Dear CommunityAfter added vlan 634 to CoreSwitch1 (CatOS6509), the ethernet channel ports on CoreSwitch1 were disabled due to errors (pls see the log below).CoreSwitch1>2007 Aug 08 10:29:31 AEST +10:00 %SPANTREE-2-CHNMISCFG: STP loop - channel 5/1-2 ...