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Switch was detected that improperly forwards LLDP Packets

Getting noticed

Switch was detected that improperly forwards LLDP Packets

We have one network with two switches plugged directly into the firewall Mx84. Upon looking at the topology for this network, there is a red diamond on the leg to the second switch. The message, when the cursor is hovered over it is, "A switch was detected that improperly forwards LLDP packets. This can cause your network topoplogy to be incomplete or incorrect." 

 

I read somewhere that you should not connect more than one switch to the firewall, and that switches should be connected to each other. Is this correct? Also how do I solve this issue. 

 

 

Thanks in advance.Topology.JPG

12 REPLIES 12
Kind of a big deal

Re: Switch was detected that improperly forwards LLDP Packets

This usually means there is a dumb layer 2 switch in the mix somewhere.

Kind of a big deal

Re: Switch was detected that improperly forwards LLDP Packets

Yes as Phil mentioned you either have something between the MX and MS unit. If not try rebooting them both and see if it comes right. If that doesn't work Open a support case.

 

Just another quick thought you haven't recently added the MS unit on the link thats reporting the error have you? it could simply be the dashboard hasn't updated yet. 

Meraki CMNO, Ruckus WISE, Sonicwall CSSA, Allied Telesis CASE & CAI
Getting noticed

Re: Switch was detected that improperly forwards LLDP Packets

The MS unit was there prior to adding the second switch that is giving the error

 

Just browsing

Re: Switch was detected that improperly forwards LLDP Packets

Do you have pair of MX's and are those directly connected together with cable? Recommended topology is that there is not direct connection between MX's. https://documentation.meraki.com/MX/Deployment_Guides/MX_Warm_Spare_-_High_Availability_Pair#Fully_R...)

Getting noticed

Re: Switch was detected that improperly forwards LLDP Packets

Hi #Mike_Rapp! Did you solve this?

Highlighted
Getting noticed

Re: Switch was detected that improperly forwards LLDP Packets

I am seeing similar thing on my network:

Meraki Topology.PNG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Does Sonos devices caused STP issues since they are connected via ethernet and also WiFi?

 

Getting noticed

Re: Switch was detected that improperly forwards LLDP Packets

Hi there all,

 

I have just done a virgin install of an MX84, MS120/24 and MS120/8 and am seeing the same error / issue, I have no dumb switches or anything else in the mix, thoughts would be appreciated.

 

Screenshot 2019-02-08 at 10.24.54.png

Here to help

Re: Switch was detected that improperly forwards LLDP Packets

I have the same issue.

I have Three MS120 Switches connected to the MX84.

And the red diamond moves between them when i refresh the screen!

Two screenshots below for reference.

Im thinking this means that the MX does not like having multiple MS120 switches connected to it perhaps?

 

2019-02-21 09_49_25-Meraki Dashboard.png

2019-02-21 09_51_20-Meraki Dashboard.png

Conversationalist

Re: Switch was detected that improperly forwards LLDP Packets

Hello,

 

could you solve the issue in your installation?

I‘m facing the same with a MX84.

 

Kind regards,

Stefan

Building a reputation

Re: Switch was detected that improperly forwards LLDP Packets

me too
Here to help

Re: Switch was detected that improperly forwards LLDP Packets

I did indeed solve mine.

I put a pair of MS210 switches in the mix acting as Agg Switches in a Physical Stack.

Now i get a consistent topology page with no LLDP errors.

The main thing i dont like now, is that it makes it look like the MX device is downstream of the switch stack instead of being upstream of the switch stack.

But apart from that, no issues

 

Topology.png

Getting noticed

Re: Switch was detected that improperly forwards LLDP Packets

I have the same issue. What up w/ that? There is an MX84 as the gateway and 3x MS-220-48fp...

 

Network Topology - ver3.png

 

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