We are trying to figure out a command to identify whether a SFP is plugged in on the SFP port of the inbuild gigabit ethernet port on the Cisco 3845 router.
Any help is really appreciated.
Anantha Subramanian Natarajan
LX and LH are two different standards with not much of a difference.
1000BASE-LX is a fiber optic gigabit Ethernet standard specified in IEEE 802.3 Clause 38 which uses a long wavelength laser (1270 to 1355 nm), and a maximum RMS spectral width of 4 nm.
1000BASE-LX is specified to work over a distance of up to 5 km over 10 Âµm single-mode fiber.
1000BASE-LX can also run over multi-mode fiber with a maximum segment length of 550 m.
1000BASE-LH is a non-standard but industry accepted term to refer to gigabit Ethernet transmission using 1300 or 1310 nm wavelength. It is very similar to 1000BASE-LX, but achieves longer distances up to 10 km over single-mode fiber due to higher quality optics. 1000BASE-LH is backwards compatible with 1000BASE-LX.. Some vendors, like Cisco, use the term LH as a synonym for LX.