S6720-32C-PWH-SI-AC

Version Mapping

Table 1 lists the mapping between the S6720-32C-PWH-SI-AC chassis and software versions.

**Table 1** Version mapping
Series	Model	Software Version
S6720-SI	S6720-32C-PWH-SI-AC	V200R011C00 and later versions

Appearance and Structure

Figure 1 S6720-32C-PWH-SI-AC appearance

1	Twenty-four PoE++ 100M/1000M/2.5GE/5GE/10GE BASE-T ports (MultiGE port)	2	Four 10GE SFP+ ports Applicable modules and cables: GE optical module GE-CWDM optical module GE-DWDM optical module GE copper module (100M/1000M auto-sensing) 10GE SFP+ optical module (OSXD22N00 not supported) 10GE-CWDM optical module 10GE-DWDM optical module 1 m, 3 m, 5 m, and 10 m SFP+ high-speed copper cables 3 m and 10 m SFP+ AOC cables 0.5 m and 1.5 m SFP+ dedicated stack copper cables (used for zero-configuration stacking, supported in V200R011C10 and later versions) NOTE: The four 10GE SFP+ ports on the front panel cannot be used simultaneously with ports on the rear card (except the 4-port 10GE rear card). If a rear card other than a 4-port 10GE rear card is installed in the switch, only the ports on the front panel can be used by default. V200R011 version: To use the port on the rear card, run the set device port-on-card enable command. Then the four 10GE SFP+ ports on the front panel cannot be used. V200R012 and later versions: To use the port on the rear card, run the undo set device port-config-mode port-on-board enable command. Then the four 10GE SFP+ ports on the front panel cannot be used.
3	One PNP button NOTICE: Applicable in V200R012C00 and later versions: To restore the factory settings and reset the switch, hold down the button for at least 6 seconds. To reset the switch, press the button. Resetting the switch will cause service interruption. Exercise caution when you press the PNP button.	4	One console port
5	One ETH management port	6	One USB port
7	Ground screw NOTE: It is used with a ground cable.	8	ESN label NOTE: You can draw it out to view the ESN and MAC address of the switch.
9	Rear card slot NOTE: Cards supported: ES5D21Q02Q00 ES5D21X04S01	10	Fan slot NOTE: Applicable fan module: FAN-060B-B
11	Power module slot 2 NOTE: Applicable power modules: 580 W AC PoE power module 650 W DC PoE power module 1000 W AC PoE power module (applicable in V200R013C00 and later versions)	12	Power module slot 1 NOTE: Applicable power modules: 580 W AC PoE power module 650 W DC PoE power module 1000 W AC PoE power module (applicable in V200R013C00 and later versions)

Port Description

100M/1000M/2.5GE/5GE/10GE BASE-T port (MultiGE port)

A 100M/1000M/2.5GE/5GE/10GE BASE-T port (MultiGE port) sends and receives service data at 100 Mbit/s, 1 Gbit/s, 2.5 Gbit/s, 5 Gbit/s, or 10 Gbit/s, and must use an Ethernet cable. If the 2.5 Gbit/s, 5 Gbit/s, or 10 Gbit/s speed is required, the port must use an Ethernet cable of Cat5e or higher category. Table 2 describes the attributes of a 100M/1000M/2.5GE/5GE/10GE BASE-T port.

**Table 2** Attributes of a 100M/1000M/2.5GE/5GE/10GE BASE-T port
Attribute	Description
Connector type	RJ45
Standards compliance	IEEE802.3u, IEEE802.3ab, IEEE802.3bz, IEEE802.3an, mgbase-t
Working Mode	100/1000/2500/5000/10000 Mbit/s auto-sensing

Table 3 lists the maximum transmission distances of different cables on MultiGE ports.

