Syntax
broadcast-suppression ratio
undo broadcast-suppression
View
System view or Ethernet port view
Parameter
ratio: Specifies
the allowed maximum ratio of the broadcast traffic to the total bandwidth on one
or each port. The value ranges form 1 to 100 and defaults to 100. The smaller
the ratio is, the smaller the broadcast traffic is allowed.
Description
Use the broadcast-suppression
command to define the broadcast traffic ratio allowed on one port or each of
the ports.
Use the undo broadcast-suppression
command to restore the default ratio.
l
When you execute the command here in system
view, the command takes effect on all ports.
l
When you execute the command here in Ethernet port
view, the command takes effect only on the current port.
Once broadcast traffic exceeds the value
set by the user, the system maintains an appropriate broadcast traffic ratio by
discarding the overflow traffic, so as to suppress broadcast storm, avoid network
congestion and ensure normal network services.
By default, broadcast suppression is
disabled.
Example
# Allow the broadcast traffic passing
through the Ethernet1/0/1 port to occupy at most 20% of the bandwidth.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1]
broadcast-suppression 20
Syntax
copy configuration source { interface-type interface-number | aggregation-group
source-agg-id } destination { interface-list [ aggregation-group
destination-agg-id ] | aggregation-group destination-agg-id
}
View
System view
Parameter
interface-type:
Port type.
interface-number: Port number.
source-agg-id: Source aggregation group number, in the range of 1 to 26. The port
with the smallest port number in the aggregation group is used as the source
port.
interface-list: Destination port list, interface-list = { interface-type
interface-number } [ to interface-type interface-number ]
&<1-10. &<1-10> means that you can enter the former parameter
ten times at most.
destination-agg-id: Destination aggregation group number, in the range of 1 to 26.
Description
Use the copy configuration command
to copy the configuration on a specified port to other ports to keep consistent
configuration on them.
l
If you specify the source aggregation group ID,
the system uses the port with the smallest port number in the aggregation group
as the source.
l
If you specify the destination aggregation ID,
the configuration of the source port will be copied to all ports in the
aggregation group.
Example
# Copy the configuration of aggregation
group 1 to all ports in aggregation group 2.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] copy configuration source
aggregation-group 1 destination aggregation-group 2
Syntax
description text
undo description
View
Ethernet port view
Parameter
text: Port
description, a string of up to 80 characters.
Description
Use the description command to set a
port description string.
Use the undo description command to
remove the port description string.
By default, no description is defined for a
port.
Example
# Set Ethernet1/0/1 description lanswitch-interface.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] description lanswitch-interface
Syntax
display brief interface [ interface-type interface-number ] [ | { begin
| include | exclude } string ]
View
Any view
Parameter
interface-type: Port type.
interface-number:
Port number.
|: Used to describe the details of
configuration information entries to be displayed.
begin: Each
entry must begin with a specified character string.
include:
Each entry must include a specified character string.
exclude: Each
entry must not include a specified character string.
string: A
character string of 1 to 256 characters.
Description
Use the display brief interface
command to display the brief configuration information about one or all
interfaces, including: interface type, link state, link rate, duplex attribute,
link type, and default VLAN ID.
This command is similar to the display
interface command, but the information it displays is briefer.
Currently, for the
port types other than Ethernet port, this command only displays the link state,
and shows "--" in all other configuration information fields.
Related command: display interface.
Example
# Display the brief configuration
information about the Ethernet1/0/3 port.
<H3C> display brief interface ethernet
1/0/3
Interface Link Speed
Duplex Link-type PVID
Ethernet1/0/3 DOWN auto
auto access 1
Table 1-1 Description
on the fields of the display brief interface command
|
Field
|
Description
|
|
Interface
|
Port type
|
|
Link
|
Link state: UP or DOWN
|
|
Speed
|
Link rate
|
|
Duplex
|
Duplex attribute
|
|
Link-type
|
Link type: access, hybrid or trunk
|
|
PVID
|
Default VLAN ID
|
Syntax
display interface
[ interface-type | interface-type interface-number ]
View
Any view
Parameter
interface-type:
Port type.
interface-number: Port number.
