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Hardware Installation and Maintenance Guide

CloudEngine 8800, 7800, 6800, and 5800

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Hardware Installation and Use Precautions

Hardware Installation and Use Precautions

Chassis

  • 40GE ports of the CE5850-48T4S2Q-EI cannot be split into 10GE ports.
  • 10GE ports of the CE8850-32CQ-EI, CE6810EI, CE6810LI, CE6850HI, CE6851HI, CE6855HI, CE6856HI, CE6857EI, CE6860EI, CE6865EI, CE6870EI, CE6875EI, CE6880EI, and CE5855EI series switches do not support OSXD22N00 (LRM) or LE2MXSC80FF0 (linear) optical modules.
  • When a GE copper module is installed on a 10GE optical interface, in V100R001C00, the interface cannot connect to a 10M/100M interface. In V100R002C00 and later versions,
    • On the CE8860EI, CE8861EI, CE8868EI, and CE6860EI, such an interface cannot connect to a 10M/100M/1000M interface.
    • On the CE5810EI, CE6857EI, CE6875EI, and CE6865EI, such an interface can only connect to a 1000M interface.
    • On the CE6880-24S4Q2CQ-EI, such an interface can only connect to a 100M/1000M interface.
    • On the CE6880-48S4Q2CQ-EI, interfaces 1 to 12 can connect to 10M/100M/1000M interfaces, whereas interfaces 13 to 48 can only connect to 100M/1000M interfaces.
    • On other switch models, such an interface can only connect to a 10M/100M interface.
  • 10GE SFP+ Ethernet optical ports of the CE6850U-48S6Q-HI and CE6850U-24S2Q-HI can use 2GE/4GE/8GE FC optical modules.
  • When a CE6850-48T4Q-EI switch uses 350 W AC power modules and all its ports are in use, the length of each network cable used on the switch cannot exceed 30 m.
  • The two ETH management ports of the CE6855-48T6Q-HI, CE6856-48T6Q-HI, CE6850HI, and CE6850U-HI series switches cannot be used simultaneously. Choose one of them and use the other as a backup.
  • 600 W AC power modules are recommended for the CE6850-48T4Q-EI of V100R002C00 or a later version.
  • A 5 m SFP+ high-speed cable cannot be used to connect 10GE optical ports between the CE5850EI (running a version prior to V100R005C10) and CE5855EI switches. To connect the 10GE optical ports of the two switches, use any of the following methods:
    • Use a 1 m, 3 m, 7 m, or 10 m SFP+ high-speed cable.
    • Use an active optical cable (AOC) or optical modules and optical fibers.
    • Upgrade the system software of the CE5850EI switch to V100R005C10 or a later version.
  • A 5 m 1-to-4 QSFP+ high-speed cable cannot be used to connect a 40GE optical port (split into four 10GE ports) and 10GE optical ports between the CE5850EI (running a version prior to V100R005C10) and CE5855EI switches. To connect the 10GE and 40GE optical ports of the two switches, use any of the following methods:
    • Use a 1 m or 3 m 1-to-4 QSFP+ high-speed cable.
    • Use optical modules and optical fibers.
    • Upgrade the system software of the CE5850EI switch to V100R005C10 or a later version.
  • When the power module and fan module use forcible heat dissipation, they must use the same airflow method. For example, if the power module with back-to-front airflow is used, the fan module with back-to-front airflow must be used.
  • The console port and Mini USB port share one internal serial port. You can use the console port or Mini USB port as the serial port according to your needs. When the Mini USB is activated, the console port cannot be used. When both the console port and Mini USB port have a cable connected, the Mini USB port is used.
  • The combo port automatically selects the working mode as follows:
    • If the optical port has no optical module installed and the electrical port has no network cable connected, the port type depends on which port is connected first. If the electrical port is connected by a network 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 a network 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 has an optical module installed and is in Up state, the optical port is still used for data switching when the electrical port has a network cable connected.
    • If the optical port has an optical module and fiber installed and the electrical port has a network cable connected, the optical port is used for data switching after the switch restarts.

Card

  • Each 40GE QSFP+ optical port of the CE88-D16Q card can only be split into two 10GE ports. When the port works in 2*10GE mode, it can use:
    • QSFP+ optical module and MPO-4*DLC or MPO-8*FC optical fiber (Among the four pairs of DLC or FC fibers, only the two pairs marked 1 and 2 can be used to connect to remote interfaces.)
    • QSFP+ to 4*SFP+ high-speed cable (Among the four SFP+ wires, only the two marked A and B can be used to connect to remote interfaces.)
    • QSFP+ to 4*SFP+ AOC cable (Among the four SFP+ wires, only the two marked 1 and 2 can be used to connect to remote interfaces.)
  • The 24 10GE/25GE SFP28 optical ports on a CE88-D24S2CQ card are divided into 6 port groups, with four ports in each group (1-4, 5-8, 9-12...21-24).
    • If port mode 10g or undo port mode 10g is configured on any port in a port group, all the other ports in this group also work at 10 Gbit/s or 25 Gbit/s.

