Tasio,

Edit: Ahh... My fault It's a cisco gear.

Please provide us with the information regarding who is connecting to who. Which devices are going to build Etherchannel.

Let's check the configuration on both sides. It's a good idea to post it here.

HTH,

Toshi

ohhh you answer very fast . great!!

i try to explaint me.

one side:

a switch 3560 with 2 br1410 connected int fas 0/20 and 0/21 in etherchanner

the same in the other side.

*******************************

interface FastEthernet0/20

switchport trunk encapsulation dot1q

switchport trunk native vlan 997

switchport mode trunk

channel-group 2 mode desirable

!

interface FastEthernet0/21

switchport trunk encapsulation dot1q

switchport trunk native vlan 997

switchport mode trunk

channel-group 2 mode desirable

!

interface Port-channel2

switchport trunk encapsulation dot1q

switchport trunk native vlan 997

switchport mode trunk

!

****************************

in one side the br1410 one root and other no-root

the same in the other side.

Thanks.