Commands For Ethernet Port Configurations

2.1 Commands for Network Port Configuration

2.1.1 bandwidth

Command: bandwidth control <bandwidth> {transmit | receive | both}
???????????????????no bandwidth control
Function: Enable the bandwidth limit function on the port. The no command disables this function.
Parameters:

  • <bandwidth>: the bandwidth limit, which is shown in kbps ranging between 1-1000000K.
  • both: refers to the bandwidth limit when the port receives and sends data.
  • receive: refers to the bandwidth limit only being performed when the switch receives data from outside.
  • transmit: refers to the function being performed on sending only.

Command mode: Port Mode
Default: Bandwidth limit disabled.
Usage guide: When the bandwidth limit is enabled with a size set, the max bandwidth of the port is determined by this size other than by 10/100/1000M. If [both | receive | transmit] keyword is not specified, the default is both.
Note: The bandwidth limit cannot exceed the physical maximum speed on the port. For example, a 10/100M Ethernet port can not be set to a bandwidth limit at 101000K (or higher), but can be set on a 10/100/1000 port working at a speed of 100M. If the actual bandwidth is not an integral multiple of chip bandwidth granularity, it will be modified automatically. For example, a chip bandwidth granularity is 64K, but the input bandwidth is 50, the bandwidth will be modified to 64K.
Example: Set the bandwidth limit of 1/0/1-8 port to 40000K.

active500EM(config)#interface ethernet 1/0/1-8
active500EM(config-if-port-range)#bandwidth control 40000 both

2.1.2 combo-forced-mode

Command?combo-forced-mode {copper-forced | copper-preferred-auto | sfp-forced | sfp-preferred-auto }
Function? Sets to combo port mode (combo ports only).
Parameters?

  • copper-forced: forces use of copper cable port.
  • copper-preferred-auto: for copper cable port first.
  • sfp-forced: forces use of fiber cable port.
  • sfp-preferred-auto: for fiber cable port first.

Command mode: Port Mode.
Default: The default setting for combo mode of combo ports is sfp-preferred-auto.
Usage guide: The combo mode of combo ports and the port connection condition determines the active port of the combo ports. A combo port consists of one fiber port and a copper cable port. The speed-duplex command applies to the copper cable port while the negotiation command applies to the fiber cable port, they should not conflict. For combo ports, either the fiber cable port or copper cable port can be active at a time. Only this port can send and receive data normally. In the command output, the header row in the table indicates the combo mode of the combo port, while the first column indicates the connection conditions of the combo port.
Note:
1. Combo port involves the physical layer and the LLC sublayer of the datalink layer. The status of a combo port will not affect any operation in the MAC sublayer of the datalink layer and upper layers. If the bandwidth limit for a combo port is 1Mbps, then this 1Mbps applies to the active port of this combo port, regardless of the port type being copper or fiber.
2. If a combo port connects to another combo port, both parties should use the forced copper or the forced fiber mode.
3. Run show interface under Admin Mode to check for the active port of a combo port. The active port for a combo port is the fiber (or copper) cable port: Hardware is Gigabit-combo, active is fiber (or copper).
Example: Set ports 1/0/21-24 to the forced fiber mode.

active500EM(config)#interface ethernet 1/0/21-24
active500EM(config-if-port-range)#combo-forced-mode sfp-forced

2.1.3 clear counters interface

Command: clear counters [interface {ethernet <interface-list> | vlan <vlan-id> | port-channel <port-channel-number> | <interface-name>}] Function: Clears the statistics of the specified port.
Parameters:

  • <interface-list>: Ethernet port number.
  • <vlan-id>: VLAN interface number.
  • <port-channel-number>: trunk interface number.
  • <interface-name>: interface name, such as port-channel 1.

