Forum Discussion

Aspirant

Oct 30, 2017

M4300-52G-PoE+ loop error

Hello, i have a stack of 2 netgear m4300 switches. i also have a second stack of 2 m4300 switches. these stack is connected with a lag to the first stack. on the second stack is port 51 of each swi...

Troubleshooting

Retired_Member

Oct 31, 2017

Hi knarfer

As all of switches in your network support STP protocol, so we suggest disable L2 Loop Protection function, the STP function will protect no loop in the network topology.

By the way, the L2 Loop Protection function is used for the scenario that access switch not support STP(such as: connect one hub).

If you enable STP and L2 Loop Protection, it maybe cause some unpredictable errors.

Hope it helps!

knarfer

Aspirant

Oct 31, 2017

I disable L2 loop protection, still the errors appear in the log

Retired_Member
Nov 01, 2017
Hi knarfer

Could you please provide the tech-support file to us for further analysis?

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
- Retired_Member
  Nov 07, 2017
  Hi knarfer
  
  I notice that L2 Loop Protection is enabled on all ports.
  
  interface 1/0/34
  keepalive
  keepalive action log
  exit
  
  So could you please remove 'keepalive' and 'keepalive action log' for all ports, and try again.
  
  Thanks.
  - knarfer
    Aspirant
    Nov 09, 2017
    Hi Eric,
    i change this to disabled:
    
    still the same,
    regards
    Frank