Can you also add the vlan and port sharing configuration from both switches?
Specifically I am interested in:- Ports used for the ISC (VLAN 2000), and how they are configured (as sharing group, with LACP?)- Are all VLANs + the ISC VLAN added as tagged to the ISC port(s)?- Is the ISC port NOT configured as MLAG port?- Can you confirm that the ISC VLAN is ONLY on the ISC ports?
- Sharing and LACP configuration for MLAG ports 11, 12, 22, 23, 31, 47, 48 - and, as Frank already asked, are the switches on the other side configured the same way? (link aggregation yes/no, LACP yes/no, which algorithm....)
Also, a simple diagram showing all ISC, MLAG and upstream router connections as well as port numbers would help...