Thanks for the reply. I do not want to aggregate ports for the stack. Stack wants to use to manage only. I need to increase the speed between the same vlan on different switchach . Can I use the stack and the lag. Or did i must destroy stack and configure stand alone units ?
No, the spanning-tree will put the second lag in to a blocking status.
Stack unit 1 = Lag 1 using gi2/3
Stack unit 2 = Lag 2 using gi2/3
When you create the LAGS, you will notice you can choose the stack ID to associate the port to the LAGS. If you use LAG1 from unit 1, the ports will transpose to the unit 2 LAG1. That's why the LAG ID can't be the same.
If you look at the spanning-tree interface then hit the radio button for LAG you will see LAG 1 will be forwarding, LAG 2 will be blocking.
You have to view a stack as 1 whole device. It is the equivalance of having 1 switch and running 1 wire from port 1 to port 2, it will get shut down.
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