Does the S5700 interface support 100M optical modules

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Fixed optical interfaces on the S5700-EI, S5700-SI, S5710-LI, and S5700-HI support 100M optical modules, while interfaces on extended front cards do not support 100M optical modules.
Combo optical interfaces and 100/1000Base-X optical interfaces on the S5700-LI and S5700S-LI series switches support 100M optical modules.
The S5710-EI series switches support 100M optical modules only on their combo optical interfaces.
Combo optical interfaces and 100/1000Base-X optical interfaces on the S5720-EI series switches support 100M optical modules.
In the S5720-HI series, only the S5720-32C-HI-24S-AC supports 100M optical modules on their 100/1000Base-X optical interfaces.
The S5720-SI series switches support 100M optical modules only on their combo optical interfaces.

Other related questions:
Does the Combo interface of an SRU support 100M optical modules
Yes. However, a Combo interface does not support auto-negotiation mode when a 100M optical module is inserted to it. Therefore, the peer device must be a 100M optical module that is manually configured to 100M full-duplex mode.

Does the S5700 support LRM optical modules
The S5700SI supports long reach multimode (LRM) optical modules since V100R006C00SPC800. The S5700EI 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.

Does the GE optical LPU of the S12700 support 100M optical module
The S12700's GE optical LPU supports both 100M optical modules and 1000M optical modules. When a 100M optical module is used, you must run the speed 100 command on the interface to set the interface rate to 100 Mbit/s. When using a GE optical module, an interface works at 1000 Mbit/s by default. If auto-negotiation is enabled on the interface, the interface speed cannot be set to 100 Mbit/s. If auto-negotiation is disabled, you can run the speed 100 command to set the interface speed to 100 Mbit/s. When two optical interfaces are interconnected, they must use the same type of optical module.

Does the GE optical LPU of the S7700&S9700 support 100M optical module
The S7700&S9700's GE optical LPU supports both 100M optical modules and 1000M optical modules. When a 100M optical module is used, you must run the speed 100 command on the interface to set the interface rate to 100 Mbit/s. When using a GE optical module, an interface works at 1000 Mbit/s by default. If auto-negotiation is enabled on the interface, the interface speed cannot be set to 100 Mbit/s. If auto-negotiation is disabled, you can run the speed 100 command to set the interface speed to 100 Mbit/s. The 100M optical interface can only use the 100M optical module, and the default interface rate is 100M. When two optical interfaces are interconnected, they must use the same type of optical module.

Why auto-negotiation cannot be configured after a 100M optical module is installed and then removed from a 100M/1000M optical interface on the S5700
On S5700 switches in versions earlier than V200R001, the default rate of 100M/1000M optical interfaces is 1000 Mbit/s. After a 100M optical module is installed on an optical interface, the optical interface automatically changes the rate to 100 Mbit/s. After the optical module is removed, the optical interface retains the 100 Mbit/s rate. When the rate of an optical interface is 100 Mbit/s, the interface does not support auto-negotiation. The auto-negotiation function cannot be configured. You can run the speed 1000 command or install a 1000M optical module to restore the interface rate to 1000 Mbit/s. On S5700 switches in V200R001 and later versions, the interface rate of a 100M/1000M optical interface restores the default rate 1000 Mbit/s after the optical module is removed.

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