**Table 3** Maximum transmission distances of different cables on MultiGE ports
Cable Type (6-a-1 Bundle)	MultiGE Port (Different Rates)
Cable Type (6-a-1 Bundle)	24*100M/1000M	Left 16x2.5GE	Right 8x2.5GE	24x5GE	24x10GE
Category 5e unshielded twisted pair (Cat5e UTP)	100 m	100 m	100 m	55 m 100 m (6-a-1 bundle only for the first 30 m) Not recommended due to high risk	Not supported
Category 5e shielded twisted pair (Cat5e STP)	100 m	100 m	200 m Only the APs listed below are supported if the transmission distance is longer than 100 m: AP7052DN/AP7152DN AP6052DN AP8082DN/AP8182DN AP7052DE AP7060DN	100 m	Not supported
Category 6 unshielded twisted pair (Cat6 UTP)	100 m	100 m	100 m	100 m Not recommended due to high risk	Not supported
Category 6 shielded twisted pair (Cat6 STP)	100 m	100 m	200 m Only the APs listed below are supported if the transmission distance is longer than 100 m: AP7052DN/AP7152DN AP6052DN AP8082DN/AP8182DN AP7052DE AP7060DN	100 m	Not supported
Category 6A unshielded twisted pair (Cat6A U/UTP)	100 m	100 m	100 m	100 m Not recommended due to high risk	Not supported
Category 6A foiled/unshielded twisted pair (Cat6A F/UTP)	100 m	100 m	200 m Only the APs listed below are supported if the transmission distance is longer than 100 m: AP7052DN/AP7152DN AP6052DN AP8082DN/AP8182DN AP7052DE AP7060DN	100 m	100 m
Category 6A shielded twisted pair (Cat6A STP)	100 m	100 m	200 m Only the APs listed below are supported if the transmission distance is longer than 100 m: AP7052DN/AP7152DN AP6052DN AP8082DN/AP8182DN AP7052DE AP7060DN	100 m	100 m
Category 7 twisted pair (Cat7)	100 m	100 m	200 m Only the APs listed below are supported if the transmission distance is longer than 100 m: AP7052DN/AP7152DN AP6052DN AP8082DN/AP8182DN AP7052DE AP7060DN	100 m	100 m

6-a-1 stands for the six-around-one cable bundle mode, with one cable in the center and six cables bundled evenly around it.

Some cables pose high risks and are not recommended for the following reasons:

802.3bz requires that the ALSNR value for alien crosstalk between Ethernet cables be greater than 0, but the standards for Cat5e and Cat6 unshielded twisted pairs do not specify the required ALSNR value. Therefore, such cables may not meet the crosstalk requirement in 802.3bz, causing severe problems such as continuous packet loss.
According the cabling specification TIA TSB-5021, using Cat5e and Cat6 cables for 5G poses high risks.
Currently, no clear onsite testing or evaluation method is available for checking whether ALSNR of cables conforms to 802.3bz.

If Cat5e and Cat6 unshielded twisted pairs do not meet the 5G requirement, you are advised to replace them with shielded twisted pairs or reduce the rate of interfaces to 2.5G.

10GE SFP+ port

A 10GE SFP+ Ethernet optical port supports auto-sensing to 1000 Mbit/s. It sends and receives service data at 1000 Mbit/s or 10 Gbit/s. Table 4 describes the attributes of a 10GE SFP+ Ethernet optical port.

**Table 4** Attributes of a 10GE SFP+ port
Attribute	Description
Connector type	LC/PC
Optical port attributes	Depend on the optical module used
Standards compliance	IEEE802.3ae
Working mode	GE/10GE auto-sensing

Console port

The console port is connected to a console for on-site configuration. The port must use a console cable. The console port is used when a switch is powered on for the first time. For details about the attributes of a console port, see Table 5.

**Table 5** Attributes of a console port
Attribute	Description
Connector type	RJ45
Standards compliance	RS-232
Working mode	Duplex Universal Asynchronous Receiver/Transmitter (UART)
Baud rate	9600 bit/s, 19200 bit/s, 38400 bit/s, 57600 bit/s, or 115200 bit/s Default value: 9600 bit/s

ETH management port

You can connect a switch to a configuration terminal or network management workstation through the ETH management port to configure the switch locally or remotely. The port must use an Ethernet cable. You can choose to download the software package through the ETH management port in the BootLoad menu. File transfer through the ETH management port is faster than transfer through the console port. Table 6 describes the attributes of an ETH management port.

