Cabletron Systems switches, bridges manual Switched Devices, Switch Interfaces

Ethernet

Switched Devices

Ethernet segmentation and switching designs require some slightly different information and decisions. Several of the important factors to consider when selecting a segmentation-based workgroup scheme are listed along with the Cabletron Systems Ethernet switch products in Table 6-2,below.

Table 6-2. Ethernet Workgroup Switches

Name	Max	Media	Port Count	Switch	PIMs/BRIMs
	Management			Interfaces
NBR-220	SNMP	–	0	2	2 EPIMs
NBR-420	SNMP	–	0	4	4 EPIMs
NBR-620	SNMP	–	0	6	4 EPIMs
					2 BRIMs
FN10	SNMP	UTP	12/24	12/24	0
ESX-1320	RMON	UTP	12	13	1 BRIM
ESX-1380	RMON	Multimode	12	13	1 BRIM
		Fiber Optics

Again, the columns in Table 6-2and the values of each cell are important points to be considered in a network design. The Max Management, Media, and PIMs/BRIMs columns are defined in the same way as for shared Ethernet devices. The remaining two columns require some further treatment in terms of their relationship to Ethernet switches.

Port Count

Port Count indicates the number of fixed media ports there are on the device. In a case where a device has zero ports, it means that the device has no dedicated media ports, and all connections are made through user-configurable PIMs or BRIMs.

Switch Interfaces

The Switch Interfaces column indicates how many separate and distinct switched connections the Ethernet device is capable of recognizing. If multipoint media, such as coaxial cable, are connected to a switch interface, the Ethernet switch will switch only to that segment, not between individual stations on that segment.

6-4 Ethernet Workgroup Devices