cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

SFP+ ports getting disabled

Highlighted
New here

SFP+ ports getting disabled

Does anyone have any advice for this weird issue?

 

I've got a MS420-24 connected to a few MS320-48LP in my network rack; one of the MS320's keeps dropping out when connected via SFP+ DAC, but is happy when connected via ethernet.

 

I've tried switching ports at each end, and have tried replacing the cable multiple times.

 

Here is my port config on the MS420

Screen Shot 2019-06-27 at 2.05.48 PM.png

 

Jun 27 12:42:00 Port STP change
Port 17 designated→disabled
Jun 27 12:42:00 Port status change
port: 17, old: 10Gfdx, new: down
Jun 27 12:41:59 Port STP change
Port 17 disabled→designated
Jun 27 12:41:59 Port status change
port: 17, old: down, new: 10Gfdx
Jun 27 12:40:52 UDLD alert
port: 17, state: unknown, port_blocked: false
Jun 27 12:40:11 Port STP change
Port 17 designated→disabled
Jun 27 12:40:11 Port status change
port: 17, old: 10Gfdx, new: down
Jun 27 12:40:11 UDLD alert
port: 17, state: unidirectional (outbound fault), port_blocked: true
Jun 27 12:40:05 Port STP change
Port 17 disabled→designated
Jun 27 12:40:05 Port status change
port: 17, old: down, new: 10Gfdx
Jun 27 12:39:56 Port STP change
Port 17 designated→disabled
Jun 27 12:39:56 Port status change
port: 17, old: 10Gfdx, new: down
Jun 27 12:39:54 Port STP change
Port 17 disabled→designated
Jun 27 12:39:54 Port status change
port: 17, old: down, new: 10Gfdx
Jun 27 12:39:52 Port STP change
Port 17 designated→disabled
Jun 27 12:39:52 Port status change
port: 17, old: 10Gfdx, new: down
Jun 27 12:39:51 Port STP change
Port 17 disabled→designated
Jun 27 12:39:51 Port status change
port: 17, old: down, new: 10Gfdx
Jun 27 12:39:48 Port STP change
Port 17 designated→disabled
Jun 27 12:39:48 Port status change
port: 17, old: 10Gfdx, new: down
Jun 27 12:39:46 Port STP change
Port 17 disabled→designated
Jun 27 12:39:46 Port status change
port: 17, old: down, new: 10Gfdx
Jun 27 12:39:44 Port STP change
Port 17 designated→disabled
Jun 27 12:39:44 Port status change
port: 17, old: 10Gfdx, new: down
Jun 27 12:39:42 Port STP change
Port 17 disabled→designated
Jun 27 12:39:42 Port status change
port: 17, old: down, new: 10Gfdx
Jun 27 12:39:11 UDLD alert
port: 17, state: unknown, port_blocked: false
Jun 27 12:38:21 Port STP change
Port 17 designated→disabled
Jun 27 12:38:21 Port status change
port: 17, old: 10Gfdx, new: down
Jun 27 12:38:21 UDLD alert
port: 17, state: unidirectional (outbound fault), port_blocked: true
8 REPLIES 8
Highlighted
Kind of a big deal

Re: SFP+ ports getting disabled

Only the MS320? And you're tried different DACs? Smells like a bug to me. Maybe call into support and get them to take a look. 

Highlighted
Kind of a big deal

Re: SFP+ ports getting disabled

Is it a Meraki DAC cable?

Highlighted
New here

Re: SFP+ ports getting disabled

Ooh, no it's not; I didn't think of that. All my other links are working fine on generic DAC cables
Highlighted
Kind of a big deal

Re: SFP+ ports getting disabled

It is going to be tricky getting help from support.  Is the DAC cable 3m or less in length?

 

I would make sure you are on currently firmware like @jdsilva suggested as well.

Highlighted
New here

Re: SFP+ ports getting disabled

Yep! 1m

 

And yep, I'm running all current firmware.

 

Yarrrr

Highlighted
Kind of a big deal

Re: SFP+ ports getting disabled

I think I would try the firmware update, and then buy one Meraki DAC cable, plug it in, and then contact support.

Highlighted
Kind of a big deal

Re: SFP+ ports getting disabled


@PhilipDAth wrote:

I think I would try the firmware update, and then buy one Meraki DAC cable, plug it in, and then contact support.


+1. It's only $100 list (MA-CBL-TA-1M).

Highlighted
Building a reputation

Re: SFP+ ports getting disabled

https://www.1stop.com/meraki-10-gbe-twinax-cable-with-sfp-modules-1-meter.html?language=en&currency=...

 

$62.64

 

good idea...the brown portion in the connectivity bar usually means "high proportion of CRC errors"

Welcome to the Meraki Community!
To start contributing, simply sign in with your Cisco account. If you don't yet have a Cisco account, you can sign up.