Nortel Networks 450 manual describes the Port Mirroring Configuration screen fields

Using the BayStack 450 10/100/1000 Series Switch

Table 3-17 describes the Port Mirroring Configuration screen fields.

Table 3-17.	Port Mirroring Configuration Screen Fields
Field		Description
Monitoring Mode		Allows a user to select any one of six port-based monitoring modes or any one of five
		address-based monitoring modes (see Table 3-18). Selecting any one of the six
		port-based modes activates the port X and port Y screen fields, where a user can
		choose up to two ports to monitor. Selecting any one of the five address-based
		modes activates the Address A and Address B screen fields, where a user can
		specify MAC addresses to monitor.
		Default Value	Disabled
		Range	See Table 3-18
Monitor Unit/Port		Indicates the port number (of the specified unit) that is designated as the monitor
		port.
		Default Value	Zero-length string
		Range	1 to 8/ 1 to 28 (depending on model type)
Unit/Port X		Indicates one of the ports (of the specified unit) that will be monitored by the
		designated port monitor when one of the port-based monitoring modes is selected.
		This port will be monitored according to the value of Port X in the Monitoring Mode
		field (see Table 3-18).
		Default Value	Zero-length string
		Range	1 to 8/ 1 to 28 (depending on model type)
Unit/Port Y		Indicates one of the ports (of the specified unit) that will be monitored by the
		designated port monitor when one of the port-based monitoring modes is selected.
		When installed as a standalone switch, the screen does not display the (Unit/) field
		designation. This port will be monitored according to the value of Port Y in the
		Monitoring Mode field (see Table 3-18).
		Default Value	Zero-length string
		Range	1 to 8/ 1 to 28 (depending on model type)
Address A		Indicates the MAC addresses that will be monitored by the designated port monitor
		when one of the address-based monitoring modes is selected. This port will be
		monitored according to the value of Address A in the selected Monitoring Mode field
		(see Table 3-18). Users can enter the MAC address from this screen or from the MAC
		Address Table screen. The entry is displayed and can be modified by either screen
		(see “MAC Address Table” on page 3-20).
		Default Value	00-00-00-00-00-00 (no MAC address assigned)
		Range	00-00-00-00-00-00 to FF-FF-FF-FF-FF-FF
			(continued)

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