**Table 6** Attributes of an ETH management port
Attribute	Description
Connector type	RJ45
Standards compliance	IEEE802.3
Working mode	10/100 Mbit/s auto-sensing
Maximum transmission distance	100 m

In V200R012C00 and later versions, you can log in to the switch that contains the ETH management port for the first time through the ETH port. For details, see "First Login to a Switch" in the Configuration Guide - Basic Configuration. If you have logged in to the device for the first time by pressing and holding the MODE button for 6 seconds or longer and saved the configuration, the default configuration on the ETH port will be cleared. In this case, you cannot log in to the switch for the first time through the ETH port. You are advised to log in to the switch for the first time through the ETH port.

USB port

The USB port can have a USB flash drive connected to upgrade the switch, or transfer configuration files or other files. The USB port can only connect to a USB flash drive that complies with USB 2.0.

USB flash drives from different vendors differ in model compatibility and drivers. If a USB flash drive cannot be used, try to replace it with another one from a mainstream vendor. Switches support a maximum of 128 GB USB flash drives.

Indicator Description

Hold down the mode switch button for 6s and release it to start the web initial login mode. Either of the following situations will occur:

If the switch has no configuration file, the system attempts to enter the web initial login mode. In this mode, the status of mode indicators is as follows:
- If the system enters the web initial login mode successfully, all mode indicators turn green and stay on for a maximum of 10 minutes.
- If the system fails to enter the initial login mode, all mode indicators fast blink for 10 seconds and then restore the default status.
If the switch has a configuration file, the system cannot enter the web initial login mode. In this case, all mode indicators fast blink for 10s, and then return to the default states.

Figure 2 Indicators on the S6720-32C-PWH-SI-AC

The S6720-SI series switches provide a command for setting fault indicators, which help field maintenance personnel find a faulty switch quickly.

The SYS indicator and mode indicators (STAT, SPED, and STCK) are used as fault indicators of a switch. If the switch fails, its SYS indicator and mode indicators can be configured to blink red fast so that field maintenance personnel can find this faulty switch.