Description
Use the display interface command to
display port configuration.
l
If you specify neither port type nor port
number, the command displays information about all ports.
l
If specify only port type, the command displays
information about all ports of this type.
l
If specify both port type and port number, the command
displays information about the specified port.
Example
# Display the configuration information of
the Ethernet1/0/1 port.
<H3C> display interface ethernet1/0/1
Ethernet1/0/1 current state : DOWN
IP Sending Frames' Format is
PKTFMT_ETHNT_2, Hardware address is 000f-e20f-3f1
The Maximum Transmit Unit is 1500
Media type is twisted pair, loopback
not set
Port hardware type is 100_BASE_TX
Unknown-speed mode, unknown-duplex
mode
Link speed type is autonegotiation,
link duplex type is autonegotiation
Flow-control is not enabled
The Maximum Frame Length is 1536
Broadcast-suppression ratio(%): 100
Allow jumbo frame to pass
PVID: 1
Mdi type: auto
Port link-type: access
Tagged VLAN ID : none
Untagged VLAN ID : 1
Last 300 seconds input: 0
packets/sec 0 bytes/sec
Last 300 seconds output: 0
packets/sec 0 bytes/sec
Input(total): 0 packets, 0 bytes
- broadcasts, - multicasts
Input(normal): 0 packets, 0 bytes
0 broadcasts, 0 multicasts
Input: 0 input errors, 0 runts, 0
giants, 0 throttles, 0 CRC
0 frame, - overruns, -
aborts, - ignored, - parity errors
Output(total): 0 packets, 0 bytes
- broadcasts, - multicasts,
- pauses
Output(normal): 0 packets, 0 bytes
0 broadcasts, 0 multicasts,
0 pauses
Output: 0 output errors, - underruns,
- buffer failures
- aborts, 0 deferred, 0
collisions, 0 late collisions
- lost carrier, - no carrier
Table 1-2 Description on the fields of
the command
|
Field
|
Description
|
|
Ethernet1/0/1 current state
|
Current Ethernet port state
|
|
IP Sending Frames' Format
|
Ethernet frame format
|
|
Hardware address
|
Port hardware address
|
|
The Maximum Transmit Unit
|
Maximum transmit unit
|
|
Media type
|
Media type
|
|
Port hardware type
|
Port hardware type
|
|
Flow-control is not enabled
|
Port flow control state
|
|
The Maximum Frame Length
|
The maximum frame length allowed on the
port
|
|
Broadcast-suppression ratio(%)
|
Port broadcast suppression ratio
|
|
Allow jumbo frame to pass
|
Jumbo frame allowed on the port
|
|
PVID
|
Default VLAN ID for the port
|
|
Mdi type
|
Network cable type
|
|
Port link-type
|
Port link type
|
|
Tagged VLAN ID
|
Assign tags to packets of which VLANs on
the port.
|
|
Untagged VLAN ID
|
Do not assign tags to packets of which VLANs
on the port.
|
|
Last 300 seconds input: 0 packets/sec 0
bytes/sec
Last 300 seconds output: 0 packets/sec 0
bytes/sec
|
Rate and number of incoming and outgoing
packets in the last 300 seconds
|
|
Input(total): 0 packets, 0 bytes
- broadcasts, - multicasts
Input(normal): 0 packets, 0 bytes
0 broadcasts, 0 multicasts
Input: 0 input errors, 0 runts, 0
giants, 0 throttles, 0 CRC
0 frame, - overruns, - aborts,
- ignored, - parity errors
Output(total): 0 packets, 0 bytes
- broadcasts, - multicasts, -
pauses
Output(normal): 0 packets, 0 bytes
0 broadcasts, 0 multicasts, 0
pauses
Output: 0 output errors, - underruns, -
buffer failures
- aborts, 0 deferred, 0 collisions,
0 late collisions
- lost carrier, - no carrier
|
Statistics on the incoming and outgoing
packets and errors on the port
|
Syntax
display loopback-detection
View
Any view
Parameter
None
Description
Use the display loopback-detection
command to display the loopback detection status on the port. If loopback
detection is enabled, this information will also be displayed: time interval
for loopback detection and the loopback ports.