Command mode: Admin Mode.
Default: Port statistics are not cleared.
Usage guide: If no port is specified, then statistics of all ports will be cleared.
Example: Clearing the statistics for Ethernet port1/0/1.

active500EM#clear counters interface ethernet 1/0/1

2.1.4 flow control

Command: flow control
???????????????????no flow control
Function: Enables the flow control function for the port. The no command disables the flow control function for the port.
Parameters: None.
Command mode: Port Mode
Default: Port flow control is disabled.
Usage guide: After the flow control function is enabled, the port will notify the sending device to slow down the sending speed to prevent packet loss when traffic received exceeds the capacity of port cache. Ports support IEEE802.3X flow control. The ports work in half-duplex mode, supporting back-pressure flow control. If flow control results in serious HOL, the switch will automatically start HOL control (discarding some packets in the COS queue that may result in HOL) to prevent drastic degradation of network performance.
Note: Port flow control function is not recommended unless the users need a slow speed, low performance network with low packet loss. Flow control will not work between different cards in the switch. When enabling the port flow control function, speed and duplex mode of both ends should be the same.
Example: Enable the flow control function in ports 1/0/1-8.

active500EM(config)#interface ethernet 1/0/1-8
active500EM(config-if-port-range)#flow control

2.1.5 interface ethernet

Command: interface ethernet <interface-list>
Function: Enters Ethernet Port Mode from Global Mode.
Parameter:

  • <interface-list>: port number.

Command mode: Global Mode
Default: None.
Usage guide: Run the exit command to exit the Ethernet Port Mode and enter Global Mode.
Example: Enter the Ethernet Port Mode for ports1/0/1?1/0/4-5?and 1/0/8.

active500EM(config)#interface ethernet 1/0/1;1/0/4-5;1/0/8
active500EM(config-if-port-range)#

2.1.6 loopback

Command: loopback
???????????????????no loopback
Function: Enables the loopback test function in an Ethernet port. The no command disables the loopback test on an Ethernet port.
Parameters: None.
Command mode: Port Mode
Default: Loopback test is disabled in the Ethernet port.
Usage guide: The loopback test can be used to verify that the Ethernet ports are working normally. After loopback has been enabled, the port will assume a connection established to itself. All traffic sent from the port will be received at the same port.
Example: Enable the loopback test function in Ethernet ports 1/0/1-8.

active500EM(config)#interface ethernet 1/0/1-8
active500EM(config-if-port-range)#loopback

2.1.7 name

Command: name <string>
???????????????????no name
Function: Configure the name for the appointed port. The no command cancels this configuration.
Parameter:

  • <string>: string. A maximum of 200 characters can be entered.

Command mode: Port Mode.
Default: No name.
Usage guide: Users can configure the name according to how the port is used. For example, if port 1/0/1-2 is used by the finance department, the port can be defined with a name of ?finance?.
Example: Assign the name of the port of 1/0/1-2 as finance.

active500EM(config)#interface ethernet 1/0/1-2
active500EM(config-if-port-range)#name finance

2.1.8 negotiation

Command: negotiation {on | off}
Function: Enables/Disables the auto-negotiation function of a 1000Base-FX port.
Parameters:

  • on: enables the auto-negotiation.
  • off: disables the auto-negotiation.

Command mode: Port configuration Mode
Default: Auto-negotiation is enabled.
Usage guide: This command applies to the 1000Base-FX interface only. The negotiation command is not available for the 1000Base-TX or 100Base-TX interface. For combo ports, this command applies to the 1000Base-FX port only and has no effect on the 1000Base-TX port. To change the negotiation mode, speed, and duplex mode of the 1000Base-TX port, use the speed-duplex command instead.
Example: Port 1 of Switch1 is connected to port 1 of Switch2. The following will disable the negotiation for both ports.

active500EM1(config)#interface ethernet1/0/1
active500EM1(config-if-ethernet1/0/1)#negotiation off
active500EM2(config)#interface ethernet1/0/1
active500EM2(config-if-ethernet1/0/1)#negotiation off

2.1.9 port-rate-statistics interval

Command: port-rate-statistics interval <interval-value>
Function: Set the interval of port-rate-statistics. The valid values are from 5 to 600.
Parameter:

  • <interval-value>: The interval of port-rate-statistics. The unit is seconds with a valid range from 5 to 600 with the configuration step of 5.

Command mode: Global Mode
Default: Only port-rate-statistics of 5 seconds and 5 minutes are displayed.
Usage guide: Sets the interval of port-rate-statistics.
Example: Set the interval of port-rate-statistics to 20 seconds.

active500EM(config)#port-rate-statistics interval 20

2.1.10 port-scan-mode

Command: port-scan-mode {interrupt | poll}
???????????????????no port-scan-mode
Function: Configure the scan mode of the port to ?interrupt? or ?poll?. The no command restores the default to scan mode.
Parameters:

  • interrupt: interrupt mode.
  • poll: poll mode.

