AT-9000/24 Gigabit Ethernet Switch Installation Guide
27
Collapsed
Backbone
In the topology illustrated in Figure 5, an AT-9000/24 Gigabit Ethernet
Switch connects Fast Ethernet switches that have 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.
Figure 5. Collapsed Backbone - Hub Topology
Legend
100 Mbps
1000 Mbps
10 Mbps
AT-8000/8POE
8 Port POE Fast Ethernet Switch
PoE
9
9R
1
3
5
7
2
4
6
8
TERMINAL POR
T
1
3
5
7
2
4
6
8
9
9R
POWER
10/100/1000 Base-T
SFP
UPLINK PORT
RS-232
DET ON ON
100 LINK ACT
10 LINK ACT
PD ON
MAX CURRENT
PD ERR
10/100 LINK
1000 LINK
ACT
ACT
CLASS 1
LASER PRODUCT
MAIN PORT ACTIVITY
UPLINK PORT ACTIVITY
820
560
M
0
0
1
T
C
A
/
K
N
I
L
X
D
F
R
E
W
O
P
2
8
/
0
0
9
S
G
-
T
A
h
c
t
i
w
S
t
e
n
r
e
h
t
E
t
i
b
a
g
i
G
T
-
E
S
A
B
0
0
0
1
/
0
0
1
/
0
1
M
0
1
M
0
0
0
1
1
3
4
5
8
7
6
2
1
3
4
5
6
7
8
LINK/ACT
SPEED
LINK/ACT
SPEED
POWER
15
16
LINK/ACT
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
AT-GS950/16
16-Port 10/100/10 2 SFP Combo WebSmart Switch
731
AT-GS950/16 Switch
AT-GS900/8 Switch
AT-8000/9POE Switch
793
AT-9000/24
24 Port Gigabit Ethernet Switch
1
3
5
7
9
11
13
15
17
19 21R 23R
2
4
6
8
10
12
14
16
18
20 22R 24R
POWER
21
22
23
24
SFP
LINK
ACT
1000
10/100
PORT ACTIVITY
301
Wireless Network
Summary of Contents for AT-9000/24
Page 1: ...613 000239 Rev A Layer 2 Gigabit Ethernet Switch AT 9000 24 Installation Guide...
Page 6: ...Contents 6 Appendix B Translated Safety Statements 53...
Page 8: ...Figures 8...
Page 10: ...Tables 10...
Page 28: ...Chapter 1 Overview 28...
Page 46: ...Chapter 2 Installation 46...
Page 48: ...Chapter 3 Troubleshooting 48...
Page 52: ...Appendix A Technical Specifications 52...
Page 74: ...Appendix B Translated Safety Statements 74 1 1 2 3 LAN 4 5 6 I 7 8 9 40 C 10 11 15 LAN OFF 12...
