Visara CNA-8000 Installation - Manual (Page 76)

Chapter 6. Ethernet Gateway
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Field Definitions
Configure Ethernet Line: This dropdown control allows you to select a different
Ethernet interface to configure.
Line ID: This is the name that you choose to use for the Ethernet interface.
Mac Address: This field indicates the MAC address assigned to this Ethernet interface.
If the ‘Use Burned in MAC Address’ option is selected this field will display the
hardware assigned MAC address and the field will be grayed out so that you can not
change the value. If the option is not selected, then you may enter a locally-administered
MAC address value. Entered values should consist of 6 hex bytes separated by colons.
Example: 02:00:01:75:B3:02
Duplicating a MAC address may cause one or both platforms to stay off the network, or
could cause other errors. The selection of this address is important.
If the CNA-8000 is replacing an existing 37x5 FEP or a Token Ring gateway product, the
downstream platforms that are communicating to that product, include in their
configurations the Token Ring address of that gateway/FEP product. To avoid having to
reconfigure all of those platforms, you may want to set the Ethernet address of the CNA-
8000 to that same address. You can not typically however, replace a Token Ring address
directly with the same address on an Ethernet card. This is due to Ethernet and Token
Ring designating the high order bit in complete opposition to each other. You must
therefore convert the existing Token Ring address to an Ethernet address using a bit
swapping algorithm. Refer to the section discussing ‘Bit-Swapping LAN Addresses’
below.