Command mode: Global Mode
Default: Poll mode.
Usage guide: There are two modes that can respond to an up/down port event. In interrupt mode, the hardware is interrupted to announce an up/down change. The MRPP convergence time is less than 50 milliseconds. In poll mode, the software poll can obtain the port event. The MRPP convergence time is several hundred milliseconds.
Notice: The scan mode of the port is usually configured as poll mode as it features better security.
Example: Configure the scan mode of the port as interrupt mode.

active500EM(config)#port-scan-mode interrupt

2.1.11 port-status query interval

Command: port-status query interval <2-10>
Function: Configure the query time to determine the port status at a certain time interval
Parameter:

  • <2-10>: Query Interval time in seconds. Value is accepted from range 2-10

Command mode: Global mode
Usage Guide: Checks the port status.
Example: Configure the port status query interval.

active500EM(config)#port-status query interval 2

2.1.12 storm-control

Command?storm-control {unicast | broadcast | multicast} <packets>
???????????????????no storm-control {unicast | broadcast | multicast}
Function? Configure the broadcast, multicast, or unicast flows which are allowed for all the ports. The no command disables this suppression function. The no command allows wire-speed broadcast, multicast, and unicast flow.
Parameters?

  • unicast: suppression of unicast flow.
  • multicast: suppression of multicast flow.
  • broadcast: suppression broadcast flow.
  • <packets>: packet number limit. The valid value is from 1 to 1488905. For non-10GB ports, the unit of <packets> is PPS (the number of packets allowed to pass per second). For 10GB ports, the unit is KPPS (the value of <packets> multiplied by 1000 equals the number of packets allowed. The value will be less than 14880.)

Command mode: Port Mode
Default: No suppression.
Usage Guide?If no VLAN is configured, all switch ports are in the same broadcast domain. In unicast, multicast, and broadcast flow, the switch will send to all ports in the broadcast domain which may form a broadcast storm. A broadcast storm adversely affects switch performance. Enabling the storm-control function of the switch can protect the switch from a broadcast storm. Note: This command affects the 10G ports differently. When configuring the broadcast flow for the 10G port to 3, extra packets will be dropped if there are more than 3 broadcast packets received per second.
Example?Configure 3 broadcast packets to pass the port (1000M) of 1/0/8-10 per second.

active500EM(config)#interface ethernet 1/0/8-10
active500EM(config-if-port-range)#storm-control broadcast 3

2.1.13 rate-violation

Command: rate-violation <200-2000000> [recovery <0-86400>] ???????????????????no rate-violation
Function: Set the max packet reception rate of a port. If the rate of the received packet violates the packet reception rate, shut down this port and configure the recovery time. The default is 300s. The no command will disable the rate-violation function of the port.
The rate-violation means that the port received all packet rates (the number of the received packets per second), without distinguishing the packet type.

Parameters:

  • <200-2000000>: max packet reception rate of the port. The unit is packets/second.
  • <0-86400>: interval of recovery after shutdown. The unit is seconds.
  • recovery: recovery time of the port after shutdown.
  • <0-86400>: timeout of recovery. For example, if the shutdown of a port happens after the packet reception rate exceeds the limit, the port will be up again when the user-defined timeout expires. The default timeout is 300s. 0 means the recovery will never happen.

Command mode: Interface Mode
Default: There is no control operation for rate-violation.
Usage guide: This command is mainly used to detect abnormal port flow. For example, when there are a large number of broadcast messages caused by a loopback, which affects the processing of other tasks, the port will shut down to ensure normal processing of the switch.
Example: Set the rate-violation of port 1/0/8-10 (GB ports) of the switch to 10000pps and the port recovery time to 1200 seconds.

active500EM(config)#interface ethernet 1/0/8-10
active500EM(config-if-port-range)#rate-violation 10000 recovery 1200

2.1.14 show interface

Command: show interface [ethernet <interface-number> | port-channel <port-channel-number> | loopback <loopback-id> | vlan <vlan-id> | tunnel <tunnel-id> | <interface-name>] [detail]
???????????????????show interface ethernet status
???????????????????show interface ethernet counter {packet | rate}
Function: Show the layer 3 or layer 2 port information for the switch.
Parameters:

  • <interface-number>: port number of the Ethernet. The status shows information for all the layer 2 ports.
  • <port-channel-number>: number of the aggregation interface.
  • <loopback-id>: loop back number. The valid range is from 1 to 1024.
  • <vlan-id>: VLAN interface number. The valid range is from 1 to 4094.
  • <tunnel-id>: the tunnel number. The valid range is from 1 to 50.
  • <interface-name>: the name of the interface such as port-channel1.
  • [detail]: detail of the port.
  • counter {packet | rate}: package number or rate statistics of all layer 2 ports.

