3Com 100 TX Switch User Manual


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3-10 CHAPTER 3: MAKING FMS 100-TX HUB CONNECTIONS
Class II Repeaters A Class II repeater is a hub with internal delay such that no more than two
hubs can exist between any two DTE devices within a single collision domain
when two maximum-length cable segments are used. The Class II network
topology allows two hubs (or hub stacks) to exist between any two end
stations.
Figure 3-9 shows a two-repeater collision domain containing two hubs
between two end stations that are located 205 meters apart. This is the total
allowable span for UTP cable.
Figure 3-9 Class II Hubs
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100BT STATUS
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3C12345
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LinkBuilder
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EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
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ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
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FAN FAIL
OVERTEMP
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LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
®
LinkBuilder
R
EPEATER
1x 1x 1x 1x 1x 1x 1x
100BT STATUS
1x 1x 1x 1x 1x
12345678910111213
ACTIVITY
UNIT
LINE
PARTITION
CLS2
3C12345
CLS1
PWR
FAN FAIL
OVERTEMP
COLLISION
Class II configuration
205 meters: maximum UTP distance
5 meters maximum100 meters maximum 100 meters maximum
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