C9300 IOS Tengig interface

[COLIN]

Hi Forum,

I have a C9300-48U-E with a NM x8 that supposedly supports an SFP for a 1Gb interface, the SFP (GLC-LH-SMD - 1000BASE-LX/LH (1Gb) I'm using is recognised by this 10Gb module, but the interface name is Tengigabitethent1/1/1.

Has anyone experience of this hardware setup that could verify that under the interface cli there is no renaming necessary or that this will work (I don't have an end to end link yet) to a 4503 with a Gigabit Ethernet interface?

Regards

[balaji.bandi]

you can not change the interface ten1/1/1 (that is normal), make sure you set up the speed and use no auto negotiation, should be ok.

even though interface ten gig it has back-compatibility and i was tested this.  show interface ten1/1/1 trans

[COLIN]

Many thanks Balaji, what i want to hear

[Kasun Bandara]

yes. even 1G SFP also using tengig naming for configurations. that is OK.

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/hardware/install/b_c9300_hig/b_c9300_hig_chapter_011.html#reference_1313295B1F364ECEA18A305B21908F00

[COLIN]

Many thanks Kasun thank you for the link

[Leo Laohoo · Accepted solution]

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@COLIN wrote:

I have a C9300-48U-E with a NM x8 that supposedly supports an SFP for a 1Gb interface, the SFP (GLC-LH-SMD - 1000BASE-LX/LH (1Gb) I'm using is recognised by this 10Gb module, but the interface name is Tengigabitethent1/1/1.

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This happens if the switch is running a very old config.  In newer release, this behaviour has been changed.  Gig, Ten, Twe, Forty, Hun are now visible in the "sh interface status", regardless if there is an optic inserted or not.  

In old software version, this will depend on the type of optics inserted and will show up accordingly, i.  e.  if the optics inserted is SFP, then the "sh interface status" output will show Gig.  If the optics inserted is SFP+, then the output will show "Ten".  Without any optics, the port will show up as "Ten".

[COLIN]

Many thanks Leo, very helpful

[balaji.bandi]

if the optics inserted is SFP, then the "sh interface status" output will show Gig.  If the optics inserted is SFP+, then the output will show "Ten".  Without any optics, the port will show up as "Ten".

@Leo Laohoo just for clarity for my understating, what IOS code does this output show as (when we inserted gig SFP show gig, when we inserted 10G show ten ?

especially when we use 8X module on Cat 9300 switches?

[Leo Laohoo]

Ok, I think I got my facts wrong.  

I have a stack of 9300 (17.3.4, Install Mode) with C9300-NM-8X.  

Without any optics, the ports will show up as "Ten". 

With SFP+, it will show up as "Ten". 

But with an SFP, it will still show up as "Ten".  Instead of taking the config from the Gig port, the SFP takes the config of the "Ten". 

[COLIN]

Hi Leo, yes that is the conclusion i'm coming to as the 1Gb SFP was recognised under the TenG interfaces

Many thanks for your help and confirmation

Regards

Colin

[balaji.bandi]

yes that is what my testing today, after @Leo Laohoo  direction.

But found that all time does not matter what SFP, the port is Ten always.

@Leo Laohoo  thank you for your clarification, was wondering what i missed here.