Command mode: Admin and Configuration Mode
Default: Information not displayed.
Usage guide: For vlan interfaces, the port MAC address, IP address and the statistic state of the data packet will be shown. For tunnel ports, this command will show the tunnel interface state and the statistic state of the control layer receives/sends tunnel data packet. Refer to the show interface ethernet command for data for the physical interface receiving/sending data packe. For the loopback port, this command will show the interface statistic state of the IP address and receiving/sending data packet. Much like the Ethernet port, this command will show port speed rate, duplex mode, flow control switch state, broadcast storm suppression of the port and the statistic state of the data packets. For the aggregated port, port speed rate, duplex mode, flow control switch state, broadcast storm suppression of the port and the statistic state of the data packets will be displayed. The information of all ports on the switch will be shown if no port is specified.
Using [detail] to show the detailed information for ethernet port and port-channel port, the information is related to the type of switch and board card.
For ethernet port, use status to show information of all the layer 2 ports by list format. Each port is a row, and the information includes port number, Link, Protocol status, Speed, Duplex, Vlan, port type and port name. Counter packets show package number statistics of all ethernet ports, including layer 2 unicast, broadcast, multicast, error of input and output redirection package number. Counter rate shows the rate statistics of all ethernet ports, input and output package number, byte number in 5 minutes and 5 seconds.
Examples:
Show the information of VLAN 1.

active500EM#show interface vlan 1
Vlan1 is up, line protocol is up, dev index is 2005
  Device flag 0x1003(UP BROADCAST MULTICAST)
  IPv4 address is:
    192.168.1.1      255.255.255.0     (Primary)
  Hardware is EtherSVI, address is 00-00-00-00-00-01
  MTU is 1500 bytes , BW is 0 Kbit
  Encapsulation ARPA, loopback not set
  5 minute input rate 0 bytes/sec, 0 packets/sec
  5 minute output rate 0 bytes/sec, 0 packets/sec
  The last 5 second input rate 0 bytes/sec, 0 packets/sec
  The last 5 second output rate 0 bytes/sec, 0 packets/sec
  Input packets statistics:
    Input queue 0/600, 0 drops
    0 packets input, 0 bytes, 0 no buffer
    0 input errors, 0 CRC, 0 frame alignment, 0 overrun
    0 ignored, 0 abort, 0 length error
  Output packets statistics:
    0 packets output, 0 bytes, 0 underruns
    0 output errors, 0 collisions, 0 late collisions

Show the information of loopback 1:

active500EM#show interface loopback 1
Loopback1 is up, line protocol is up, dev index is 2006
  Device flag 0x100b(UP BROADCAST LOOP MULTICAST)
  IPv4 address is:
    1.1.1.1          255.255.255.255   (Primary)
  MTU is 1500 bytes , BW is 0 Kbit
  5 minute input rate 0 bytes/sec, 0 packets/sec
  5 minute output rate 0 bytes/sec, 0 packets/sec
  The last 5 second input rate 0 bytes/sec, 0 packets/sec
  The last 5 second output rate 0 bytes/sec, 0 packets/sec
  Input packets statistics:
    Input queue 0/600, 0 drops
    0 packets input, 0 bytes, 0 no buffer
    0 input errors, 0 CRC, 0 frame alignment, 0 overrun
    0 ignored, 0 abort, 0 length error
  Output packets statistics:
    0 packets output, 0 bytes, 0 underruns
    0 output errors, 0 collisions, 0 late collisions

Show the information of tunnel 1

active500EM#show interface tunnel 1
Tunnel1 is up, line protocol is up, dev index is 2007
  Device flag 0x91(UP P2P NOARP)
  IPv4 address is:
    (NULL)
  5 minute input rate 0 bytes/sec, 0 packets/sec
  5 minute output rate 0 bytes/sec, 0 packets/sec
  The last 5 second input rate 0 bytes/sec, 0 packets/sec
  The last 5 second output rate 0 bytes/sec, 0 packets/sec
  Input packets statistics
    Input queue 0/600, 0 drops
    0 packets input, 0 bytes, 0 no buffer
    0 input errors, 0 CRC, 0 frame alignment, 0 overrun
    0 ignored, 0 abort, 0 length error
  Output packets statistics:
    0 packets output, 0 bytes, 0 underruns
    0 output errors, 0 collisions, 0 late collisions