    • When the ports in a port group work at 25 Gbit/s, they support only 25GE modules or cables and will go Down if other types of modules or cables are used. When the ports in a port group work at 10 Gbit/s, they support only 10GE or 25GE variable-rate modules or cables and will go Down if other types of modules or cables are used.

    • If the switch is running a version earlier than V200R002C50, the ports in a port group must use the same type of transmission medium (copper or fiber). This constraint does not apply to V200R002C50 and later versions.

    • The 24 25GE/16G FC (SFP28) optical ports of the CE88-D24S2CQ-U card work at 25 Gbit/s by default and do not support GE/10GE auto-sensing. You can set the port rate to 10 Gbit/s using the port mode 10g command.

      The 24 25GE/16G FC (SFP28) optical ports are divided into six port groups, each of which contains four ports (1-4, 5-8, 9-12...21-24).
      • If port mode 10g or undo port mode 10g is configured on any port in a port group, all the other ports in this group also work at 10 Gbit/s or 25 Gbit/s.

      • When the ports in a port group work at 25 Gbit/s, they support only 25GE modules or cables and will go Down if other types of modules or cables are used. When the ports in a port group work at 10 Gbit/s, they support only 10GE or 25GE variable-rate modules or cables and will go Down if other types of modules or cables are used.

      • The maximum rate supported by a 16G FC optical port is 14 Gbit/s.

Power Module

  • All power modules are hot swappable. Before replacing a power module in a switch, make sure that the switch can be powered by the other power module after the power module is removed. Otherwise, services on the switches will be interrupted when the power module is removed.
  • A switch must use the power modules it supports.
  • Power modules in a chassis must have the same power and same heat dissipation method.
  • When only one power module is installed in a chassis, install a filler panel on the empty power supply slot.
  • Before powering off a switch, turn off all its power modules.
  • The ES0W2PSA0150 power module can only be used in the CE5855EI and cannot be used in any other models.

Fan Module

  • A chassis must use fan modules with the same airflow direction.
  • A chassis must use fan modules of the same series.
  • A chassis can work properly only when two fan modules are running. If one of fan modules is removed from the chassis, reinstall it into the chassis within 3 minutes.

Optical Module

  • Use optical modules certified for Huawei switches. Non-certified optical modules cannot ensure transmission reliability and may affect service stability on the switch. Huawei is not responsible for any problem caused by non-certified optical modules and will not fix such problems.
  • Single-fiber bidirectional (BIDI) optical modules must be used in pairs. For example, SFP-GE-LX-SM1310-BIDI must be used with SFP-GE-LX-SM1490-BIDI.

Cables

Table 2-1 describes the supported cabling types for a 10GBASE-T Ethernet electrical port.

Table 2-1 Supported cabling types for 10GBASE-T

Item

Category 7 STP Category 6A STP Category 6A UTP Category 6 STP Category 6 UTP
Cable description Category 7 shielded twisted pair (STP) Category 6A shielded twisted pair Category 6A unshielded twisted pair (UTP) Category 6 shielded twisted pair Category 6 unshielded twisted pair
Type Class F Class Ea Class Ea Class E Class E
Maximum transmission distance 100 m 100 m 100 m 100 m 37 m - 55 m
NOTE:
Category 6 unshielded cables may be limited by alien crosstalk beyond 37–meter channels.
Cabling system bandwidth 600 MHz
NOTE:

The cabling system exceeds the requirements for IEEE 10GBASE-T performance.

500 MHz
NOTE:

The cabling system exceeds the requirements for IEEE 10GBASE-T performance.

250 MHz
NOTE:

Category 6 is specified only to 250 MHz. The cabling system must be certified to 500 MHz according to TSB-155 to help ensure 10GBASE-T compliance.

NOTE:
  • In a newly built equipment room, Category 6A shielded twisted pairs or Category 7 twisted pairs are recommended. These cables can avoid alien crosstalk while having no special installation requirements. In addition, they can be used with other types of cables.
  • If Category 6 shielded or unshielded twisted pairs are used in an equipment room and the cabling systems can meet requirements of TSB-155, follow these rules to route these cables:
    • Separate these cables with other types of cables. If they must be routed in the same cable trough with other types of cables, separated them from other cables using a metal plate.
    • Separate cables as much as possible at the outlet and keep the cables parallel with each other. Most alien crosstalk appears within 20 m away from the outlet. To reduce alien crosstalk, do not bundle cables in the first 5 m to 20 m.
    • If cables need to be bundled, bundle cables with cable ties placed every 150 mm to 300 mm. Leave sufficient slack when bundling cables.
    • You are advised to add no more than 12 cables in a bundle. A bundle cannot have more than 24 cables.
    • Replace Category 6 connectors with Category 6A connectors.
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Updated: 2019-03-21

Document ID: EDOC1000036822

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