Hello   we have a 2 switch stack (MS425-32)   Stacked with Port 33 SW1 going to Port 34 on SW2 and Port 34 SW1 going to Port 33 SW2   Stack is good and healthy.   We have a aggregate on port 1 on both switches that face a firewall   Port status Enabled Type Trunk Native VLAN 666 Allowed VLANs 123 Access policy Open Link negotiation Auto negotiate (10 Gbps) RSTP Enabled (Forwarding) Port schedule Unscheduled Port isolation Disabled Trusted DAI Disabled UDLD Alert only Tags none PoE n/a Port mirroring Not mirroring traffic Stacking port Disabled   and    We have a aggregate on port 2 on both switches that face my machine   Port status Enabled Type Trunk Native VLAN 666 Allowed VLANs 123 Access policy Open Link negotiation Auto negotiate (10 Gbps) RSTP Enabled (Forwarding) Port schedule Unscheduled Port isolation Disabled Trusted DAI Disabled UDLD Alert only Tags none PoE n/a Port mirroring Not mirroring traffic Stacking port Disabled     if we do a switch reboot (eg reboot switch 1 or 2) , we are seeing a 30 second outage before the firewall interface on VLAN123 is available again , what we are expecting is almost a instant / 1-2 second outage   We made a change on the firewall side ,  changing it from Passive SLOW LACP to Passive FAST LACP   and it made a big improvement - approx 10 Second outage before the firewall interface is available again on switch reboot.   What we are trying to get to is normal ~1 second outage on a switch reboot - where the links fail to the other switch   please can you check if our Agg towards the firewall is configured as best practise ,    i suspect we may need to disable RSTP ,  and maybe some other aggregate settings - any help or assistance appreciated.as this is our first Meraki Switch Stack and we are struggling to find best practises on LACP Aggregates towards devices such as a firewall   thanks!       ... View more