**Table 7** Description of indicators on the switch
No.	Indicator	Name	Color	Status	Description
1	PWR1	Power module indicator	-	Off	No power module is available in power module slot 1, or the switch has only one power module but the power module does not work normally.
			Green	Steady on	A power module is installed in power module slot 1 and is working normally.
			Yellow	Steady on	The switch has two power modules installed. Any of the following situations occurs in power module slot 1: A power module is available in this slot but its power switch is in the OFF position. A power module is available in this slot but it is not connected to a power source. The power module in this slot has failed.
2	PWR2	Power module indicator	-	Off	No power module is available in power module slot 2, or the switch has only one power module but the power module does not work normally.
			Green	Steady on	A power module is installed in power module slot 2 and is working normally.
			Yellow	Steady on	The switch has two power modules installed. Any of the following situations occurs in power module slot 2: A power module is available in this slot but its power switch is in the OFF position. A power module is available in this slot but it is not connected to a power source. The power module in this slot has failed.
3	SYS	System status indicator	-	Off	The system is not running.
			Green	Fast blinking	The system is starting.
			Green	Slow blinking	The system is running normally.
			Red	Steady on	The system does not work normally after registration, or a fan alarm or temperature alarm has been generated.
4	STAT	Status indicator	-	Off	The status mode is not selected.
4	STAT	Status indicator	Green	Steady on	The status mode (default mode) is selected. If the status mode is selected, the service port indicator shows the port link or activity state.
5	SPED	Speed indicator	-	Off	The speed mode is not selected.
5	SPED	Speed indicator	Green	Steady on	The service port indicators show the port speeds. After 45 seconds, the service port indicators automatically restore to the status mode.
6	STCK	Stack indicator	-	Off	If you are not changing the indicator mode (default): The switch is in stack standby or slave state or the stacking function is not enabled on the switch. If you are changing the indicator mode: The stack mode is not selected.
			Green	Steady on	The switch is a standby or slave switch in a stack, and the service port indicators show the stack ID of the switch.
			Green	Blinking	If you are not changing the indicator mode (default): The switch is a stack master switch or a standalone switch with the stacking function enabled. If you are changing the indicator mode: The switch is the master switch in a stack or a standalone switch, and the service port indicators show the stack ID of the master switch. After 45 seconds, the service port indicators automatically restore to the status mode.
7	PoE	PoE indicator	-	Off	The PoE mode is not selected.
7	PoE	PoE indicator	Green	Steady on	The service port indicators show the PoE status. After 45 seconds, the service port indicators automatically restore to the status mode.
8	MODE	Mode switch button	-	-	When you press this button once, the service port indicators change to the speed mode and show the speed of each service port When you press this button a second time, the service port indicators change to the stack mode and show the stack ID of the local switch. When you press this button a third time, the service port indicators change to the PoE mode and show the PoE status of each service port. When you press this button a fourth time, the service port indicators restore to the default mode, and the STAT indicator turns green. If you do not press the MODE button within 45 seconds, the service port indicators restore to the default mode. In this case, the STAT indicator is steady green, the SPED and PoE indicators are off, and the STCK indicator is off or blinking green.
9	-	Service port indicator	Meanings of service port indicators vary in different modes. For details, see Table 8 and Table 9.
10	-	ETH port indicator	-	Off	The ETH port is not connected.
			Green	Steady on	The ETH port is connected.
			Green	Blinking	The ETH port is sending or receiving data.
11	-	USB-based deployment indicator	-	Off	No USB flash drive is connected to the switch. The USB port is damaged. The indicator is damaged. The USB flash drive does not have any configuration file and cannot be used for deployment. The switch has been upgraded using the USB flash drive and is restarting.
			Green	Steady on	A USB-based deployment has been completed.
			Green	Blinking	The system is reading data from the USB flash drive.
			Yellow	Steady on	The switch has copied all the required files and completed the file check. The USB flash drive can be removed from the switch.
			Red	Blinking	An error has occurred when the system is executing the configuration file or reading data from the USB flash drive.

**Table 8** Description of service port indicators in different modes (one indicator for each port)
Display Mode	Color	Status	Description
Status	-	Off	The port is not connected or has been shut down.
	Green	Steady on	A link has been established on the port.
	Green	Blinking	The port is sending or receiving data.
Speed	-	Off	The port is not connected or has been shut down.
	Green	Steady on	The port is working at 100/1000 Mbit/s.
	Green	Blinking	The port is working at 2.5/5/10 Gbit/s.
PoE	-	Off	The port is not providing power to a powered device (PD).
	Green	Steady on	The port is providing power to a PD.
	Yellow	Steady on	The PoE function is disabled on the port.
	Yellow	Blinking	The port stops providing PoE power because of an exception (for example, an incompatible PD is connected to the port).
	Green and yellow	Blinking green and yellow alternately	The port fails to supply power to a PD due to one of the following reasons: The power required by the connected PD exceeds the maximum power or the configured power threshold of the port. The total power consumption of PDs has reached the maximum power of the switch. The manual power management mode is used and the port is not enabled to provide power to the PD.
Stack	-	Off	Port indicators do not show the stack ID of the switch.
	Green	Steady on	The switch is not the master switch in a stack. If the indicator of a port is steady on, the number of this port is the stack ID of the switch. If the indicators of ports 1 to 9 are steady on, the stack ID of the switch is 0.
	Green	Blinking	The switch is the master switch in a stack. If the indicator of a port is blinking, the number of this port is the stack ID of the switch. If the indicators of ports 1 to 9 are blinking, the stack ID of the switch is 0.

