Dell PowerConnect 2848 User's Guide - Page 120

Default Path Cost, Path Cost 1-20

Get Dell PowerConnect 2848 PDF manuals and user guides View all Dell PowerConnect 2848 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 120 highlights

• Port State - The current port STP state. If enabled, the port state determines what forwarding action is taken on traffic. Possible port states are: - Disabled - The port link is currently down. - Blocking - The port is currently blocked and cannot be used to forward traffic or learn MAC addresses. Blocking is displayed when Classic STP is enabled. - Listening - The port is currently in the listening mode. The port cannot forward traffic nor can it learn MAC addresses. - Learning - The port is currently in the learning mode. The port cannot forward traffic however it can learn new MAC addresses. - Forwarding - The port is currently in the forwarding mode. The port can forward traffic and learn new MAC addresses. • Role - Displays the port role assigned by the STP algorithm to provide to STP paths. The possible field values are: - Root - Provides the lowest cost path to forward packets to the root switch. - Designated - Indicates the port or LAG through which the designated switch is attached to the LAN. - Alternate - Provides an alternate path to the root switch from the root interface. - Backup - Provides a backup path to the designated port path toward the Spanning Tree leaves. Backup ports occur only when two ports are connected in a loop by a point-to-point link, or when a LAN has two or more connections connected to a shared segment. - Disabled - The port is not participating in the Spanning Tree. • Speed - Speed at which the port is operating. • Path Cost (1-200000000) - The port contribution to the root path cost. The path cost is adjusted to a higher or lower value, and is used to forward traffic when a path being rerouted. • Default Path Cost - The default path cost of the port is automatically set by the port speed and the default path cost method. The default values for long path costs are: - Ethernet - 2000000 - Fast Ethernet - 200000 - Gigabit Ethernet - 20000 The default values for short path costs (short path costs are the default) are: - Ethernet - 100 - Fast Ethernet - 19 - Gigabit Ethernet - 4 120 Update with your book title

  • 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
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
120
Update with your book title
•
Port State
— The current port STP state. If enabled, the port state determines what forwarding action
is taken on traffic. Possible port states are:
–
Disabled
— The port link is currently down.
–
Blocking
— The port is currently blocked and cannot be used to forward traffic or learn MAC
addresses. Blocking is displayed when Classic STP is enabled.
–
Listening
— The port is currently in the listening mode. The port cannot forward traffic nor can it
learn MAC addresses.
–
Learning
— The port is currently in the learning mode. The port cannot forward traffic however it
can learn new MAC addresses.
–
Forwarding
— The port is currently in the forwarding mode. The port can forward traffic and learn
new MAC addresses.
•
Role
— Displays the port role assigned by the STP algorithm to provide to STP paths. The possible
field values are:
–
Root
— Provides the lowest cost path to forward packets to the root switch.
–
Designated
— Indicates the port or LAG through which the designated switch is attached to the
LAN.
–
Alternate
— Provides an alternate path to the root switch from the root interface.
–
Backup
— Provides a backup path to the designated port path toward the Spanning Tree leaves.
Backup ports occur only when two ports are connected in a loop by a point-to-point link, or when a
LAN has two or more connections connected to a shared segment.
–
Disabled
— The port is not participating in the Spanning Tree.
•
Speed
— Speed at which the port is operating.
•
Path Cost (1-200000000)
— The port contribution to the root path cost. The path cost is adjusted to
a higher or lower value, and is used to forward traffic when a path being rerouted.
•
Default Path Cost
— The default path cost of the port is automatically set by the port speed and the
default path cost method.
The default values for long path costs are:
–
Ethernet
- 2000000
–
Fast Ethernet
- 200000
–
Gigabit Ethernet
- 20000
The default values for short path costs (short path costs are the default) are:
–
Ethernet
- 100
–
Fast Ethernet
- 19
–
Gigabit Ethernet
- 4