difference between nego-fail and lacp-up event

Showing results for 
Show  only  | Search instead for 
Did you mean: 

difference between nego-fail and lacp-up event

L3 Networker

Multiple logs are generated for LACP on passive firewall , but not sure whether this event generated due to layer 1 issue or config issue at switch end. We never faced this king of issue , this log are generated all of a sudden on passive firewall. 

Looking for exact meaning for below events . PFA image

1. Link-down

2. nego-fail

3. lacp-up



there is link-down event on firewall which can be physical port issue , but also nego-fail event also generated for same port so not sure whether the port was down or issue in lacp. This event is occurred 3 times on all interfaces of firewall (eth1 - eth12) , but nego-fail event occurred only for eth1/5 in first occurrence and on eth1/13 on second occurrence. Due to this behavior not able to find exact issue. 


L4 Transporter



maybe this info will be helpful for your troubleshooting:

a "nego-fail" event will not be generated if the Interface is down.

what could make LACP flip up and down like this, is that your Firewall LACP configuration uses Fast Transmission Rate. try using "Slow" Transmission.


you can check LACP logs on firewall which are logged during these events in l2ctrld.log, these would be helpful

less mp-log l2ctrld.log


  • 1 replies
  • 101 Subscriptions
Like what you see?

Show your appreciation!

Click Like if a post is helpful to you or if you just want to show your support.

Click Accept as Solution to acknowledge that the answer to your question has been provided.

The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!

These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!

The LIVEcommunity thanks you for your participation!