H3c-technologies H3C WX5500E Series Access Controllers Manuel d'utilisateur Page 22
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11
Ste
p
Command
Remarks
5. Enter Ethernet interface view
or port group view.
• Enter Ethernet interface view:
interface interface-type
interface-number
• Enter port group view:
port-group manual
port-group-name
Use one of the commands.
To configure loopback detection
on one interface, enter Ethernet
interface view.
To configure loopback detection
on a group of Ethernet interfaces,
enter port group view.
6. Enable loopback detection on
the interface.
loopback-detection enable
By default, loopback detection is
disabled.
7. Enable loopback detection
control on a trunk port or a
hybrid port.
loopback-detection control enable
Optional.
By default, loopback detection
control is disabled.
8. Enable loopback detection in
all the VLANs on the trunk or
hybrid port.
loopback-detection per-vlan
enable
Optional.
By default, a trunk or hybrid port
performs loopback detection only
in its PVID.
9. Set the protective action to
take on the interface when a
loop is detected.
loopback-detection action
{ no-learning | semi-block |
shutdown }
Optional.
By default, when a loop is detected
on an interface, the interface does
not receive or send packets, and
the system generates traps and log
messages and deletes all MAC
address entries of the interface.
With the shutdown keyword
specified, the looped port is
automatically shut down and its
physical state changes to Loop
down. After the loop is removed,
use the undo shutdown command
on the port to recover its
forwarding capability.
Setting the MDI mode of an Ethernet interface
IMPORTANT:
Fiber ports do not support the MDI mode setting.
You can use both crossover and straight-through Ethernet cables to connect copper Ethernet interfaces.
To accommodate these types of cables, a copper Ethernet interface can operate in one of the following
Medium Dependent Interface (MDI) modes:
• Across mode
• Normal mode
• Auto mode
A copper Ethernet interface uses an RJ-45 connector, which comprises eight pins, each of which plays a
dedicated role. For example, pins 1 and 2 transmit signals, and pins 3 and 6 receive signals. The pin
role varies by the MDI modes as follows:
- H3C WX5540E Access Controller 1
- Switching Engine 1
- Preface 3
- Symbols 4
- Network topology icons 4
- Port numbering in examples 4
- Obtaining documentation 5
- Technical support 5
- Documentation feedback 5
- Contents 6
- Switch A Switch B 14
- Switch C 14
- Enabling auto power-down 17
- Bulk configuring interfaces 30
- Configuring MAC Information 39
- Operational key 44
- Configuration classes 44
- Reference port 44
- Link aggregation modes 45
- Choosing a reference port 46
- Configuring port isolation 63
- STP protocol packets 65
- Basic concepts in STP 66
- Path cost 67
- STP timers 71
- MSTP features 73
- MSTP basic concepts 73
- MST region 74
- Regional root 75
- Common root bridge 75
- Port roles 75
- How MSTP works 76
- STP configuration task list 78
- RSTP configuration task list 79
- PVST configuration task list 80
- MSTP configuration task list 81
- Configuring an MST region 82
- Configuring edge ports 89
- Performing mCheck 96
- Configuring digest snooping 97
- <DeviceB> system-view 99
- Configuration prerequisites 100
- Configuration procedure 100
- Configuration example 101
- Enabling BPDU guard 101
- Enabling root guard 102
- Enabling loop guard 102
- Enabling TC-BPDU guard 103
- Enabling BPDU drop 104
- MSTP configuration example 105
- PVST configuration example 109
- Configuring BPDU tunneling 113
- Enabling BPDU tunneling 116
- Network requirements 117
- Configuring VLANs 120
- VLAN frame encapsulation 121
- VLAN types 122
- Protocols and standards 122
- Configuring port-based VLANs 125
- Frame handling on a port 126
- Verifying the configuration 130
- Configuring MAC-based VLANs 131
- Configuration considerations 136
- Configuration guidelines 142
- Task Command 143
- Remarks 143
- Configuring super VLANs 144
- Name: VLAN 0005 148
- Tagged Ports: none 148
- Untagged Ports: 148
- Configuring voice VLANs 158
- VLAN assignment mode 162
- Configuring GVRP 169
- GARP timers 170
- GARP PDU format 171
- Introduction to GVRP 172
- GVRP registration modes 172
- GVRP configuration task list 173
- Configuring GVRP functions 173
- Configuring the GARP timers 174
- GVRP configuration examples 176
- Configuring LLDP 181
- LLDPDUs 182
- LLDP-MED TLVs 184
- Working mechanism 185
- LLDP configuration task list 186
- Enabling LLDP polling 188
- Configuring LLDP trapping 193
- LLDP configuration examples 194
- Overview 199
- Configuring MVRP 203
- MRP messages 204
- MRP timers 205
- MVRP configuration task list 206
- Enabling MVRP 207
- Configuring MRP timers 208
- Enabling GVRP compatibility 209
- Configuring Device B 212
- Configuring Device C 213
- Configuring Device D 214
- 1(default), 10 219
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