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Problems with LAG von M4300-8x8F switches
Hello,
we have 4 M4300-8x8 Switches in two server rooms. In both rooms there are 2 Switches stacked together. These two stacks are connected by LAG (one cable per switch). Originally the LAG consisted of two SFP+ and it worked fine. Now we had to plug out the fibre cables so I included two copper ports in the LAG (again one per switch), plugged in two copper cables and removed the fibre cables. When I added the fibre cables again, I got all sorts of connection problems. Some servers could not reach other servers, but others worked. After a while I decided to plug out the fibre cables again, but the problems persisted, until I plugged out one of the copper cables. At the moment it works, but only with one active link in the lag. Since the servers are all productive I cannot just shut everything down. Are there some settings I should set in the LAG? I have left everything on default, admin mode enabled, and Link, STP, static disabled. I also had an expert test the fibre cables - the cables themselves should be ok.
My goal would be to have a working lag with two fibre cables. The copper cables are only for emergencies.
Thank You,
Peter
Hello,
thank you for the reply. I only tried Hash mode 7 after I encountered the problems. But I will of course set it back to 3.
I will try to reboot the switches on the weekend. Then I will be able to use the new firmware and the lag will probably work anyway.
Thank you for your help!
8 Replies
Hi ptoschi,
Welcome to the community!
First, you need add all ports as LAG members on Switch, include fiber port and copper port. And the up ports member will change to active port, and will forwarding traffic. And other config for LAG just keep default.
So please run CLI commad as below to check LAG members:
'show port-channel 1'
Hope it helps!
Regards,
EricZ
NETGEAR employeeHello,
the 4 ports in question are all members of the lag group:
1/0/1, 1/0/9, 2/0/1, 2/0/9 1/0/9 The problem is, if i connect more than one port on the fly, I get connection errors. It worked fine in the beginning so I suspect it would work again if i gut shut down the switches, connect the lag ports and then start up the switches again. Unfortunately that is not possible at the moment and I would expect the lag group to accept changes on the fly.
By the way, the CLI command did not work (it would not accept the "1" after the command, but I can see everything in the web interface.
Thank You,
Peter
Hi ptoschi,
For further analysis, Could you please provide the tech-support file of the Switch? Include two stacking switches.
How do I send tech-support files from my Managed Switch to NETGEAR community moderators?
http://kb.netgear.com/app/answers/detail/a_id/31439
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