Can S6700 10000M port connect to the 1000M optical module

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S6700 10000M port can connect to the 1000M optical module.
In V100R006C00SPC800, when the S6700 10000M port connects to a GE optical module, the port rate switches to 1000M and works in non-auto-negotiation mode. If the 10000M port connects to the 1000M optical port on the peer device, the 10000M port can become Up only when the peer device works in non-auto-negotiation mode. After the S6700 has V100R006SPH005 installed and the S6700 10000M port connects to a GE optical module, you can run the negotiation auto command to switch the port to auto-negotiation. In this case, the 10000M port can connect to the 1000M optical port in auto-negotiation mode.
In later versions of V100R006C00SPC800, when the S6700 10000M port connects to a GE optical module, the port rate switches to 1000M and works in auto-negotiation mode.

Other related questions:
Can 1000M optical interface boards use 100M optical modules
Optical interfaces work at a rate of 1000 Mbit/s by default and do not support auto-negotiation. You must manually configure optical interfaces to work at a rate of 100 Mbit/s.

Does the S6700 provide only optical ports
Ports of two S6700EI models are all 10GE optical ports. These ports can function as GE electrical ports when they have GE copper modules installed. The S6720EI and S6720S-EI have 10GE optical ports and 40GE optical ports. 10GE optical ports can function as GE electrical ports when GE copper modules are installed. You can use Enterprise Network Product Hardware Query Tool to query specified models.

Can I use a GE optical module on a 10GE optical port or a 100M optical module on a GE optical port
A high-speed optical port supports low-speed SFP, eSFP, and SPF+ modules. Generally, optical ports on a modular switch support low-speed optical modules. However, on a fixed switch, downlink optical ports support low-speed optical modules, but uplink optical ports do not. You can use a GE optical module on a 10GE optical port or a 100M optical module on a GE optical port. NOTE: Normally, you are not advised to install a low-speed optical module on a high speed optical port.

Can GE optical ports use 10GE optical modules
GE optical ports of the switch cannot use 10GE optical modules. Similarly, 100M optical ports cannot use GE or 10GE optical modules.

Which type of optical module is used by the MCU optical port: single-mode or multi-mode optical module? How can I choose the optical module?
The MCU board supports only the SFP optical module. Set the IP address to the IP address of GE0 port. Whether an optical module is a single-mode or multi-mode optical module is determined by its optical module attribute settings. To use an optical module, set the attribute to optical port module. When an optical module connects to an optical port, the system automatically switches to the optical port module mode. By default, the multi-mode optical module is delivered with the product. The customer can choose a single-mode optical module if required during the order process. The optical module, like network cables, is not the default configuration; therefore, you need to purchase one. If you select the optical module, the multi-mode optical module will be delivered and charged by default.

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