Hi all I am trying to connect a Catalyst 5505 and a BayStack350 using a 802.1q trunk. My setting are the following. It doesn't work . The only configuration which works is when I put Disable on STP Learning (see below) in BayStack config. I really need STP for both of them. I cannot disable it ! Catalyst trunking ports : 2/18, 2/19 Where is the mistake ? Thanks in advance Cristian Piatnitchi ************************************Cat5505********************************* ************************** set vlan 1 name default type ethernet mtu 1500 said 100001 state active #spantree #uplinkfast groups set spantree uplinkfast disable #backbonefast set spantree backbonefast disable #vlan 1 set spantree enable 1 set spantree fwddelay 15 1 set spantree hello 2 1 set spantree maxage 20 1 set spantree priority 4000 1 clear trunk 2/18 2-1005 set trunk 2/18 nonegotiate dot1q 1 clear trunk 2/19 2-1005 set trunk 2/19 nonegotiate dot1q 1 set spantree portfast 2/17-24 disable Port Mode Encapsulation Status Native vlan -------- ----------- ------------- ------------ ----------- 2/18 nonegotiate dot1q trunking 1 2/19 nonegotiate dot1q trunking 1 ****************************************BAyStack Configuration***************************************** MultiLink Trunk Configuration Trunk Trunk Members STP Learning Trunk Mode Trunk Status ----- ------------------------------- ------------ --------------- ------------ 1 [ /23 ][ /24 ][ / ][ / ] [ Eanbled ] Basic [ Enabled ] 2 [ / ][ / ][ / ][ / ] [ Normal ] Basic [ Disabled ] 3 [ / ][ / ][ / ][ / ] [ Normal ] Basic [ Disabled ] 4 [ / ][ / ][ / ][ / ] [ Normal ] Basic [ Disabled ] 5 [ / ][ / ][ / ][ / ] [ Normal ] Basic [ Disabled ] 6 [ / ][ / ][ / ][ / ] [ Normal ] Basic [ Disabled ] VLAN Configuration Create VLAN: [ 1 ] Delete VLAN: [ ] VLAN Name: [ VLAN #1 ] Port Membership 1-6 7-12 13-18 19-24 ------ ------ ------ ------ Unit #1 UUUUUU UUUUUU UUUUUU UUUUTT VLAN Port Configuration Port: [ 23 ] Filter Tagged Frames: [ No ] Filter Untagged Frames: [ No ] Filter Unregistered Frames: [ No ] Port Name: [ Port 1 ] PVID: [ 1 ] Port Priority: [ 0 ] Port: [ 24 ] Filter Tagged Frames: [ No ] Filter Untagged Frames: [ No ] Filter Unregistered Frames: [ No ] Port Name: [ Port 1 ] PVID: [ 1 ] Port Priority: [ 0 ] Cristian Piatnitchi _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]