Does disabling LACP affect service?

[IgorN]

Hi all, I tried to continue existing similar topic but perhaps it is better to start a new one.
I have 2x VSP7200 stacked switches connected with 4x10G ports in a LAG to a Cisco VHS cluster, at Cisco end it is a single PortChannel. Now we need to add new VLANs to this LAG and for that we have to disable and re-enable LACP on both VSP switches. Is this service-affecting? Obviously it will happen out of hours, but if it is affecting then the change window and amount of regression testing on the apps side, and overall perceived risk will be much larger.
Thanks!

[EXTR_Paul]

Yes, you will see a service impact because disabling LACP can create a loop.

I would disable the port on one side of the network and force a failover to the single link.
You can now disable LACP, make your vlan change, re-enable LACP and re-endable the port.

repeat for the other side of the network.