ADC Home > Reference Library > Technical Q&As > Legacy Documents > Networking >
Important: This document is part of the Legacy section of the ADC Reference Library. This information should not be used for new development.
Current information on this Reference Library topic can be found here:
Q: Is there an Ethernet-driver-interface
I can use the
A: The number of addresses you can set up for multicast is limited. The size of the limit depends on the driver you are dealing with (i.e., Apple, Asante, etc). This limit is a function of the number of CAM locations the Ethernet controller supports. Controllers with a SONIC chip support six CAM locations, so with these controllers, the limit on multicast addresses is six.
Q: I need the ability to set the interface to "promiscuous" mode, where all (multicast and unicast) addresses are received.
A: Our Ethernet driver does not support promiscuous mode. The only way to enable promiscuous mode is to write your own Ethernet driver to support promiscuous mode only. This is no easy task, in that you need to know about every network interface card that exists if you need to support them all.
There is also a performance issue with promiscuous mode, as it is very interrupt-intensive. If you are on a busy network, promiscuous-mode operation would require a very fast Macintosh.