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Chapter 1: Overview
Collapsed
Backbone
AT-8000/8POE
AT-8000/8POE
1
3
5
7
MAIN PORT ACTIVITY
DET ON ON
8 Port POE Fast Ethernet Switch
PD ON
PD ERR
MAX CURRENT
100 LINK
ACT
10 LINK
ACT
PoE
9
UPLINK PORT ACTIVITY
1000 LINK
ACT
POWER
10/100 LINK
ACT
2
4
6
8
9R
301
Wireless Network
30
In the topology illustrated in Figure 5, an AT-9424T Gigabit Ethernet
Switch forms the backbone that connects to servers and AT-8000/8POE
Fast Ethernet switches using Gigabit Ethernet uplinks. This type of
topology is often referred to as a collapsed backbone topology. The switch
functions as the focal point of the network and transfers an Ethernet frame
between the Fast Ethernet switches only when the destination end node
for the frame is on a different switch than the end node that originated the
frame. This reduces the amount of unnecessary data traffic in each
workgroup, freeing up bandwidth and improving network performance.
AT-9424T
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
1
3
5
7
UPLINK PORT
10/100/1000 Base-T
SFP
CLASS 1
LASER PRODUCT
2
4
6
8
9R
9
820
Figure 5. Collapsed Backbone Topology
17
19
21R
23R
CLASS 1
LASER PRODUCT
SFP
18
20
22R
24R
21
22
23
24
AT-8000/8POE
AT-8000/8POE
8 Port POE Fast Ethernet Switch
PoE
POWER
AT-9424T
PORT ACTIVITY
SFP
1000 LINK /
ACT
10/100 LINK /
ACT
L/A
D/C
FDX
HDX /
COL
1
3
5
7
9
11
13
15
17
19 21R 23R
L/A
D/C
L/A
D/C
2
4
6
8
10
12
14
16
18
20 22R 24R
1
3
5
7
1
3
5
7
MAIN PORT ACTIVITY
DET ON ON
PD ON
PD ERR
MAX CURRENT
100 LINK
ACT
10 LINK
ACT
9
UPLINK PORT ACTIVITY
1000 LINK
ACT
CLASS 1
10/100 LINK
ACT
LASER PRODUCT
2
4
6
8
9R
2
4
6
8
Legend
10 Mbps
100 Mbps
1000 Mbps
Gigabit Ethernet Switch
TERMINAL
STATUS
PORT
L/A
21
FAULT
22
MASTER
23
24
POWER
1282
UPLINK PORT
10/100/1000 Base-T
SFP
9R
9
820
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