3 - 6 VM600 networking manual MAVM600-NET/E
Edition 9 - February 2018
Discovering the IP address of a CPUM card
SERIAL COMMUNICATIONS WITH A VM600 RACK
3- At the command prompt (/usr/user # ), type more net.cfg, then press ENTER to
continue. For example:
/usr/user # more net.cfg
The more command displays the contents of the specified text file one screen at a time.
If required, pressing ENTER or SPACEBAR displays the next n lines of text.
4- In the net.cfg file, the IP addresses of the network interfaces for the CPUM card are
displayed under #main network connection as net0_ipaddr (for the primary
network interface (ETH1)) and under #redundant network connection as
net1_ipaddr (for the secondary network interface (ETH2)).
3.4.2 About the net.cfg file
3.4.2.1 Example net.cfg file
#VM600 CPUM TCPIP Configuration
#main network connection
net0_ipaddr = 10.10.56.56
net0_netmask = 0xFFFFFF80
net0_force10Mb = 0
#redundant network connection
net1_ipaddr = 10.10.56.156
net1_netmask = 0xFFFFFF80
net1_force10Mb = 1
As shown in the example net.cfg file above:
•The net.cfg file requires netmasks in hexadecimal notation.
(Netmasks are typically written in either hexadecimal or dot-decimal notation, for
example, 0xFFFFFF80 or 255.255.255.128).
• The primary network interface (ETH1) can run at 100 Mbps, which is configured using
net0_force10Mb = 0.
• The secondary network interface (ETH2) must run at 10 Mbps, which is configured using
net1_force10Mb = 1.
NOTE: Only the primary network interface (ETH1) can run at 100 Mbps:
The secondary network interface (ETH2) is limited to 10 Mbps, in order to be
backwards compatible with older VM600 CPUM systems.
NOTE: Only the primary network interface (ETH1) can be used for PROFINET
communications.
The secondary network interface (ETH2) is limited to 10 Mbps, while the VM600
CPUM implements PROFINET IO which requires 100 Mbps.
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