Example
# Display the loopback detection status on the
port.
<H3C> display
loopback-detection
Port Ethernet1/0/1 loopback-detection
is running
System Loopback-detection is running
Detection interval time is 30 seconds
There is no port existing loopback
link
Table 1-3 Description on the fields of
the command
|
Field
|
Description
|
|
Port Ethernet1/0/1 loopback-detection is
running
|
Loopback detection is enabled on the
port.
|
|
System Loopback-detection is running
|
Loopback detection is enabled globally.
|
|
Detection interval time is 30 seconds
|
Time interval for loopback detection is
30 seconds.
|
|
There is no port existing loopback link
|
No loopback port exists.
|
Syntax
display port
{ hybrid | trunk | combo }
View
Any view
Parameter
hybrid:
Displays hybrid ports.
trunk:
Displays trunk ports.
combo: Displays
combo ports.
Description
Use the display port command to
display the configuration of the specified port.
Example
# Display existing hybrid ports.
<H3C> display port hybrid
Now, the following hybrid ports
exist:
Ethernet1/0/1
Ethernet1/0/2
The above information shows that
Ethernet1/0/1 and Ethernet1/0/2 are two hybrid ports.
Syntax
duplex {
auto | full | half }
undo duplex
View
Ethernet port view
Parameter
auto:
Auto-negotiation mode
full: Full
duplex mode
half: Half
duplex mode
Description
Use the duplex command to set port
duplex attribute.
Use the undo duplex command to
restore the default duplex mode (auto).
By default, a port is in auto duplex
mode.
Related command: speed.
Example
# Set the Ethernet1/0/1 port in auto
duplex mode.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] duplex auto
Syntax
flow-control
undo flow-control
View
Ethernet port view
Parameter
None
Description
Use the flow-control command to
enable port flow control, to avoid packet loss in the event of network
congestion.
Use the undo flow-control command to
disable flow control on the port.
By default, port flow control is disabled.
Example
# Enable flow control on the Ethernet1/0/1
port.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] flow-control
Syntax
interface interface-type
interface-number
View
System view
Parameter
interface-type:
Port type.
interface-number: Port number, in the format of slot number/subslot number/port
number.
Description
Use the interface command to enter
Ethernet port view. To configure parameters for a port, you must enter the port
view first.
Example
# Enter Ethernet1/0/1 port view.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
Syntax
giant-frame statistics enable
undo giant-frame statistics enable
View
System view
Parameter
None
Description
Use the giant-frame statistics enable
command to enable the giant-frame statistics function.
Use the undo giant-frame statistics
enable command to disable the giant-frame statistics function.
By default, the giant-frame statistics
function is not enabled.
Example
# Enable the giant-frame statistics
function.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] giant-frame statistics enable
Syntax
loopback {
external | internal }
View
Ethernet port view
Parameter
external:
Performs external loop test. In the external loop test, self-loop headers
(which are made from four cores of the 8-core cables) must be used on the port
of the switch. The external loop test can locate the hardware failures on the
port.
internal:
Performs internal loop test. In the internal loop test, self loop is
established in the switching chip to locate the chip failure which is related
to the port.
Description
Use the loopback command to perform
a loopback test on the current Ethernet port to check whether the Ethernet port
works normally. The loopback test terminates automatically after running for a
specific period.
By default, no loopback test is performed
on the Ethernet port.
Example
# Perform an internal loop test on
Ethernet1/0/1.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet 1/0/1
[H3C-Ethernet1/0/1] loopback internal
Loopback internal succeeded.
