Loop-protection and MSTP
This topic shows that MSTP and loop-protection can be used to protect against loops. The following two figures show a download link failure of VSX LAG to BPDU tunneling.
With the loop-protect feature activated on Agg-1 and Agg-2 and MSTP, the loop is detected and one of the VSX LAGs is brought down, isolating access switch SW2 shown in the following figures.