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Forum Discussion
M4300 stacking problems
I'm trying to create an 8 switch spine and leaf stack with two XSM4324S (M4300-12X12F) and six GSM4352PB-100NES (M4300-52G-PoE+) and I'm having some major issues. The stack created fine with 7 of the...
Hi Greg,
Looks like a STP BPDU storm appeared in this topology of port LAG 1 on Stack_1.
lag 1 D-Disable Down Disable N/A Disable lag 2 Enable Up Enable N/A Disable lag 3 Enable Up Disable N/A Disable lag 4 Enable Up Disable N/A Disable
So the port which get many STP BPDU packets will shutdown as D-Disable.
I suggest to check the link first if any loop exist probably.
1. Check the link of Stack_2 .
2. Check the link of Stack_1 .
3. Check the link between Stack_1 and Stack_2.
If the error appeared all the same after the loop disappear.
The best way to resolve your concern is creating online support case form here about stack configuration and PVSTP design.
The BPDU storm I definitely noticed and corrected by removing the LAG between CORE and ACCESS stacks for now until the stacking issue is corrected. There is currently only a single uplink between the stacks which seems to be working just fine. As I said previously, the LAG isn't what I'm currently having an issue with or why I created this thread. My problem is the stacking issue where switches added to the stack will not forward traffic once they're stack members. The 1G ports are greyed out in device view. No activity lights come on on the switch except the stack ports.
The stacking problem and the LAG problem are independent problems. The LAG issue was a configuration error I'm sure, but I don't think the stacking problem is. I received a PM from AlexPe regarding the stacking issue on Thursday with an internal ticket number and questions regarding the TS file he had been provided, but it was for the CORE stack, which I'm not having any stacking issues with. I provided him with the correct TS file from the ACCESS stack and additional detailed information, but have not heard back yet.
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