Does the S5700 Interface Support 100M Optical Modules?

The Huawei S5700 can use only the certificated optical modules. If an uncertificated optical module is used, an error may occur and Huawei is not responsible for it.

Yes, The S5700-LI (10GE optical ports) support LRM optical modules.

As for S5700, the S5700-SI supports long reach multimode (LRM) optical modules since V100R006C00SPC800. The S5700-EI supports LRM optical modules since V100R006C01.
The S5700-LI (10GE optical ports), S5710-C-LI (10GE optical ports), S5700-HI (10GE optical ports), S5710-EI (10GE optical ports), and S5720-EI (only 10GE optical ports on extended interface cards) support LRM optical modules.

An optical interface of the Huawei S5700 can be connected to an O/E converter.

Of course, you still need a license after the switches are stacked, and the installation method is different from that of a stand-alone machine. You can refer to this document.
https://support.huawei.com/enterprise/en/doc/EDOC1100195305

The reason is that no extended rear card is installed on the S5700.
An S5700-EI or S5700-SI can provide only two optical interfaces for a front card. If a 4-port front card is installed, an ETPB extended rear card must be installed to provide the other two ports. Otherwise, only two optical interfaces are displayed.
S5700 Switch Thunder link com

Fixed Switches Product Series Model AC and DC Power Module Mixing S3700/S5700/S6700 S3700-26C-HI Supported S5710-28C-EI Supported S5710-52C-EI Supported S5700-28C-HI Supported S5700-28C-HI-24S Supported S5700-EI (non-PoE) Supported in V200R005 S5700-SI (non-PoE) Supported in V200R005 S6700 Supported in V200R005 S5710-HI AC and DC power modules cannot be used together, but 350 W and 1150 W AC power modules can be used in one switch. S5720-HI Supported Modular Switches · When a switch does not use a PoE power module:
AC and DC power modules cannot be used together in the same type of power slots. Power modules with different power values cannot be used together either.
·
· When a switch uses a PoE power module:
Version PoE Power Module System Power Module V200R005C00 and earlier versions AC AC DC power module not supported - V200R006C00 and later versions AC AC DC DC AC DC ·
AC and DC power modules cannot be installed in the slots of the same type (system or PoE) in the same switch, and the power modules of different power values cannot be used in the same switch.
·


