Industrial Managed
Ethernet Switch
User Manual
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137
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191
physical wires but by two additional network devices on each switch
.
There are two examples of U
-
Ring application
presented here to provide as guidelines when to choose this U
-
Ring feature
.
First example is depicted in Figure 2.153 where there are two EH75XX managed switches
.
On each switch it is
connected to two wireless Access Points (AP) via two different Ethernet LAN ports
.
Both wireless Access Points
are connected to another two wireless Access Points as two separate wireless bridge connection
.
Based on Figure
2.153, EH75XX A has AP 1 on port 8 and AP 3 on port 7 while EH75XX B has AP 2on port 7 and AP 4 on port 8
.
The AP 1 and the AP 2 are connected as wireless Bridge Connection 1 and the AP 4 and the AP 3 are connected
as wireless Bridge Connection 2
.
Figure 2.153 Example 1 of Two Wireless Bridge U
-
ring (Example made on EH7520)
Second example is illustrated in Figure 2.154 where there are also two EH75XX managed switches
.
On each switch
it is connected to two wired Access Points (AP) via two different Ethernet LAN ports
.
Both wired Access Points are
connected to another two wired Access Points as two separate wired bridge connection
.
Based on Figure 2.154,
EH75XX A has AP 1 on port 8 and AP 3 on port 7 while EH75XX B has AP 2 on port 7 and AP 4 on port 8
.
The AP
1 and the AP 2 are connected as wired Bridge Connection 1 and the AP 4 and the AP 3 are connected as wired
Bridge Connection 2
.
There are two physical lines between both pair of APs
.
The U
-
ring protocol could be used in
this environment
.
The different of this example from the previous example is that the AP
x
could be
:
Unmanaged
-
switch
Transceiver
XDSL bridge
Note that care should be taken that if a dumbswitch is used as an AP (
A
ccess
P
oint). The one on the other side
must be a dumbswitch as well
.
Again, care should also be taken when connecting the cables to the ports
.