Syntax
loopback-detection control enable
undo loopback-detection control enable
View
Ethernet port view
Parameter
None
Description
Use the loopback-detection control
enable command to enable loopback port control on the current trunk or
hybrid port.
Use the undo loopback-detection control
enable command to disable loopback port control.
l
When the loopback port control function is enabled
on the trunk or hybrid port and loopback is found on the port, the system
disables the port, sends a Trap message to the client and removes the corresponding
MAC forwarding entry.
l
When the loopback port control function is
disabled, the system sends a Trap message to the client if a loopback port is
found. The port still operates normally.
By default, the loopback port control
function is disabled on the trunk or hybrid port.
Caution:
This command is
invalid for the access port, since the loopback port control function is always
enabled on the access port.
Example
# enable loopback port control on the Ethernet1/0/1
trunk port.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] loopback-detection enable
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1]
loopback-detection enable
[H3C-Ethernet1/0/1]
loopback-detection control enable
Syntax
loopback-detection enable
undo loopback-detection enable
View
System view, Ethernet port view
Parameter
None
Description
Use the loopback-detection enable
command to enable loopback detection globally or on current port.
Use the undo loopback-detection enable
command to disable loopback detection globally or on current port.
Caution:
l
To enable loopback detection on a specific port,
you must use the loopback-detection enable command in both system view
and the current port view.
l
After you use the undo loopback-detection enable
command in system view, loopback detection will be disabled on all ports.
l
If loopback is found on an access port, the
system disables the port, sends a Trap message to the client and removes the corresponding
MAC forwarding entry.
l
If loopback is found on a trunk or hybrid port, the
system sends a Trap message to the client. When the loopback port control
function is enabled on these ports, the system disables the port, sends a Trap
message to the client and removes the corresponding MAC forwarding entry.
By default, loopback port control is disabled.
Related command: loopback-detection
control enable.
Example
# Enable loopback detection on the Ethernet1/0/1
port.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] loopback-detection enable
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1]
loopback-detection enable
Syntax
loopback-detection interval-time time
undo loopback-detection interval-time
View
System view
Parameter
time: Time
interval for loopback detection, in the range of 5 to 300 (seconds). It
defaults to 30 seconds.
Description
Use the loopback-detection interval-time
command to set time interval for loopback detection.
Use the undo loopback-detection
interval-time command to restore the default time interval.
Related command: display
loopback-detection.
Example
# Set time interval for loopback detection
to 10 seconds.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] loopback-detection
interval-time 10
Syntax
loopback-detection per-vlan enable
undo loopback-detection per-vlan enable
View
Ethernet port view
Parameter
None
Description
Use the loopback-detection per-vlan
enable command to configure the system to run loopback detection on all VLANs
for the current trunk or hybrid ports.
Use the undo loopback-detection per-vlan
enable command to restore the default setting.
By default, the system runs loopback
detection only on the default VLAN for the trunk or hybrid ports.
Caution:
This command is
invalid for the access port.
Example
# Configure the system to run loopback
detection on all VLANs for the Ethernet1/0/1 trunk port.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1]
loopback-detection per-vlan enable
Syntax
mdi {
across | auto | normal }
undo mdi
View
Ethernet port view
Parameter
across: Sets
the port to support MDIX.
auto: Sets the
port to support auto-MDI/MDIX.
normal: Sets
the port to support MDI.
Description
Use the mdi command to set port MDI
attribute.
Use the undo mdi command to restore the
default setting.
The MDI attribute that the port supported
is relevant to the port type. Please refer to Table
1-4 (Y for supported and N for not supported).