S5720 Switch Thunder link com

List of Cross-Connect Boards and System Control Boards T1PSXCSA,T2PSXCSA Super dual-plane cross-connect and synchronous timing board N4GSCC,N6GSCC System Control and Communication Board List of Packet Processing Boards N1PEX2 2-port 10 Gigabit Ethernet switching processing board N2PEX1 1x10GE Ethernet processing board N1PEG8 8-port Gigabit Ethernet switching processing board List of http://www.thunder-link.com/HUAWEI-OPTIX-OSN7500_p554.htmlPacket Interface Boards N1CQ1 4-port channelized STM-1 CES optical interface board N1PEFF8 8-port FE optical interface board N1PETF8 8xFE electrical interface board N1MD12 Multi-protocol 32xE1 interface board (120 ohms) N1MD75 Multi-protocol 32xE1 interface board (75 ohms) List of EoD Boards N1EDQ41
4-port 622/155 Mbit/s SDH optical interface Ethernet dual-mode multi-function processing board List of SDH boards N4SLD64> 2xSTM-64 optical
interface board N1SLD64 2xSTM-64 optical interface board N4SFD64 2xSTM-64 optical interface board with
the FEC function T2SL64, T2SL64A 1xSTM-64 optical interface board N1SF64, N1SF64A,
N4SF64 1xSTM-64 optical interface board
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N2SL16, N2SL16A 1xSTM-16 optical interface board N1SF16 1xSTM-16 optical interface board
(with the outband FEC function) N1SF16E 1xSTM-16 optical interface board
(with the outband EFEC function) N3SLH41 16xSTM-4/STM-1 optical interface board N3SLQ41 4xSTM-4/STM-1 optical interface board N1SLQ4, N2SLQ4 4xSTM-4 optical interface board N1SLQ4A 4xSTM-4 optical interface board N1SLD4, N2SLD4,
N1SLD4A 2xSTM-4 optical interface board N1SL4, N2SL4,
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interface board (LC) N2OU08 8xSTM-1 optical interface board (SC) N2SLO1, N3SLO1 8xSTM-1 optical interface board N1SLQ1, N2SLQ1 4xSTM-1 optical interface board N1SLQ1A 4xSTM-1 optical interface board N1SEP1 2xSTM-1 line processing board when interfaces
are available on the front panel
8xSTM-1 line processing board when interfaces are
available on the corresponding interface board N1SL1, N2SL1,
N1SL1A 1xSTM-1 optical interface board List of PDH board N2SPQ4 4xE4/STM-1 electrical processing board N1MU04 4xE4/STM-1 electrical interface board N2PQ3 12xE3/T3 service processing board N1D34S 6xE3/T3 electrical switching interface board N1C34S 3xE3/T3 electrical switching interface board N1PD3, N2PD3 6xE3/T3 service processing board N1PL3, N2PL3 3xE3/T3 service processing board N1PL3A, N2PL3A 3xE3/T3 service processing board
(Interfaces are available on the front panel.) N1PQ1 63xE1 service processing board N2PQ1 63xE1 service processing board N1PQM 63xE1/T1 service processing board N1D12B 32xE1/T1 electrical switching interface board N1D12S 32xE1/T1 electrical switching
interface board (120 ohms) N1D75S 32xE1 electrical switching
interface board (75 ohms) N1PFL1 8xE1 optical processing board N1TSB8 8-port electrical switching interface board N1DX1 DDN service accessing and converging board N3DX1 DDN service accessing and converging board N1DXA DDN service converging and processing board N1DM12 DDN service interface board List of EoS boards N1EFT8 8xFE/16xFE transparent transmission board N2EFT8 8xFE/16xFE transparent transmission board N1EFT8A 8xFE transparent transmission board N2EFT8A 8xFE transparent transmission board N1EFS0A 16xFE switching and processing board N2EFS0, N4EFS0,
N5EFS0 8xFE switching and processing board N1EFS4, N2EFS4,
N3EFS4 4xFE switching and processing board N1EAS2 2x10GE Layer 2 switching and
processing board N3EAS2 2x10GE Layer 2 switching and
processing board N1EGSH 16xGE switching and processing board N1EMS4 4xGE and 16xFE switching and
processing board N1EMS2 2xGE and 16xFE switching and
processing board N1EGS4, N3EGS4 4xGE switching and processing board N1EGT2, N2EGT2 2xGE transparent transmission board N2EGS2, N3EGS2 2xGE switching and processing board N1EFF8 8x100M Ethernet optical interface board N1EFF8A 8x100M Ethernet optical interface board N1ETF8 8x100M Ethernet twisted-pair interface board N1ETF8A 8x100M Ethernet twisted-pair interface board N1ETS8 8x10/100M Ethernet twisted pair
interface switching board List of ATM boards N1ADL4, N1IDL4 1xSTM-4 ATM service processing board N1ADQ1, N1IDQ1 4xSTM-1 ATM service processing board List of RPR boards N2EGR2 2xGE ring processing board N2EMR0 12xFE and 1xGE ring processing board List of SAN/Video Boards N1VST4 4-port video service transparent
transmission board N1MST4 4-port multi-service transparent transmission board List of Auxiliary Boards T1EOW Orderwire processing board T1AUX System auxiliary interface board N1FANA Fan board (high power) Lost of WDM board TN11CMR2 2-channel optical add/drop multiplexing board N1CMD2 2-channel bidirectional optical multiplexer and demultiplexer board TN11CMR4 4-channel optical add/drop multiplexing board N1MR2C 2-channel optical add/drop multiplexing board TN11MR2 2-channel optical add/drop multiplexing board N1LWX Arbitrary bit rate wavelength conversion board TN11MR4 4-channel optical add/drop multiplexing board N1FIB Filter isolating board N1MR2A 2-channel optical add/drop multiplexing board List of Optical Amplifier Boards and Dispersion Compensation Board N1BPA One-channel power amplifier and one-channel pre-amplifier board N2BPA One-channel power amplifier and one-channel pre-amplifier board N1COA, 61COA,
62COA Case-shaped optical amplifier N1DCU Dispersion compensation board N2DCU Dispersion compensation board TN11OBU1 Optical booster amplifier board TN12OBU2 Optical booster amplifier board N1BA2 Two-channel power amplifier board N1RPC01 Forward Raman driving board (external) N1RPC02 Backward Raman driving board (external) List of power boards UPM Uninterruptible power module T1PIU Power interface board (supporting standard subracks) T1PIUB Power interface board (supporting type III subracks) Huawei osn 7500 MSTP transmission sytem Thunder link com

The reason is that this interface works in half duplex mode.
On a switch such as S5700-28P-LI-AC, S5700-28P-PWR-LI-AC, if the rate of an interface is the same as that of member interfaces in an Eth-Trunk, this interface can be added to the Eth-Trunk. However, if this interface works in half duplex mode, the Eth-Trunk will not select it as the working interface.

Fault Symptom The outbound interface of the switch joins a VLAN in untagged mode. When the remark 802.1p command is configured on the outbound interface, the configuration is invalid.
Cause Analysis The configuration of the S5700(such as S5700-28P-LI-AC)is as follows:
#
traffic classifier test
if-match any
traffic behavior test
remark 8021p 2
traffic policy test
classifier test behavior test
#
interface GigabitEthernet1/0/1
port link-type access
port default vlan 10
traffic-policy test outbound
#
The outbound interface joins a VLAN in untagged mode, so VLAN tags are removed from packets sent by the interface.
Conclusion To apply traffic policy defining remark vlan to the outbound interface, ensure that the interface joins a VLAN in tagged mode.