**Table 9** Description of service port indicators in different modes (two indicators for each port)
Display Mode	Color	Status	Description
Status	-	Off	The port is not connected or has been shut down.
	Green	Steady on	A link has been established on the port.
	Yellow	Blinking	The port is sending or receiving data.
Speed	-	Off	The port is not connected or has been shut down.
	Green and yellow	Steady on	The port is working at 100/1000 Mbit/s.
	Green and yellow	Blinking	The port is working at 2.5/5/10 Gbit/s.
PoE	-	Off	The port is not providing power to a powered device (PD).
	Green	Steady on	The port is providing power to a PD.
	Yellow	Steady on	The PoE function is disabled on the port.
	Yellow	Blinking	The port stops providing PoE power because of an exception (for example, an incompatible PD is connected to the port).
	Green and yellow	Blinking green and yellow alternately	The port fails to supply power to a PD due to one of the following reasons: The power required by the connected PD exceeds the maximum power or the configured power threshold of the port. The total power consumption of PDs has reached the maximum power of the switch. The manual power management mode is used and the port is not enabled to provide power to the PD.
Stack	-	Off	Port indicators do not show the stack ID of the switch.
	Green and yellow	Steady on	The switch is not the master switch in a stack. If the indicator of a port is steady on, the number of this port is the stack ID of the switch. If the indicators of ports 1 to 9 are steady on, the stack ID of the switch is 0.
	Green and yellow	Blinking	The switch is the master switch in a stack. If the indicator of a port is blinking, the number of this port is the stack ID of the switch. If the indicators of ports 1 to 9 are blinking, the stack ID of the switch is 0.

Power Supply Configuration

The S6720-32C-PWH-SI-AC is a PoE switch. It provides two power module slots, each supporting a 580 W, 650 W, or 1000 W (applicable in V200R013C00 and later versions) power module. A 580 W AC power module and a 650 W DC power module can be used together. A 580 W AC power module and a 1000 W AC power module can be used together. Table 10 lists its power supply configurations.

**Table 10** Power supply configurations
Power Module 1	Power Module 2	Available PoE Power	Maximum Number of Ports (Fully Loaded)
580 W or 650 W	–	369.6 W	802.3af (15.4 W per port): 24 802.3at (30 W per port): 12 802.3bt (60 W per port): 6
580 W or 650 W	580 W or 650 W	739.2 W	802.3af (15.4 W per port): 24 802.3at (30 W per port): 24 802.3bt (60 W per port): 12
1000 W (220 V)	-	754.6 W	802.3af (15.4 W per port): 24 802.3at (30 W per port): 24 802.3bt (60 W per port): 12
1000 W (220 V)	1000 W (220 V)	1440 W	802.3af (15.4 W per port): 24 802.3at (30 W per port): 24 802.3bt (60 W per port): 24
1000 W (110 V)	-	754.6 W	802.3af (15.4 W per port): 24 802.3at (30 W per port): 24 802.3bt (60 W per port): 12
1000 W (110 V)	1000 W (110 V)	1440 W	802.3af (15.4 W per port): 24 802.3at (30 W per port): 24 802.3bt (60 W per port): 24
1000 W	580 W	739.2 W	802.3af (15.4 W per port): 24 802.3at (30 W per port): 24 802.3bt (60 W per port): 12
580 W	1000 W	739.2 W	802.3af (15.4 W per port): 24 802.3at (30 W per port): 24 802.3bt (60 W per port): 12

When a switch has two power modules installed, the two power modules work in redundancy mode to provide power for the chassis and in load balancing mode to provide power for PDs.

Figure 3 shows the power supply mode of dual AC PoE power modules (PWR1 and PWR2). After AC power is transmitted to the PWR modules, the PWR modules provide 12 V and -53 V outputs. The outputs are combined on the motherboard, which then provides 12 V voltage for the switch and -53 V voltage for the PDs.

