The chassis management card contains an 802.3 MAC and physical layer that can be used for management traffic. In some situations this interface may be inappropriate. For example in a Token Ring only environment it is appropriate to transmit management traffic directly onto the token ring network.

The MSH chassis provides the ability for the management card to use either its own MAC or to share the MAC provided by another card in the chassis. There may be a number of MACs available at any particular time from which the management card can choose. This table provides a summary of the available MACs and allows the manager to select one of those for current use.

Note: The table also includes the MAC actually present on the management card!