Black Box Modular Switches | Installation and User Guide (8/99) |
Example 3 : 16-port LE1416A
In another situation similar to Example 2 above, a larger central Switch is needed to provide for a 6-segment 100Mb fiber Fast Ethernet backbone, and switched copper support for 4 high speed local servers. In addition, the router and two dual-speed hubs need switched coppe ports. The total is 14 ports, 6 fiber and 8 copper.
The mixed-media flexibility of the Black-Box 4-Port Switches provides the user with more than one configuration in this case. The two ports not immediately used may be either fib or copper. If the probable growth of the central Switch is towards more fiber backbone segments, then two 4-port fiber 4PMs are selected to provide 6 required fiber ports and two fo spares and/or future backbone expansion. The 8 switched copper ports are handled with two R 45 4-Port Modules configured into the LE1416A. Should the number of servers expand, more than one server can be serviced by a switched LE1416A port by using a small 4-port 100Mbps hub.
If the probable growth of the central Switch is towards more local high speed servers and users, then one 4-port fiber 4PM is selected to provide 4 of the required fiber ports, and tw “combo 3 RJ-45 + 1 fiber” 4PMs are configured for the other 2 fiber ports plus 6 of the switch copper ports. Finally, an RJ-45 QPM is configured to provide for the remaining 2 copper ports plus two for spares and/or future expansion. Should the need arise to add a built -in-fiber backbone port in the future, the RJ-45 4PM could be removed and another “3+1 combo” 4PM installed in the field. Alternatively, a 100MB Media Converter (such as the LH1500A-ST-R2) may be used on a copper port, with internal jumpers (See Section 3.4) set to support fixed 100MB FDX on the RJ-45 port.
PWR | 100/10 | | | 100/10 | |
Black-Boxle1416a | 1 | LK | A C T | 1 | LK |
| | |
Modular Switch | 2 | | | 2 | |
| 3 | | | 3 | |
| 4 | | | 4 | |
| FDX/HDX | | | F D X / H D X | |
100Mb fiber segment
LK | A C T | LK |
10/100 | F D X / H D X | 10/100 |
Magnum DS8016 Stackable Hub | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
PWR BR | | | | | X | 1 |
C O L 1 0 | PLK/RXO R T 2 | 3 4 5 | 6 | 7 | 8 9 10 11 12 13 14 151216 | | 13 | 14 | 15 | 16 | | | | | | |
COL 100 | 1 0 0 | | | | UPLINK | | | | | | | | | | | |
Magnum DS8016 Stackable Hub | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
PWR BR | | X | 1 |
C O L 1 0 | LK/RX | 12 | | 13 | 14 | 15 | 16 | | | | | | |
P O R T 2 3 4 5 6 7 8 9 10 11 12 13 1 4 15 16 | | | | | | | | | | | |
C O L 1 0 0 | 1 0 0 | UPLINK | | | | | | | | | | | |
100Mb Servers
and Workstations
100Mb Workgroup
Fig 2.4c: LE1416A provides a 100Mb mixed-media backbone Switch.
