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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....
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.
Re: Internet stops working when switches are connected using LAG - JGS524PE & JGS516PE
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:
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.
Re: Internet stops working when switches are connected using LAG - JGS524PE & JGS516PE
Looks like I spoke to soon!
Aparently the internet (netflix etc.) is now not working in the house. It is fine in the office which is now connected via LAG.
The cameras are also working fine! It is like the traffic is only going one way over the LAG.
I am just thinking it may be better to create a Vlan on the second switch (in the house) and connect this directly to a lan port on the modem router, and give up on the LAG connection. This would separate the cameras away from the network in the house.
Re: Internet stops working when switches are connected using LAG - JGS524PE & JGS516PE
Hi Sam71,
Could you let us know what is the traffic that is not working now? if you don't have VLANs or any other security features implemented the LAG shouldn't be an issue.
Re: Internet stops working when switches are connected using LAG - JGS524PE & JGS516PE
It turns out that the modem was offline, after a power off and on it is all working fine!
I guess this will be an issue in the future as the modem is in the office and not the house! Hopefully by the end of the week they will have a UPS installed!