Show the information of port 1/0/1.

active500EM#show interface Ethernet 1/0/1
Ethernet1/0/1 is up, line protocol is down
  Ethernet1/0/1 is layer 2 port, alias name is (null), index is 1
  Hardware is Gigabit-TX, address is 00-03-0f-02-fc-01
  PVID is 1
  MTU 1500 bytes, BW 10000 Kbit
  Encapsulation ARPA, Loopback not set
  Auto-duplex: Negotiation half-duplex,  Auto-speed: Negotiation 10M bits
  FlowControl is off, MDI type is auto
  5 minute input rate 0 bytes/sec, 0 packets/sec
  5 minute output rate 0 bytes/sec, 0 packets/sec
  The last 5 second input rate 0 bytes/sec, 0 packets/sec
  The last 5 second output rate 0 bytes/sec, 0 packets/sec
  Input packets statistics:
    0 input packets, 0 bytes, 0 no buffer
    0 unicast packets, 0 multicast packets, 0 broadcast packets
    0 input errors, 0 CRC, 0 frame alignment, 0 overrun, 0 ignored
    0 abort, 0 length error, 0 pause frame
  Output packets statistics:
    0 output packets, 0 bytes, 0 underruns
    0 unicast packets, 0 multicast packets, 0 broadcast packets
    0 output errors, 0 collisions, 0 late collisions, 0 pause frame

Show information for all layer 2 ports:

active500EM#show interface ethernet status
Codes: A-Down - administratively down, a - auto, f - force, G - Gigabit
Interface  Link/Protocol  Speed   Duplex  Vlan   Type            Alias Name
1/0/1      UP/UP	  f-100M  f-full  1	 G-TX
1/0/2 	   UP/UP	  a-100M  a-full  trunk	 G-TX
1/0/3 	   UP/DOWN	  auto 	  auto	  1	 G-TX
1/0/4 	   A-Down/DOWN    auto	  auto	  1	 G-TX
 --More--

Show the package number statistics information for all layer 2 ports:

active500EM#show interface ethernet counter packet
Interface      Unicast(pkts)       BroadCast(pkts)     MultiCast(pkts)     Err(pkts)
1/0/1	  IN   12,345,678 	   12,345,678,9	       12,345,678,9 	   4,567
	  OUT  23,456,789 	   34,567,890	       5,678 		   0
1/0/2 	  IN   0 		   0 		       0 		   0
 	  OUT  0 		   0 		       0 		   0
1/0/3 	  IN   0 		   0 		       0 		   0
	  OUT  0 		   0 		       0 		   0
1/0/4 	  IN   0 		   0 		       0 		   0
 	  OUT  0 		   0 		       0 		   0
 --More--

Show the rate statistics information of all layer 2 ports:

active500EM#show interface ethernet counter rate
Interface      IN(pkts/s)      IN(bytes/s)     OUT(pkts/s)     OUT(bytes/s)
1/0/1  	  5m   13,473          12,345,678      12,345          1,234,567
          5s   135             65,800          245             92,600
1/0/2 	  5m   0               0               0               0
          5s   0               0               0               0
1/0/3 	  5m   0               0               0               0
          5s   0               0               0               0
1/0/4 	  5m   0               0               0               0
          5s   0               0               0               0
 --More--

2.1.15 shutdown

Command: shutdown
???????????????????no shutdown
Function: Shuts down the specified Ethernet port. The no command opens the port.
Parameters: None.
Command mode: Port Mode
Default: Ethernet port is open.
Usage guide: When the Ethernet port is shut down, no data frames are sent in the port, and the port status displayed when the user types the ?show interface? command is ?down?.
Example: Opening ports 1/0/1-8.

active500EM(config)#interface Ethernet 1/0/1-8
active500EM(config-if-port-range)#no shutdown

2.1.16 speed-duplex

Command: speed-duplex {auto [10 [100 [1000]] [auto | full | half |]] | force10-half | force10-full | force100-half | force100-full | force100-fx [module-type {auto-detected | no-phy-integrated | phy-integrated}] | {{force1g-half | force1g-full} [nonegotiate [master | slave]]}| force10g-full}
???????????????????no speed-duplex
Function: Sets the speed and duplex mode for 1000Base-TX, 100Base-TX or 100Base-FX ports. The no command restores the default speed and duplex mode setting, i.e., auto speed negotiation and duplex.
Parameters:

