SFP Speed

  • 1
  • Question
  • Updated 4 years ago
  • Answered
We have a handful of customers that are using Aerohive switches.  I do
not believe we are using the Aerohive SFPs though and we're seeing some
odd Alarms on the switches.

Alarm:
Warning: current SFP module doesn't support this speed, portindex = 27

show int1/28 (portindex starts at 0?) shows:
Port Name: eth1/28; Port Type: SFP;
SFP speed: 1200Mbps; media: Unknown; type: 1000Base-SX; vendor: US

I am still digging up the exact specifics on the SFPs we're using, but
is this a cause for concern or just more informational alarms?

Photo of Brian Powers

Brian Powers, Champ

  • 396 Posts
  • 92 Reply Likes

Posted 4 years ago

  • 1
Photo of Andrew Garcia

Andrew Garcia, Official Rep

  • 368 Posts
  • 120 Reply Likes
I will ask around about the alarm and post anything I learn.  One question:

Can you replicate the alarm with an Aerohive SFP?

Photo of Brian Powers

Brian Powers, Champ

  • 396 Posts
  • 92 Reply Likes
I cant even replicate it with any consistency with the 3rd party SFPs were using.  I dont know if we have any Aerohive branded SFPs to attempt it with.  It was more of just an inquiry as to if it had been seen by anyone before.

I'm still unsure as to what SFPs we are using in the switches.
Photo of Andrew Garcia

Andrew Garcia, Official Rep

  • 368 Posts
  • 120 Reply Likes
I talked with some folks in engineering, and they thought it sounded like it might be a dual rate SFP+ that supports 1.0625 Gbps and 1.2 Gbps. Avago, maybe?

 We are rated for 1 Gbps (1.0625 actually) or 10G (platform dependent), but not 1.2 Gbps.  

It sounds like the SFP works, is that correct?

I would surmise we auto sense the SFP supports 1.2, but since we don't support that rate, we throw up that error message and renegotiate to 1 Gbps.

You can probably leave things alone and things will continue on fine.  If the notices bother you, you could try manually setting the speed on the port to 1 Gbps and see if the alerts stop.  

One thought: Since you work with several Aerohive switch customers, I would recommend keeping a one/a few Aerohive SFPs with you for troubleshooting.  If issues arise with 3rd party SFPs, you can also see if the the issue can be replicated with the SFPs that Aerohive supports.
 


(Edited)
Photo of Robert Haviland

Robert Haviland

  • 3 Posts
  • 1 Reply Like
I have some of your SFPs. The part number is GLC-SX-MM-US. The label says 1000 Base - SX SFP MMF 850nm, 550m, LC.
Photo of Roman Kern

Roman Kern

  • 16 Posts
  • 1 Reply Like
Hey all, I need to get SFP modules for my two Aerohive switches - any recommendations? Can I use cisco-compatible ones?

Thanks and best,
Roman
Photo of Amanda

Amanda

  • 396 Posts
  • 25 Reply Likes
Deserved its own (new) thread. Please reference the new topic here: Recommended SFP modules for my two Aerohive switches?
Photo of Terrance McBride

Terrance McBride

  • 1 Post
  • 0 Reply Likes
The  copper SFP ports or 10G SFP ports have a good speed on the Alteon platform. For more http://www.fiberstore.com/c/sfp-transceivers_57