HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 2 - LAN Switching Command Refer - Page 122

stp cost

Get HP 6125XLG PDF manuals and user guides View all HP 6125XLG manuals
Add to My Manuals
Save this manual to your list of manuals

Page 122 highlights

system-view [Sysname] interface fortygige 1/1/1 [Sysname-FortyGigE1/1/1] stp config-digest-snooping [Sysname-FortyGigE1/1/1] quit [Sysname] stp global config-digest-snooping Related commands • display stp • stp global config-digest-snooping stp cost Use stp cost to set the path cost of the port or ports. Use undo stp cost to restore the default. Syntax stp [ instance instance-list ] cost cost undo stp [ instance instance-list ] cost Default The device automatically calculates the path costs of ports in each spanning tree based on the corresponding standard. Views Ethernet interface view, aggregate interface view Predefined user roles network-admin Parameters instance instance-list: Sets the path cost of the ports in the MSTIs that are specified by an instance list, in the format of instance-list = { instance-id [ to instance-id ] }&, where & indicates that you can specify up to 10 instances or instance ranges. The value range for the instance-id argument is 0 to 4094, and the value 0 represents the CIST. cost: Specifies the path cost of the port, with an effective range that depends on the path cost calculation standard that is adopted. • When the IEEE 802.1d-1998 standard is selected for path cost calculation, the value range for the cost argument is 1 to 65535. • When the IEEE 802.1t standard is selected for path cost calculation, the value range for the cost argument is 1 to 200000000. • When the private standard is selected for path cost calculation, the value range for the cost argument is 1 to 200000. Usage guidelines Path cost is an important factor in spanning tree calculation. Setting different path costs for a port in MSTIs allows VLAN traffic flows to be forwarded along different physical links, which results in VLAN-based load balancing. The path cost setting of a port can affect the role selection of the port. When the path cost of a port is changed, the system calculates the role of the port and initiates a state transition. 115

  • 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
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
115
<Sysname> system-view
[Sysname] interface fortygige 1/1/1
[Sysname-FortyGigE1/1/1] stp config-digest-snooping
[Sysname-FortyGigE1/1/1] quit
[Sysname] stp global config-digest-snooping
Related commands
•
display stp
•
stp global config-digest-snooping
stp cost
Use
stp cost
to set the path cost of the port or ports.
Use
undo stp cost
to restore the default.
Syntax
stp
[
instance
instance-list
]
cost
cost
undo stp
[
instance
instance-list
]
cost
Default
The device automatically calculates the path costs of ports in each spanning tree based on the
corresponding standard.
Views
Ethernet interface view, aggregate interface view
Predefined user roles
network-admin
Parameters
instance
instance-list:
Sets the path cost of the ports in the MSTIs that are specified by an instance list, in
the format of
instance-list
= {
instance-id
[
to
instance-id
] }&<1-10>, where &<1-10> indicates that you
can specify up to 10 instances or instance ranges. The value range for the
instance-id
argument is 0 to
4094, and the value 0 represents the CIST.
cost
: Specifies the path cost of the port, with an effective range that depends on the path cost calculation
standard that is adopted.
•
When the IEEE 802.1d-1998 standard is selected for path cost calculation, the value range for the
cost
argument is 1 to 65535.
•
When the IEEE 802.1t standard is selected for path cost calculation, the value range for the
cost
argument is 1 to 200000000.
•
When the private standard is selected for path cost calculation, the value range for the
cost
argument is 1 to 200000.
Usage guidelines
Path cost is an important factor in spanning tree calculation. Setting different path costs for a port in
MSTIs allows VLAN traffic flows to be forwarded along different physical links, which results in
VLAN-based load balancing.
The path cost setting of a port can affect the role selection of the port. When the path cost of a port is
changed, the system calculates the role of the port and initiates a state transition.