physical description 2-3
Note:
Using Auto Uplink to create multiple active paths between any two network
devices can cause undesirable loops in the network, resulting in an endless broadcast
traffic that disables your network. Loops occur when there are alternate routes
between two network devices. In Figure 2-3, for example, a loop is created by con-
necting two RJ-45 ports on a GS516T Switch to a router containing a 4-port
switch. Figure 2-4 shows another scenario where a router with a 4-port switch con-
nects to a hub and to a GS516T Switch; the hub and switch, in turn, connect back
to the same router, creating multiple active paths between all three devices.
Figure 2-3. Warning! Creating loops disables your network(Example 1)
Figure 2-4. Warning! Creating loops disables your network(Example 2)
Model GS516T
FR314 Router
16
PORT
GS516T
8
16
1
9
1
2
3
4
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
Gree=FDX Yellow=COL
Blinking=Adfity on=10MLink
5
6
7
8
9
10
11
12
13
14
15
16
"
Figure 2-5
FR314 Router
Model GS516T
FS509T
MODEL
9
PORTS
Fast Ethernet Switch
with Ports
10/100Mbps
Switching
Power
9
2
3
4
1
6
7
8
5
Activity
Green = FDX, Yellow = COL
100M
10M
On = Link
1000M
100M
9
8
7
6
5
4
3
2
1
1000M
100M
®
On = Link
EN524 Hub
EN524
MODEL
®
