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MS225 Port shuts down with third party switch

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MS225 Port shuts down with third party switch

We have a Dell Powerconnect switch plugged into one of our ports on a Meraki MS225.  Throughout the day the port on the Meraki MS225 where the Dell is plugged in will shutdown/disable.  Years ago when I was using Cisco Catalyst switches I recall having to disable a setting on the ports with 3rd party switches.  What would that be on the Meraki MS225?

1 ACCEPTED SOLUTION

Accepted Solutions
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Getting noticed

Re: MS225 Port shuts down with third party switch

Go to the port settings in Switch | Switch Ports and disable both RSTP and STP guard.

View solution in original post

10 REPLIES 10
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Meraki Employee

Re: MS225 Port shuts down with third party switch

Hi @JordanNolan Do you BPDU guard enabled on that port by any chance?

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Re: MS225 Port shuts down with third party switch

STP Guard is set to Disabled (default)

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Kind of a big deal

Re: MS225 Port shuts down with third party switch

it says nothing is connected or does the port give you a message? any logging on both devices related to this event that you can share with us?

is it a trunk port or a access port?

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Re: MS225 Port shuts down with third party switch

The port is Trunk. I catch it intermittently so I do not see if the port is dark on the dashboard or anything.  It just acts as though it is turned off:

 

Here are some logs.  Same thing over and over:

 

Jul 9 07:07:42 Port STP change
Port 8 disabled→designated
Jul 9 07:07:42 Port status change
port: 8, old: down, new: 1Gfdx
Jul 9 07:07:37 Port STP change
Port 8 designated→disabled
Jul 9 07:07:37 Port status change
port: 8, old: 1Gfdx, new: down
Jul 9 07:07:33 Port STP change
Port 8 disabled→designated
Jul 9 07:07:33 Port status change
port: 8, old: down, new: 1Gfdx
Jul 9 07:07:29 Port STP change
Port 8 designated→disabled

 

 

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Meraki Employee

Re: MS225 Port shuts down with third party switch

That seems like the port is flapping. Can you try a different cable or different port on both sides and see if the problem still exists?

If you found this post helpful, please give it kudos. If my answer solved your problem, click "accept as solution" so that others can benefit from it
Highlighted
Getting noticed

Re: MS225 Port shuts down with third party switch

Go to the port settings in Switch | Switch Ports and disable both RSTP and STP guard.

View solution in original post

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Here to help

Re: MS225 Port shuts down with third party switch

Hi Raj,

Was still an issue.  Patch cables tested OK on both a meter and through the console.  

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Re: MS225 Port shuts down with third party switch

I will give that a try and see if it stablizes

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Re: MS225 Port shuts down with third party switch

I had the same issue and disable RSTP and RSTP Guard resolved it. 

 

I had a remote switch connected through an ISP provided L2 circuit, managed by their Cisco switch.  Uplink was up/down frequently.  Disabling RSTP on the remote switch's Uplink port stabilized things.  Should I also disbale RSTP on the core-side switch port?

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Here to help

Re: MS225 Port shuts down with third party switch

I had the same issue and disable RSTP and RSTP Guard resolved it. 

 

I had a remote switch connected through an ISP provided L2 circuit, managed by their Cisco switch.  Uplink was up/down frequently.  Disabling RSTP on the remote switch's Uplink port stabilized things.  Should I also disbale RSTP on the core-side switch port?

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