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Duplex Mode The Ethernet supports half or full duplex communications. This setting will depend on
the device that is connected to the eCNA-10 (network switch, PC, etc.).
IP Address The IP address assigned to the unit can be modified. Change each octet of the address
by using the list box to select the desired number.
Subnet Mask The Subnet Mask assigned to the unit can be modified. Change each octet of the
mask by using the list box to select the desired number.
Gateway IP Address The Gateway IP address assigned to the unit can be modified. Change each
octet of the address by using the list box to select the desired number.
Multicast IP Multicast allows the eCNAs that belong to the multicast group to exchange status and
control information. The network infrastructure between all eCNAs must be multicast capable,
including intermediate routers. Multicast can be Enabled or Disabled. Multicast must be enabled
and configured in order to use the Network Monitor screen.
Multicast Time to Live Each IP Multicast packet uses a time-to-live (TTL) parameter. This
parameter controls the number of hops that a Multicast packet is allowed to propagate. Each time a
router forwards a packet it’s TTL is decremented. A Multicast packet whose TTL has expired (is 0) is
dropped, without an error notification to the sender. This mechanism prevents messages from
needless transmission to regions of a network that lie beyond the subnets containing the multicast
group members. This setting will depend on the physical network. You can adjust the range of
multicast propagations from 0 to 62.
Multicast Group IP Base Address Multicast addresses are in the range from 224.0.0.0 to
239.255.255.255. All eCNAs that are to belong to the same multicast group must have the same
Multicast Group IP Starting Address. A block of 30 addresses should be reserved for current and
future communications between eCNAs. For example, if you were to assign a starting address of
239.255.100.0, be sure that 239.255.100.0 to 239.255.100.30 are not being used for any other
multicast enabled devices. Change each octet of the address by using the list box to select the
desired number.
IP Multicast Address Ranges and Uses
Range Start Address Range End Address Description
224.0.0.0 224.0.0.255 Reserved for special “well-known” multicast addresses.
224.0.1.0 238.255.255.255 Globally-scoped (internet-wide) multicast addresses.
239.0.0.0 239.255.255.255 Administratively-scoped (local) multicast addresses.
Click on the Reset button to put the original data back. Click the Submit button to save new settings
to the eCNA-10.
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Note: Changes to the Duplex Mode, IP Address, Subnet Mask and Gateway IP
Address will not take effect until the eCNA-10 is re-booted. The eCNA can be re-booted
locally by cycling power with the front panel power switch or from the web browser by
clicking on the Start RTOS button from the Firmware Update screen.
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eCNA-10 Operation and Installation Manual Version 1.270-00
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