Table 1-4 Port
type and MDI attribute
|
Port type
|
MDI auto
|
MDI across
|
MDI normal
|
Default
|
|
100Mbps fixed electrical port
|
Y
|
Y
|
Y
|
Normal
Currently,
the mdi auto command is not supported. However, an port operates in
MDI auto-sensing mode automatically when the duplex setting or speed setting
is set to auto.
|
|
1000Mbps fixed electrical port
|
Y
|
N
|
N
|
auto
|
|
1000Mbps electrical port of expansion
interface card
|
N
|
Y
|
Y
|
normal
|
|
All optical ports
|
N
|
N
|
N
|
—
|
|
POE interface card
|
N
|
N
|
Y
|
normal
|
|
Stack card
|
N
|
N
|
N
|
—
|
Example
# Set the Ethernet1/0/1 (100Mbps fixed
electrical port) to support MDIX.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] mdi across
Syntax
port access vlan vlan-id
undo port
access vlan
View
Ethernet port view
Parameter
vlan-id:
VLAN ID, in the range of 1 to 4094.
Description
Use the port access vlan command to
add the access port into the specified VLAN.
Use the undo port access vlan
command to remove the access port from the specified VLAN.
You must specify the ID of an existing VLAN
in the command.
Example
# Add the Ethernet1/0/1 port into VLAN 3.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] vlan 3
[H3C-vlan3] quit
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] port access vlan 3
Syntax
port hybrid pvid
vlan vlan-id
undo port hybrid pvid
View
Ethernet port view
Parameter
vlan-id:
VLAN ID, in the range of 1 to 4094. It defaults to 1.
Description
Use the port hybrid pvid vlan command
to set the default VLAN ID for the hybrid port.
Use the undo port hybrid pvid
command to restore the default setting.
To guarantee the proper packet
transmission, the default VLAN ID of the local hybrid port should be identical
with that of the hybrid port on the peer switch.
Related command: port link-type.
Example
# Set the default VLAN ID for the Ethernet1/0/1
hybrid port as 100.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] port hybrid pvid
vlan 100
Syntax
port hybrid vlan
vlan-id-list { tagged | untagged }
undo port hybrid vlan vlan-id-list
View
Ethernet port view
Parameter
vlan-id-list:
vlan-id-list = [ vlan-id1 [ to vlan-id2 ]
]&<1-10>, VLAN range to which the hybrid ports are added. vlan-id
is in the range of 1 to 4094 and can be discrete. &<1-10> means you
can enter the parameter for ten times at most.
tagged: The
packets of the specified VLAN will be assigned with tags.
untagged:
The packets of the specified VLAN will not be assigned with tags.
Description
Use the port hybrid vlan command to
add the hybrid port into the specified VLAN.
Use the undo port hybrid vlan
command to remove the hybrid port from the specified VLAN.
A hybrid port can belong to multiple VLANs.
When you use the command several times, all VLAN specified in the commands will
be allowed to pass the port.
Related command: port link-type.
Example
# Add the Ethernet1/0/1 hybrid port to VLAN
2, VLAN 5 and VLAN 50 through VLAN 100, with tags assigned to their packets.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] port hybrid vlan
2 4 50 to 100 tagged
Syntax
port link-type { access | hybrid | trunk }
undo port link-type
View
Ethernet port view
Parameter
access:
Specifies the link type as access.
hybrid:
Specifies the link type as hybrid.
trunk:
Specifies the link type as trunk.
Description
Use the port link-type command to
set link type for the Ethernet port.
Use the undo port link-type command
to restore the default link type, that is, access.
You can configure all the three types of
ports on the same device. However, note that you cannot directly switch a port between
trunk and hybrid and you must set the port as access before the switching. For
example, to change a trunk port to hybrid, you must first set it as access and
then hybrid.
By default, the link type for all ports is
access.
Example
# Set the link type of the Ethernet1/0/1
port as trunk.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] port link-type
trunk
Syntax
port trunk permit vlan { vlan-id-list | all }
undo port trunk permit vlan { vlan-id-list | all }
View
Ethernet port view
Parameter
vlan-id-list:
vlan-id-list = [ vlan-id1 [ to vlan-id2 ]
]&<1-10>, VLAN range to which the trunk ports are added. vlan-id
is in the range of 1 to 4094 and can be discrete. &<1-10> means you
can enter the parameter for ten times at most.
all: Adds
the trunk port into all VLANs.
