Port channel help

[The_guroo_2]

Guys i have to config layer 2 and layer 3 port channels so just wondering have a done it the right way

layer 2

interface Port-channel 20

Description Port channel to Core

switchport

switchport trunk encapsulation dot1q

switchport mode trunk

switchport trunk native vlan 19 (as 19 will be the managment one)

!

interface range gig1/0/1 -2

switchport trunk encapsulation dot1q

switchport mode trunk

channel-group 20 mode on

end

Do we have to write encapsulation on both port channel interface as well as actual interface???

Layer 3

interface Port-channel 15

ip address  ip address 10.X.X.X 255.255.255.248

Description Port channel to data-core

duplex full

speed 1000

Interface range Gi 2/0/1-4

Description Port channel to AUBH02TRUSSA01

no switchport

no ip address

channel-group 15 mode on

do we have to write duplex and speed (as i rem i have seen this sort of config some where) I know i am not using any channel protocol like LACP etc

Thanks

[Shashank Singh]

Hi,

No additional configuration is required under the port channel interface. Having the encapsulation command just on the physical interface is good enough.

Since you are using channel-group mode on, no protocol is being used for bundling. Its just a way to hard code ether channel without any negotiation between the ends.

Speed and duplex under the physical interface are optional commands and should only be configured under the physical interfaces. Please ensue that all the interfaces being bundled have exactly the same configuration.

Hope this helps,

Shashank

Please rate if this answered your question.

[Latchum Naidu]

Hi,

As per the best practicies, better enable encapusulation on both portchannel interface and actual interface.

Regarding spped and duplex should configured under the physical interfaces only and make sure both end same interface settings.

You may look at the below ones...

interface Port-channel1
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 5
switchport mode trunk

interface GigabitEthernet3/33
description A13 is Connected to Empire store
switchport trunk encapsulation dot1q
switchport trunk native vlan 5
switchport mode trunk
channel-group 1 mode on

Regards,

Naidu.