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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 | |
Subnetting is used to divide one large network into smaller
subnetworks (subnets). Subnets are configured using the IP subnet
mask as described 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: Run NMMGR.PUB.SYS. 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. 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. 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.) For a non-gateway node, you should disable store
and forward buffers. Enter zero (0) in the Store & Forward Buffers field. After you have finished updating the IP Protocol
Configuration, press the [Save Data] key. Next, Hold down the [Shift]
key and press the [Tab] key which returns you to
the command prompt. At the command prompt, enter: validate,
then press the [Enter] key. The Validate screen is displayed. Press the [Validate Netxport]
key to validate the updated configuration.
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. 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."
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