Port-channel not running

[Vulpic]

Hello, guys. I had trouble setting up the port-channel of two Cisco 2960-S switches. The following is the configuration of two switches. Everything seems to be right, the port-channel just doesn't work out, though. Please tell me which part I have done wrong, many thanks.

Switch#show running-config interface Gi1/0/1

interface Gi1/0/1

switchport mode trunk

switchport trunk allow vlan 100, 200

channel-group 1 mode passive

!

Switch#show running-config interface Gi1/0/2

interface Gi1/0/2

switchport mode trunkswitch

port trunk allow vlan 100, 200

channel-group 1 mode passive

!

Switch#show running-config interface Po1

interface Portchannel1

switchport mode trunk

switchport trunk allow vlan 100, 200

!

[Leo Laohoo]

Without the EtherChannel enabled, does each of the ports actually work?

[Deepak Kumar · Accepted solution]

Hi,

Can you confirm that both end ports are configured in "PASSIVE" mode?

Switch#show running-config interface Gi1/0/1
interface Gi1/0/1
switchport mode trunk
switchport trunk allow vlan 100, 200
channel-group 1 mode passive
!
Switch#show running-config interface Gi1/0/2
interface Gi1/0/2
switchport mode trunkswitch
port trunk allow vlan 100, 200
channel-group 1 mode passive

!

If both switches are configured with Passive then it will not work. A port in passive mode cannot form a port channel with another port that is also in passive mode, because neither port will initiate negotiation.

So change it from "Passive" to "Active" on any switch.

Switch#show running-config interface Gi1/0/1
interface Gi1/0/1
switchport mode trunk
switchport trunk allow vlan 100, 200
channel-group 1 mode ACTIVE
!
Switch#show running-config interface Gi1/0/2
interface Gi1/0/2
switchport mode trunkswitch
port trunk allow vlan 100, 200
channel-group 1 mode ACTIVE

!