3Com 3CBLSF50 User Guide - Page 77

If the Problem Persists, The Link/Activity LED is on, but network, performance is poor

Get 3Com 3CBLSF50 - Baseline Switch 2250 PDF manuals and user guides
UPC - 662705529103
View all 3Com 3CBLSF50 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 77 highlights

The Link/Activity LED is on, but network performance is poor The Switch supports full-duplex autonegotiation. If the connected device does not support autonegotiation, ensure that it is configured for half-duplex operation only. If the connected device has autonegotiation disabled or overridden, and is configured as full-duplex, the Switch will configure the link as half-duplex, causing a mismatch that will reduce network performance when data is transmitting and receiving simultaneously on the same link. Ensure that the connected device has either: ■ Autonegotiation enabled, or ■ The ports are configured for half-duplex operation All ports appear to show continual activity. There may be broadcast storms on the network. Remove port connections one at a time, waiting a few seconds between each port. If the LEDs go off after removing a port connection, the device that was connected to that port is introducing an excessive amount of broadcast frames to the network. Some pieces of network equipment operate by sending out broadcast frames regularly. Refer to the documentation that accompanies the device for information on disabling the broadcast operation. If the Problem Persists 77 If the Problem Persists If the problem persists and the unit still does not operate successfully, contact your 3Com network supplier with the following information before returning the unit: ■ Product number and serial number (printed on a label supplied with the unit). ■ A brief description of the issue

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
If the Problem Persists
77
The Link/Activity LED is on, but network
performance is poor
The Switch supports full-duplex autonegotiation. If the
connected device does not support autonegotiation,
ensure that it is configured for half-duplex operation
only. If the connected device has autonegotiation dis-
abled or overridden, and is configured as full-duplex,
the Switch will configure the link as half-duplex, caus-
ing a mismatch that will reduce network performance
when data is transmitting and receiving simultaneously
on the same link.
Ensure that the connected device has either:
■
Autonegotiation enabled, or
■
The ports are configured for half-duplex operation
All ports appear to show continual activity.
There may be broadcast storms on the network.
Remove port connections one at a time, waiting a few
seconds between each port. If the LEDs go off after
removing a port connection, the device that was con-
nected to that port is introducing an excessive amount
of broadcast frames to the network. Some pieces of
network equipment operate by sending out broadcast
frames regularly.
Refer to the documentation that accompanies the
device for information on disabling the broadcast
operation.
If the Problem Persists
If the problem persists and the unit still does not oper-
ate successfully, contact your 3Com network supplier
with the following information before returning the
unit:
■
Product number and serial number (printed on a
label supplied with the unit).
■
A brief description of the issue