  • auto is the auto speed and duplex negotiation, 10 is 10Mbps speed, 100 is 100Mbps speed, 1000 is 1000Mbps speed, auto is duplex negotiation, full is full-duplex, half is half-duplex.
  • force10-half: the forced 10Mbps at half-duplex mode.
  • force10-full: the forced 10Mbps at full-duplex mode.
  • force100-half: forced 100Mbps at half-duplex mode.
  • force100-full: forced 100Mbps at full-duplex mode.
  • force100-fx: forced 100Mbps at full-duplex mode.
  • module-type: type of 100Base-FX module.
  • auto-detected: automatic detection.
  • no-phy-integrated: there is no phy-integratd 100Base-FX module.
  • phy-integrated: phy-integratd 100Base-FX module.
  • force1g-half: forced 1000Mbps speed at half-duplex mode.
  • force1g-full: forced 1000Mbps speed at full-duplex mode.
  • nonegotiate: disables auto-negotiation forcibly for 1000Mb port.
  • master: forces the 1000Mb port to be master mode.
  • slave: forces the 1000Mb port to be slave mode.
  • force10g-full: forced 10000Mbps speed at full-duplex mode.

Command mode: Port Mode
Default: Auto-negotiation for speed and duplex mode is set.
Usage guide: This command configures the port speed and duplex mode. When configuring port speed and duplex mode, the speed and duplex mode must be the same as the setting of the remote end. For example, if the remote device is set to auto-negotiation, then auto-negotiation should be set at the local port. If the remote end is in forced mode, then forced mode should be set in the local end. 1000Gb ports are by default master when configuring non-negotiate mode. If one end is set to master mode, the other end must be set to slave mode.
Example: Port 1 of Switch1 is connected to port 1 of Switch2. The following will set both ports in forced 100Mbps at half-duplex mode.

active500EM1(config)#interface ethernet1/0/1
active500EM1(config-if-ethernet1/0/1)#speed-duplex force100-half
active500EM2(config)#interface ethernet1/0/1
active500EM2(config-if-ethernet1/0/1)#speed-duplex force100-half

2.1.17 virtual-cable-test

Command: virtual-cable-test interface (Ethernet <interface-list> |IFNAME)
Function: Test the link of the twisted pair cable connected to the Ethernet port. The response may include: well, short, open, or fail. If an error is found, the location of the error will be displayed (in meters it is away from the port).
Parameter:

  • <interface-list>: Port ID.

Command mode: Admin Mode
Default Settings: No link test.
Usage guide: A RJ-45 port connected with a twisted pair should be in accordance with the wiring sequence rules of IEEE802.3. Otherwise, the test results may display erroneous information. On a 100M port, only two pairs are used: (1, 2) and (3, 6). If a 1000M port is connected to a 100M port, the results of (4, 5) and (7, 8) will not show valid data. The results may show deviations according to the type of the twisted pair, the temperature, working voltage, and other conditions. When the temperature is 68 degree Fahrenheit (20 degrees Celsius), the voltage is stable without interference, and the length of the twisted pair is less than 100 meters, a deviation of +/-2 meters is allowed. When the port is at Link UP status, a deviation of +/-10 meters is allowed. Note: the test procedure will block all data flow on the line for 5-10 seconds before restoring to the original status. Note: Combo ports support VCT function detection only at copper cable port mode. 100M port does not diagnose the link length at Link UP status. 568A wiring sequence: (1 green white, 2 green), (3 orange white, 6 orange), (4 blue, 5 blue white), (7 brown white, 8 brown). 568B wiring sequence: (1 orange white, 2 orange), (3 green white, 6 green), (4 blue, 5 blue white), (7 brown white, 8 brown).
Example: Test the link status of the twisted pair connected to the 1000M port 1/0/25.

active500EM#virtual-cable-test interface ethernet 1/0/25
Interface Ethernet1/0/25:
---------------------------------------------------------------
Cable pairs        Cable status          Error length (meters)
---------------    -----------------     ----------------------
(1, 2)             open                  5
(3, 6)             open                  5
(4, 5)             open                  5
(7, 8)             short                 5


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