Are the optical transceivers for 4 Gbit/s FC, 8 Gbit/s FC, and 10GE port modules mutually swappable?


No, they are not.

If you do so, the port modules may become unavailable.

Other related questions:
Common working modes of 10GE optical transceivers
The common working mode of the 10GE optical transceiver is subject to the transmission media. For example, M and N in 10GBASE-(M)(N) indicate the corresponding transmission media. The common situation is as follows: M indicates: -S: short wavelength (850 nm, multi-mode) -L: long wavelength (1310 nm, most being single-mode and a few being multi-mode) -E: extended wavelength (1550 nm, single-mode) -T: twisted pair -C: coaxial cable (copper) -K: backplane N indicates: -X: 8B/10B coding -R: 64B/66B coding -W: STS-192 encapsulation 64B/66B coding (SONET) parameter 2 -M indicates multi-mode in -LRM. The digit attached to the end indicates the number of lanes, such as CX4 and -LX4. In summary, common 10GE optical transceivers on the firewall usually use SR (working with a wavelength of 850 nm, multi-mode, and 64B/66B coding) and LR.

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.

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.

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