We need to connect 2 switches together and have 2 options for them:-
1. Use access port on both sides
2. Use trunk port on both sides
All interfaces in the new switch are in same VLAN and there is no requirement to configure multiple VLAN's on it.
Sw1 (Gi1/48) <--> Sw2 (Gi1/48) (new) (Merki switch with RSTP enabled)
As we know, if we are connecting Sw1 and the interface on Sw1 is access then we need to disable BPDU guard on the interface of Sw1 (on which we are connecting uplink of Sw2). I also have spanning tree port-fast enabled on in the interface on Sw1 and assume I have to remove that as well. Otherwise normal STP steps will be bypassed.
My question here is, is there any probability of loop in the network if we use this configuration or should we use trunk instead?
Sw1 port Gi1/48 configuration is as below:-
switchport access vlan yyy
switchport mode access
switchport voice vlan xxx
qos trust cos
qos trust device cisco-phone
shape percent 30
service-policy input QoS-TEMPLATE
service-policy output DBL
Sw2 port Gi1/48 configuration is as below:-
RSTP = Enabled
STP Guard = disable
Type = access
Vlan = yyy
Along with other suggestions, You should read this - https://documentation.meraki.com/MS/Deployment_Guides/Advanced_MS_Setup_Guide
Meraki switches only support STP/RSTP. With Cisco switch running PVST, Meraki will run STP. Don’t let Meraki become root.