Hello everyone,

I have a problem with PoE / spanning tree. When I use spanning tree in flat mode, my PoE devices do not start anymore, if there was a loop and the spanning tree protocol was triggered. Currently I am forced to temporarily turn off spanning tree, which is of course not ideal.

Below here is my example script:

“””
! Chassis:
system name “Switch_1”
system contact “Everyname”
system location “Not_Here”

password
switch
123456789
123456789

! Configuration:
configuration error-file-limit 2

! Capability Manager:
! Virtual Flow Control:
! Interface:
! Port_Manager:
! VLAN:

! VLAN Main:
vlan 20 admin-state enable
vlan 20 name “Main”
vlan 20 members port 1/1/1-2 untagged
vlan 20 members port 1/1/3-28 tagged

! VLAN Second:
vlan 30 admin-state enable
vlan 30 name “Second”
vlan 30 members port 1/1/1-2 tagged
vlan 30 members port 1/1/3-24 untagged
vlan 30 members port 1/1/25-28 tagged

! OTHER VLAN:
vlan 1 name “managment”
vlan 140 name “tele”
vlan 150 name “sys”

! Spanning Tree:
spantree mode flat
spantree protocol mstp

! DA-UNP:
! Bridging:
! Port Mirroring:
! IP:
no ip interface “management”
ip interface “Main” ifindex 3
ip interface “Second” address 20.20.1.211 mask 255.255.255.0 vlan 30 ifindex 4

! IPMS:
! AAA:
aaa authentication console “local”

! NTP:
ntp server pool.ntp.org
ntp client admin-state enable

! QOS:
! Policy Manager:
! LLDP:
! Session Manager:

! Web:
! Trap Manager:
! Health Monitor:
! System Service:
ip name-server 9.9.9.9
ip domain-lookup
system timezone CET

! SNMP:
! IP Route Manager:
! LAN Power:

lanpower slot 1/1 service start
lanpower slot 1/1 fpoe enable

! DHCP Snooping:
! OVC:
! IP DHCP RELAY:
! MGMT AGENT:

write memory
copy running certified
write memory flash-synchro “””

Look forward to hearing from you people,
Yannick