traffic.
Store and Forward.
Traffic problems may occur if you use the default configuration for store
and forward buffers. If the node you are updating is not a gateway node,
you can decrease network traffic by disabling store and forward.
Creating Subnets in a Network.
Subnetting is used to divide one large network into smaller subnetworks
(subnets). Subnets are configured using the IP subnet mask as described
below under "Update the IP Protocol Configuration."
Update the IP Protocol Configuration.
To enter an IP subnet mask for each node in the subnetwork and/or to
disable store and forward, do the following:
1. Run NMMGR.PUB.SYS
2. At the Open Configuration/Directory File screen, ensure that the
configuration file NMCONFIG.PUB.SYS appears as the configuration
file name. You want to open the file by pressing the Open Config
key.
3. The Main screen is displayed. At the Command prompt, enter the
direct path name as follows and then press the Enter key:
@NETXPORT.NI.niname.PROTOCOL.IP
where niname is the configured LAN NI that supports Ethernet.
4. From the IP Protocol Configuration screen , enter the IP subnet
mask you have selected for this subnetwork in the IP Mask field.
The subnet mask is specified in the same format as the IP address
without the preceding letter (A, B, or C). The 32-bit mask is
grouped in octets expressed as decimal integers and is delimited
by a period (.) or a space. (See the paragraph "Example: Subnet
Mask" later in this chapter.)
5. For a non-gateway node, you should disable store and forward
buffers.
Enter zero (0) in the Store & Forward Buffers field.
6. After you have finished updating the IP Protocol Configuration,
press the Save Data key. Next,
a. Hold down the Shift key and press the Tab key which returns
you to the command prompt.
b. At the command prompt, enter: validate, then press the
Enter key.
c. The Validate screen is displayed. Press the Validate
Netxport key to validate the updated configuration.
7. To exit the NMMGR program, hold down the Shift key which returns
you to the command prompt. At the command prompt, enter: EXIT,
then press the Enter key.
8. If you changed any of the parameters, you need to restart the
network in order to activate the changed configuration file as
described later in this chapter under the heading, "Restarting the
Network."
Example: Subnet Mask.
This example shows a network using class C IP addresses which has been
subnetted with the first three bits of the node address (in bold)
identifying the subnetwork. The IP addresses for two of the nodes in the
subnetwork are (in decimal and in binary):
192.006.012 041 1100 0000 0000 0110 0000 1100 0010 1001
192.006.012 055 1100 0000 0000 0110 0000 1100 0011 0111
A subnet mask for these two nodes is:
255.255.255 224 1111 1111 1111 1111 1111 1111 1110 0000
(note that the network address and the three bits identifying the subnet
bits are set to ones).
For this example, the decimal equivalent (255.255.255 224) is entered in
the IP Subnet Mask field.
Updating the Network Directory
For your installation, you may decide to provide users with NS node names
for remote systems that do not support probe. MPE/iX FTP users can enter
an NS node name instead of the IP address to connect to remote systems
which have been identified in the network directory. If you are using
ARPA domain names, refer to the subsection in this chapter called
"Configuring ARPA Domain Names."
The steps for updating the network directory are:
1. Run NMMGR.PUB.SYS
2. From the Open Configuration/Directory File screen, verify that the
Network directory file name displayed is NSDIR.NET.SYS, then press
the Open Directory key.
3. The Network Directory Main screen is displayed. Press the Update
Dir key to continue.
4. The Network Directory Select Node Name screen is displayed.
Enter a new node name at the Node name field, and select Y
or N for Global . The node name must be in the form:
nodename.domain.organization.
Press the Add key to proceed.
Each field in the node name must be 16 or fewer characters
starting with an alphabetic character.
5. The Network Directory Data screen is displayed. Enter the IP
address for the remote node you are adding to the network
directory, and select the correct type. Select type 1 (IP) for a
node that supports Ethernet using ARP.
For remote nodes that use Ethernet but do not support ARP, enter
the IP address and type 5 (LAN/ETHERNET). You must also enter the
LAN station address in the field, Additional Address (six
hexadecimal bytes, separated by dashes ( XX-XX-XX-XX-XX-XX)).
Under the heading Transport services, the field, Checksum for TCP
required (Y) or optional (N) must be set to yes (Y) for
multivendor communication. This will activate checksumming only
for the connection specified. Note that setting checksum to yes
in the network directory overrides a value of no set in the
Transmission Protocol Configuration (TCP) Screen (path
@NETXPORT.GPROT.TCP). HP recommends setting a no TCP checksum in
the TCP screen because a value of yes turns on checksum for all
connections (creating unnecessary overhead).
6. Press the Save Data key to save the new node name configuration.
7. To exit the NMMGR program, hold down the Shift key and press the
Tab key which returns you to the command prompt. At the command
prompt, enter: EXIT, then press the Enter key.
8. To activate the new network directory, you must restart the
network as described in the section, "Restarting the Network"
later in this chapter.