Can the combo interface on the SRU connect to the 100M optical module

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Yes, the combo interface on the SRU can connect to the 100M optical module. When the combo interface on the SRU connects to the 100M optical module, it does not support auto-negotiation mode, so the peer device must use the 100M optical module and the peer interface must be manually configured to work in full duplex mode.

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.

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 combo port on an S series switch support 100M optical modules
For S series switches, optical ports of combo ports support 100M optical modules.

Does the S5700 interface support 100M optical modules
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.

The state of an optical interface is not Up when it interconnects with the peer device
For the problem that the state of an optical interface is not Up when it interconnects with the peer device, see the troubleshooting guide. For details, access the URL in the right column.

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