3Com 7600 manual Fast Ethernet Ports

Fast Ethernet Ports 11-5

Table 11-2Cable Support by Transceiver Type

Transceiver type	Cable type	Number of	Notes
		pairs (fibers)
100BASE-FX	62.5/125 μm	2	Same optics as
	multi-mode		FDDI, 2-km link
	fiber		span

Fast Ethernet Ports Ethernet LANs (Ethernet segments) are physically connected to the 7600 Card through one of its 16 Fast Ethernet ports. Each port has a unique address and port number. Figure 11-2 below shows Ethernet LANs connected to the 7600 Card Ethernet ports.

Figure 11-2Attaching Ethernet LANs to Ethernet ports on the 7600 Card

Disabling Ports Individual Ethernet ports can be enabled or disabled by management and the corresponding administrative status can be displayed. When a port is disabled, data is not received or transmitted through the port.

Monitoring Ports Each port is continuously monitored and the current operational status of the port (operating or not operating) can be displayed. Statistics on traffic through the port are compiled and can be displayed at any time. These include octets and frames (unicast, multicast, and broadcast) received and transmitted on the port, as well as discarded frames with the reason for discarding.