NETGEAR FS 524S - Manual (Page 22)

physical description 2-6
Note: Using Auto Uplink to create multiple active paths between any two net
work 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 connecting two RJ-45 ports on an FS517TS Switch to a
router containing a 4-port switch. Figure 2-4 shows another scenario where a
router with a 4-port switch connects to a hub and to a FS517TS 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)
Model FS517 TS Switch
FR314 Router