I have this issue sometimes when the MS225 are in a stack and connected with an aggregat to CIsco classic switches. I put an auto shut on error command on the cisco classic switches and after two minutes (120 sec) it´s doing a recovery then everything works well. Port-config: interface TenGigabitEthernet2/0/18 description to_ switch_18 switchport trunk allowed vlan 1,8,12,16,20,24,26,28,30,50,52,86,90,300,301 switchport mode trunk udld port aggressive channel-group 11 mode active spanning-tree guard loop global config for port-recovering: port-channel load-balance src-dst-ip errdisable recovery cause udld errdisable recovery cause bpduguard errdisable recovery cause security-violation errdisable recovery cause channel-misconfig errdisable recovery cause pagp-flap errdisable recovery cause dtp-flap errdisable recovery cause link-flap errdisable recovery cause sfp-config-mismatch errdisable recovery cause gbic-invalid errdisable recovery cause l2ptguard errdisable recovery cause psecure-violation errdisable recovery cause port-mode-failure errdisable recovery cause dhcp-rate-limit errdisable recovery cause pppoe-ia-rate-limit errdisable recovery cause mac-limit errdisable recovery cause vmps errdisable recovery cause storm-control errdisable recovery cause inline-power errdisable recovery cause arp-inspection errdisable recovery cause link-monitor-failure errdisable recovery cause oam-remote-failure errdisable recovery cause loopback errdisable recovery cause psp errdisable recovery interval 120 license boot level ipbasek9 diagnostic bootup level minimal
... View more