Description
Use the port trunk permit vlan
command to add the trunk port into the specified VLAN.
Use the undo port trunk permit vlan
command to remove the hybrid port from the specified VLAN.
A trunk port can belong to multiple VLANs. When
you use the command several times, all VLAN specified in the commands will be
allowed to pass the port.
Related command: port link-type.
Example
# Add the Ethernet1/0/1 trunk port to VLAN
2, VLAN 5 and VLAN 50 through VLAN 100.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] port trunk permit
vlan 2 4 50 to 100
Please wait...
Done.
Syntax
port trunk pvid vlan vlan-id
undo port
trunk pvid
View
Ethernet port view
Parameter
vlan-id:
VLAN ID, in the range of 1 to 4094. It defaults to 1.
Description
Use the port
trunk pvid vlan command to set the default VLAN ID
for the trunk port.
Use the undo port trunk pvid command to restore the default
setting.
To guarantee the proper packet
transmission, the default VLAN ID of the local trunk port should be identical
with that of the trunk port on the peer switch.
Related command: port link-type.
Example
# Set the default VLAN ID for the Ethernet1/0/1
trunk port as 100.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] port trunk pvid vlan 100
Syntax
reset counters interface [ interface-type | interface-type
interface-number ]
View
User view
Parameter
interface-type:
Port type.
interface-number: Port number.
For details about the parameters, see the description
part of the interface command.
Description
Use the reset counters interface
command to clear the statistics of the port, preparing for a new statistics
collection.
l
If you specify neither port type nor port
number, the command clears statistics of all ports.
l
If specify only port type, the command clears
statistics of all ports of this type.
l
If specify both port type and port number, the command
clears statistics of the specified port.
Example
# Clear the statistics of the Ethernet1/0/1
port.
<H3C> reset counters interface
ethernet1/0/1
Syntax
shutdown
undo shutdown
View
Ethernet port view
Parameter
None
Description
Use the shutdown command to disable
an Ethernet port.
Use the undo shutdown command
to enable an Ethernet port.
By default, an Ethernet port is enabled.
Example
# Enable the Ethernet1/0/1 port.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] undo shutdown
Syntax
speed {
10 | 100 | 1000 | auto }
undo speed
View
Ethernet port view
Parameter
10: 10 Mbps
port rate.
100: 100
Mbps port rate.
1000: 1000
Mbps port rate.
auto:
Auto-negotiation rate mode.
Description
Use the speed command to set port
rate.
Use the undo speed command to
restore default setting.
By default, the port is in auto-negotiation
rate mode.
Related command: duplex.
Example
# Set the rate of the Ethernet1/0/1 port to
10 Mbps.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet1/0/1] speed 10
Syntax
virtual-cable-test
View
Ethernet port view
Parameter
None
Description
Use the virtual-cable-test command
to enable the system to test the cable connected to a specific port and to
display the results. The system can test these attributes of the cable:
l
Cable status, including normal, abnormal,
abnormal-open, abnormal-short and failure
l
Cable length
l
If the cable is in normal state, the displayed
length value is the total length of the cable.
l
If the cable is in any other state, the
displayed length value is the length from the port to the faulty point.
l
Currently, the following testing functions are
available on an S3100-SI series switch: cable status testing and Cable length
testing.
l
Pair impedance mismatch
l
Pair skew
l
Pair swap
l
Pair polarity
l
Insertion loss
l
Return loss
l
Near-end crosstalk
By default, the system does not test the
cable connected to the Ethernet port.
Example
# Enable the system to test the cable
connected.
<H3C> system-view
System View: return to User View with
Ctrl+Z.
[H3C] interface ethernet1/0/1
[H3C-Ethernet0/1] virtual-cable-test
Cable status: abnormal(open), 7 metres
Pair Impedance mismatch: yes
Pair skew: 4294967294 ns
Pair swap: swap
Pair polarity: normal
Insertion loss: 7 db
Return loss: 7 db
Near-end crosstalk: 7 db
