Configure portchannel on Cisco 9500

Portchannel is Cisco’s implementation of the EtherChannel technology, (usually) based on the 802.3ad standard).

Step-by-step guide #

Portchannel configuration #

To configure portchannel on Cisco 9500, first create a portchannel interface:

!
interface Port-channel1
 description *** Port-Channel to XYZ***
 switchport
 switchport mode trunk
 switchport nonegotiate
 logging event bundle-status
!

After that configure an interface and match the channel-group with the portchannel ID.

!
interface TwentyFiveGigE1/0/5
 description *** Port-Channel to XYZ***
 switchport
 switchport mode trunk
 switchport nonegotiate
 logging event link-status
 logging event trunk-status
 logging event bundle-status
 udld port aggressive
 channel-protocol lacp
 channel-group 1 mode active
 service-policy input AutoQos-4.0-Trust-Cos-Input-Policy
 service-policy output AutoQos-4.0-Output-Policy
!

Please note that all the ports on the C9500 series are configured as routed ports by default, so we need to manually configure them as switchport if we want to use them as L2 interfaces.

Some of the parameters used in this example are optional (such as description, service-policy and logging event parameters), while others are mandatory.
At minimum, you should configure switchport parameter, what channel-protocol you will be using and what channel-group the port belongs to.

Read more #

• Cisco EtherChannel White Paper
• PortChannel between Cisco IOS switch and a router
• Cisco IOS configuration examples
• Wikipedia – EtherChannel