Create Port channel in 3750

[Engineer-US]

Hi,

I have Cisco switch 3750x running version 15.0(2)SE4 and I want to create port channel to 2 ports using this configuration below, when I moved some of these commands to the port channel didn't work.

switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,24
switchport mode trunk
switchport nonegotiate
no logging event link-status
load-interval 30
carrier-delay msec 0
srr-queue bandwidth share 1 30 35 5
priority-queue out
no snmp trap link-status
mls qos trust dscp
storm-control broadcast level 30.00
storm-control multicast level 15.00
storm-control action trap
service-policy input AUTOQOS-SRND4-SOFTPHONE-POLICY
end

any suggestions please?

[Reza Sharifi]

Hi,

First, copy the config under the interfaces to a notepad and save it. after that, default the physical interfaces you want to add to the Portchannel. Now, under each physical interface, add each interface to the Portchannel. This will also create the po for you. Once you are done with this, go the po interface and do a "no shut" to bring up the po. Once both the physical interfaces and the po interface are in up and up mode and everything is working, add the config you saved on the notepad to the po only.

default interface GigabitEthernet x/x/x

HTH 

[Engineer-US]

Hi Reza,

Thank you for your replay, I follow your steps, the interfaces up but the po still not connect.

FYI.. This is L2 po

interface GigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,24
switchport mode trunk
switchport nonegotiate
storm-control broadcast level 30.00
storm-control multicast level 15.00
storm-control action trap
channel-group 12 mode active
end

stack(config)#int po12
stack(config-if)#
stack(config-if)#int Port-channel12
stack(config-if)#
stack(config-if)#switchport
stack(config-if)#switchport trunk encapsulation dot1q
stack(config-if)#switchport mode trunk
stack(config-if)#switchport nonegotiate
stack(config-if)#switchport trunk allowed vlan 10,24
stack(config-if)#switchport mode trunk
stack(config-if)#switchport nonegotiate
stack(config-if)#no logging event link-status
stack(config-if)#load-interval 30
stack(config-if)#carrier-delay msec 0
stack(config-if)#srr-queue bandwidth share 1 30 35 5
^
% Invalid input detected at '^' marker.

stack(config-if)#priority-queue out
^
% Invalid input detected at '^' marker.

stack(config-if)#no snmp trap link-status
stack(config-if)#mls qos trust dscp
^
% Invalid input detected at '^' marker.

stack(config-if)#storm-control broadcast level 30.00
stack(config-if)#storm-control multicast level 15.00
stack(config-if)#storm-control action trap
stack(config-if)#service-policy input AUTOQOS-SRND4-SOFTPHONE-POLICY
QoS: policymap is supported on physical, VLAN, and ES interfaces only
Service Policy attachment failed
stack(config-if)#

interface Port-channel12
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,24
switchport mode trunk
switchport nonegotiate
no logging event link-status
load-interval 30
carrier-delay msec 0
no snmp trap link-status
storm-control broadcast level 30.00
storm-control multicast level 15.00
storm-control action trap
end

[Reza Sharifi]

Hi,

When you say "po still not connect" you mean the po is not up and up mode?

What is the output of sh ip int bri poxx?

What is the output of "sh ether-cha sum"

HTH

[Joseph W. Doherty]

Some 3750 port-channel configuration commands must still be applied at the member port interfaces, not the port-channel interface. In this case, the commands being rejected, the SRR commands, are tied to physical interfaces. Apply those commands to the physical port interfaces.

[Engineer-US · Accepted solution]

Thanks all, I'm able to resolve the issue by using this setting:

interface Port-channel1

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 10,24

switchport mode trunk

!

interface GigabitEthernet1/0/1

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 10,24

switchport mode trunk

channel-group 1 mode on

no sh

!