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S2700 Series Switches Hardware Description

This document provides an overall description of the S2700 hardware, helping you obtain detailed information about each chassis, cable, and optical module.
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Version Mapping

Table 4-40 lists the mapping between the S2700-26TP-PWR-EI and software versions.

Table 4-40 Version mapping



Software Version
S2700-EI S2700-26TP-PWR-EI

V100R005C01 to V100R006C05

Appearance and Structure

Figure 4-21 S2700-26TP-PWR-EI appearance
1 Twenty-four PoE+ 10/100BASE-TX ports 2 Two combo ports (10/100/1000BASE-T + 100/1000BASE-X)
Modules applicable to combo optical ports:
3 One console port 4 Ground screw
It is used with Ground cable.
5 ESD jack 6 Fan slot

Applicable fan module:

CX7E1FANA fan module

7 Power module slot 2
8 Power module slot 1

Port Description

10/100BASE-TX port
A 10/100BASE-TX Ethernet electrical port sends and receives service data at 10/100 Mbit/s, and must use an Ethernet cable. Table 4-41 lists the attributes of a 10/100BASE-TX Ethernet electrical port.
Table 4-41 Attributes of a 10/100BASE-TX Ethernet electrical port



Connector type


Standards compliance

IEEE802.3, IEEE802.3u, IEEE802.3ab

Electrical port attributes


  • A medium dependent interface (MDI) provides the physical and electrical connection to the cabling medium. Ethernet ports of most NICs are MDIs.
  • A medium dependent interface crossover (MDIX) enables connection between like devices. MDIX ports are usually used on hubs or LAN switches.

Working mode

10/100 Mbit/s auto-sensing

Maximum transmission distance

100 m

Combo port
A combo port consists of an optical Ethernet port and an electrical Ethernet port on the panel. Each combo port matches only one internal forwarding port. The electrical and optical ports of a combo port are multiplexed, and only one of them can work at a time. When one of the Ethernet ports is working, the other port is shut down.

By default, a combo port works in auto mode, in which the port type is determined as follows:

  • If the optical port has no optical module installed and the electrical port has no Ethernet cable connected, the port type depends on which port is connected first. If the electrical port is connected by an Ethernet cable first, the electrical port is used for data switching. If the optical port has an optical module installed first, the optical port is used for data switching.
  • If the electrical port has an Ethernet cable connected and is in Up state, the electrical port is still used for data switching when the optical port has an optical module installed.
  • If the optical port, no matter in Up or Down state, has an optical module installed, the optical port is still used for data switching when the electrical port has an Ethernet cable connected.
  • If the optical port has an optical module installed and the electrical port has an Ethernet cable connected, the optical port is used for data switching after the switch restarts.
You can configure a combo port as an electrical or optical port using the combo-port command.
Console port
The console port of a switch can connect to an operation terminal for onsite configuration. The port must use Console Cable. To configure a switch after the first power-on, log in to the switch through the console port. Table 4-42 lists attributes of a console port.
Table 4-42 Attributes of a console port



Connector type


Standards compliance


Working mode

Full-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

Indicator Description

The S2700-26TP-PWR-EI has similar indicators to those of S2700-52P-PWR-EI, except that the S2700-26TP-PWR-EI does not have a stack mode indicator. For details, see Indicator Description.

Power Supply Configuration

The S2700-26TP-PWR-EI has two power module slots, each of which can have a 500 W or 250 W power module installed. A power module can provide 369.6 W or 123.2 W of PoE power for powered devices (PDs). Table 4-43 lists its power supply configurations.
Table 4-43 Power supply configurations
Power Module 1 Power Module 2 Available PoE Power Maximum Number of Ports (Fully Loaded)
250 W 123.2 W
  • 802.3af (15.4 W per port): 8
  • 802.3at (30 W per port): 4
500 W 369.6 W
  • 802.3af (15.4 W per port): 24
  • 802.3at (30 W per port): 12
250 W 250 W 246.4 W
  • 802.3af (15.4 W per port): 16
  • 802.3at (30 W per port): 8
500 W 500 W 739.2 W
  • 802.3af (15.4 W per port): 24
  • 802.3at (30 W per port): 24
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 4-22 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 4-22 Power supply by dual AC PoE power modules

L: live wire

N: neutral wire

PGND: protection ground

GND: 12 V reference ground

RTN: -53 V reference ground

Heat Dissipation

The S2700-26TP-PWR-EI uses pluggable fan modules for forced air cooling. Air flows in from the left and right sides, and exhausts from the rear panel.

The figure shows only the air flow direction.

Technical Specifications

Table 4-44 lists technical specifications of the S2700-26TP-PWR-EI.

Table 4-44 Technical specifications



Memory (RAM)

64 MB


16 MB

Mean time between failures (MTBF)

34.8 years

Mean time to repair (MTTR)

2 hours


> 0.99999

Service port surge protection

Common mode: ±1 kV

Power supply surge protection

±2 kV in differential mode, ±4 kV in common mode

Dimensions (H x W x D)

43.6 mm x 442.0 mm x 420.0 mm (1.72 in. x 17.4 in. x 16.5 in.)


≤ 8 kg (17.64 lb)

Stack ports

Not supported


Not supported



Rated voltage range

100 V AC to 240 V AC, 50/60 Hz

Maximum voltage range

90 V AC to 264 V AC, 47 Hz to 63 Hz

Maximum power consumption (100% throughput, 100% PoE loads, full speed of fans)

808 W (system power consumption: 68 W, PoE: 740 W)

Operating temperature

-5°C to +50°C (23°F to 122°F)

Storage temperature

-40°C to +70°C (-40°F to +158°F)

Noise under normal temperature (27°C, sound power)

< 51 dB(A)

Relative humidity

5% to 95%, noncondensing

Operating altitude

0-5000 m (0-16404 ft.)


  • EMC certification
  • Safety certification
  • Manufacturing certification

Part number

Updated: 2019-08-19

Document ID: EDOC1000027458

Views: 58830

Downloads: 1366

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