Cabletron Systems switches User Manual

Ethernet

6-4

Ethernet Workgroup 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.

Again, the columns in Table 6-2 and 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 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.

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.

Table 6-2. Ethernet Workgroup Switches

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 

Fiber Optics

12

13

1 BRIM