GarrettCom DS8016 - Manual (Page 21)

Magnum DS8016 Dual-Speed Stackable Hubs Installation and User Guide (07/06)
13
www GarrettCom com . .
Example 3 :
For additional expansion, DS8016s can be expanded by stacking DS8016-A “add-
on” units. The additional stacked ports are all auto-sensing dual-speed domain-switched, and
can be used at either 10Mb or 100Mb on a per-port basis.
The stacking cables connect the DS8016 units and carry the signals for both the
100Mb and the 10Mb domains. In a stack, all 10Mb ports are together in a 10Mb traffic
domain while all 100Mb ports are similarly together on a separate 100Mb traffic domain.
When one DS8016-B unit with a bridge inside is present in a stack, its bridge will support all
of the ports in the stack and enable network traffic to move between the two stacked
domains.
A Magnum DS8016 stack operates as one dual-speed repeater. A dual-speed
repeater is both a 10Mb hub and a 100Mb hub at the same time. This means that the 10Mb
traffic domain obeys all of the rules of 10Mb shared Ethernet networks (hop counts, cable
types, cable distances, etc.) and can be treated as one 10Mb repeater accordingly. Separately,
the 100Mb traffic domain obeys all of the rules of 100Mb Fast Ethernet shared networks (hop
counts, PDVs, cable types, cable distances, etc.) and can be treated as one 100Mb repeater.
Both traffic domains function within the same physical DS8016 hub or stack of hubs.
1 2 3 4 5 6 7 8 9 1 0 11 12 13 1 4 1 5 16 X
U PL I NK
L K/RX
P OR T 100 1 2 3 4 5 6 7 8 9 10 11 12 13 1 4 15 16
P W R B R
C OL 1 0
C OL 1 00
Magnum DS8016 Stackable Hub
1 2 3 4 5 6 7 8 9 1 0 11 12 13 1 4 1 5 16 X
U PL I NK
L K/RX
P OR T 100 1 2 3 4 5 6 7 8 9 10 11 12 13 1 4 15 16
P W R B R
C OL 1 0
C OL 1 00
Magnum DS8016 Stackable Hub
1 2 3 4 5 6 7 8 9 1 0 11 12 13 1 4 1 5 16 X
U PL I NK
L K/RX
P OR T 100 1 2 3 4 5 6 7 8 9 10 11 12 13 1 4 15 16
P W R B R
C OL 1 0
C OL 1 00
Magnum DS8016 Stackable Hub
A
A
B
10 Mb Hub
Figure 2.7.3 :
Stack of Magnum
DS8016’s operate
as one 10/100
dual-speed
repeater GA RR ET T 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2
10 10
10
10
Router
100
Server
10
X
U PLI N K
100
100
100
100
100
100
100
100
100
100 100
Print Server
10
When expanding
an Ethernet or Fast Ethernet installation, the Magnum DS8016 Hubs are ideally suited for
connecting servers and stations that have (or may have in the future) mixed speeds. Each
traffic domain or segment has its own local traffic with the Magnum DS8016-B performing
bridge-isolation of one domain from the other, filtering and selectively forwarding 10Mb and
100Mb packets between the two domains. This keeps the traffic between the domains to a
minimum and provides peak performance on both domains.