[f-nsp] MLX-CER LAG issues (1 port LACP-BLOCKED)?

[Tim Warnock]

> Logs from cor2 show the link coming up, the 1/19 remaining LACP_BLOCKED:
> 
> Apr  5 14:20:49:I:STP: VLAN VLAN: 5  - Bridge is RootBridge: 8000748ef861d082
> (PortDown)
> Apr  5 14:20:49:I:STP: VLAN VLAN: 5  Port 1/20 [Trunk 1] - Bridge TC Event
> (PortDown)
> Apr  5 14:20:49:W:LACP: ethernet 1/20 state changes from LACP-BLOCKED to
> DOWN
> Apr  5 14:20:49:I:LACP: Port 1/20 mux state transition: aggregate -> not
> aggregate (reason: peer is out of sync)
> Apr  5 14:20:49:W:LACP: ethernet 1/20 state changes from FORWARD to
> LACP-BLOCKED
> Apr  5 14:20:49:I:System: Interface ethernet 1/20, state down - disabled

It looks like your ports are switching rather than LACP and spanning tree is picking up a loop?