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Internet stops working when switches are connected using LAG - JGS524PE & JGS516PE
Hi all,
Having an issue where the internet stops working when we connect a JGS524PE & JGS516PE via a 2 port LAG.
The JGS524PE is the main switch in a detatched office and the JGS516PE runs a few cameras and internet for the main house.
I have set up a LAG on the JGS524PE to connect to a two nic NAS box which seems to run fine! I then setup a new LAG on both of the switches to interconnect them. As soon as you physically connect the second port the internet connection in the office stops. Disconnect and it is back up straight away! I think this happens which ever port is connected!
Network cables between the office and the house are Cat6
Just not sure what is going on! Any ideas or suggestions would be great....
XavierLL wrote:Just a couple of things that hope helps you when you are onsite:
Configure first the switches without any of the LAG cables connected, and once you have configured both plug in the cables
Will Do!
If after configuring it you still have issues please change the cable and the port as a physical issue could also cause that the LAG is down
As far as I can remember each port works normally when the other is disconnected! Issue is the second switch is in a pain of a spot to get to (in the roof space in a small data cabinet) so the whole process of pysically patching cable is a slow process.
9 Replies
Hi Sam71,
Welcome to our community!
From your problem described below seems that instead of creating the LAG between the switches a loop is created. So that will explain why you loose internet access when you connect the second cable.
Could you check that you also enabled the LAG in both switches, see an image below:
Hope it helps!
Xavier Lleixa
NETGEAR CBU PLM
Thanks for your reply Xavier,
The only thing I did notice is that Admin mode would not stay active after I selected it!
i.e. it would be back to Disabled once I went back in.
I am quite sure that the LAG ports are the ones connected on each switch, I am going back to site on Monday!
I am thinking unless I can get the admin mode to enable I am going to be going in circles like the data traffic! :smileyhappy:
You are welcome Sam71!
Just a couple of things that hope helps you when you are onsite:
- Configure first the switches without any of the LAG cables connected, and once you have configured both plug in the cables
- If after configuring it you still have issues please change the cable and the port as a physical issue could also cause that the LAG is down
Hope it helps!
Xavier Lleixa
NETGEAR CBU PLM
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