mini-gbic OM2 linked with OM4 fiber

[CERKYR]

Hello,

We have many Cisco 9200L where many mini-gbic (non Cisco) compatible OM2 are linked with Optical Fiber Cable OM4.

(We have the message : "Length(Copper) : GBIC does not support 50 micron multi mode OM4 fibre"

What is your opinion on this architecture ?

What are the risks ?

Regards,

[balaji.bandi]

Cisco 9200L where many mini-gbic (non Cisco) compatible OM2 are linked with Optical Fiber Cable OM4.

is this cable mixed OM2 and OM4 ?

(We have the message : "Length(Copper) : GBIC does not support 50 micron multi mode OM4 fibre"

where do you see this message on switch ?

what kind of patch cables you using ?

check some reference :

https://community.fs.com/blog/advantages-and-disadvantages-of-multimode-fiber.html

[CERKYR]

Hello,

The optical fiber cables are OM4 only.

The message come from a Cisco command to inventory the network port used by the mini-gbic.

We use also OM4 for patch cable. (2 meters)

Regards,

[balaji.bandi]

Then Looks like the message come from mini-gbic

[Leo Laohoo]

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@CERKYR wrote:

OM2 are linked with Optical Fiber Cable OM4.

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The link will work but there will be line errors.

[CERKYR]

Hello,

Yes we have many errors (TX and RX), and after many months (12), we have more and more mini-gbic died.

died = we can see it in the "show int status", bu there's no more red light from the mini-gbic...then no network...

OK, then what happen inside the gbic ?

I search a technical explanation ...

[balaji.bandi]

gibic its just silicon chips which converts light to data (high level)

do you have any switch IOS Upgrade done any recently ?

[CERKYR]

All our Switch Cisco are updated regurlarly (2 or 3 times per year) and have the same version level.

"gibic its just silicon chips which converts light to data (high level)"

Not only , not so simple ...many specifications exists between many mini-gbics ...

[balaji.bandi]

Honestly never put that much time, what is inside gbic.

Some reference if you like to beyond that point :

https://en.wikipedia.org/wiki/Small_form-factor_pluggable_transceiver

https://ourtechplanet.com/sfp-transceivers-explained/

[CERKYR]

h t t p s :// w w w .stl.tech/optical-interconnect-products/optical-fibre/pdf/Differences_between_OM1__OM2__OM3__OM4_.pdf

"OM3 & OM4 require restricted launch
conditions provided by lasers/VCSELs to achieve high modal bandwidths in addition to
'overfilled launch'. Table 1 shows bandwidth and attenuation values of different types of OM cables."

[Janalima]

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@CERKYR wrote:

Hello,

We have many Cisco 9200L where many mini-gbic (non Cisco) compatible OM2 are linked with Optical Fiber Cable OM4.

(We have the message : "Length(Copper) : GBIC does not support 50 micron multi mode OM4 fibre"

What is your opinion on this architecture ?

What are the risks ?

Regards,

---

Fiber Optic Transceiver is a self-contained component that can both transmit and receive. Usually, it is inserted in devices such as switches, routers or network interface cards which provide one or more transceiver module slot. There are many optical transceivers types, such as SFP+ transceiver, X2 transceiver, XENPAK transceiver, XFP transceiver, SFP (Mini GBIC) transceiver, GBIC transceiver and so on

My Workstation Scentsy

[CERKYR]

The goal is just to know if a fiber OM4 is inserted inside a mini-gbic compatible OM2 (not compatible OM4) then what happen ?

[Leo Laohoo]

I no longer going to participate in this topic as it is obvious the objective of this thread is to push a "square peg into a round hole".