Figure 3 Power supply by dual AC PoE power modules

L: live wire

N: neutral wire

PGND: protection ground wire

GND: 12 V reference ground

RTN: -53 V reference ground

Figure 4 shows the power supply connections of dual DC PoE power modules. After DC power is transmitted to the PWR module, the PWR module provides 12 V and -53 V output voltages, and the motherboard provides 12 V voltage for the entire device and -53 V voltage for the PDs.

Figure 4 Power supply connections of dual DC PoE power modules

NEG: negative wire

RTN: positive wire

GND: 12 V reference ground

RTN: -53 V reference ground

Heat Dissipation

The S6720-32C-PWH-SI-AC uses a pluggable fan module for forced air cooling. Air flows in from the left, right, and front sides, and exhausts from the rear panel.

This figure only shows the airflow direction and does not depict the actual device.

Technical Specifications

Table 11 lists technical specifications of the S6720-32C-PWH-SI-AC.

**Table 11** Technical specifications
Item	Description
Memory (RAM)	1 GB
Flash	512 MB in total. To view the available flash memory size, run the display version command.
Mean time between failures (MTBF)	22.7 years
Mean time to repair (MTTR)	2 hours
Availability	> 0.99999
Service port surge protection	Common mode: ±7 kV
Power supply surge protection	Using 580 W AC or 1000 W AC power modules: ±6 kV in differential mode, ±6 kV in common mode Using 650 W DC power modules: ±2 kV in differential mode, ±4 kV in common mode
Dimensions (H x W x D)	44.4 mm x 442.0 mm x 420.0 mm (1.75 in. x 17.4 in. x 16.5 in.)
Weight (including package)	9.1 kg (20.06 lb)
Stack ports	Any MultiGE, 10GE SFP+, or 40GE QSFP+ ports (a maximum of 16 physical ports)
RTC	Supported
RPS	Not supported
PoE	Supported
Rated voltage range	100 V AC to 240 V AC, 50/60 Hz -48 V DC to -60 V DC
Maximum voltage range	90 V AC to 264 V AC, 47 Hz to 63 Hz -38.4 V DC to -72 V DC
Maximum power consumption (100% throughput, full speed of fans)	Using 650 W DC or 580 W AC power modules: Not providing the PoE function: 125.6 W (without card) 100% PoE loads: 1017.2 W (system power consumption: 278 W, PoE: 739.2 W, without card) Using 1000 W AC power modules: Not providing the PoE function: 125.6 W (without card) 100% PoE loads: 1735 W (system power consumption: 295 W, PoE: 1440 W)
Typical power consumption (30% of traffic load, tested according to ATIS standard)	Using 650 W DC or 580 W AC power modules: 106.9 W (without card and PoE) Using 1000 W AC power modules: 121.6 W (without card and PoE)
Operating temperature	0°C to 45°C (32°F to 113°F) at an altitude of 0-1800 m (0-5906 ft.) NOTE: When the altitude is 1800-5000 m (5906-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (722 ft.).
Short-term operating temperature	-5°C to +50°C (23°F to 122°F) at an altitude of 0-1800 m (0-5906 ft.) NOTE: When the altitude is 1800-5000 m (5906-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (722 ft.). The equipment can operate beyond the normal operating temperature range for a short-term period, but the following conditions must be met: The equipment operates at a temperature of over 45°C (113°F) consecutively for at most 96 hours in one year. The equipment operates at a temperature of over 45°C (113°F) for a total of no more than 360 hours in one year. The equipment operates at a temperature of over 45°C (113°F) for no more in 15 times in one year. The equipment may be damaged or experience unexpected exceptions if any of the preceding limits is exceeded. The equipment cannot start when the temperature is lower than 0°C (32°F). The maximum distance of optical modules used in these conditions cannot exceed 10 km.
Storage temperature	-40°C to +70°C (-40°F to +158°F)
Noise under normal temperature (27°C, sound power)	< 62.3 dB(A)
Relative humidity	5% to 95%, noncondensing
Operating altitude	0-5000 m (0-16404 ft.)
Certification	EMC certification Safety certification Manufacturing certification
Part number	98010719