Channel configuration on 3560

eemoon
eemoon used Ask the Experts™
on
We have a switch 3560 where two physical ports are configured and two ports are put into channel as the below.  On the channel, do we need to add the same configuration on the channel as the physical port? Thank you

interface GigabitEthernet0/20
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 10
 switchport mode trunk
 switchport nonegotiate
 channel-group 10 mode on
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SouljaSr.Net.Eng
Top Expert 2011

Commented:
Usually you just added the channel-group command under the physical ports. Then go to the port-channel and add the rest of the config. Those configs will then populate under the physical ports. If the associated Port-channel isn't showing the same configs under it as the configs above, you will need to enter them.

Author

Commented:
Thank you so much for your fast reply. if there is different configuration between the physical port and its channel port, does it has function based on the channel port configuration or physical ?
SouljaSr.Net.Eng
Top Expert 2011

Commented:
The port channel. Can you post the port channel config? Usually a big discrepancy in configuration would prevent the members from joining the channel.
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Author

Commented:
i set up channel config on port g0/13 - 14, and these config do not go into channel port automatically. so we need to add the same config into channel port. if there is one of the blow commands missing in channel port, for example we are missing "switchport nonegotiate", what is final result?

interface GigabitEthernet0/13
 switchport trunk encapsulation dot1q
 switchport mode trunk
 switchport nonegotiate
 channel-group 4 mode on
Sr.Net.Eng
Top Expert 2011
Commented:
@eemoon

That shouldn't effect the port channel. In the future, just put the channel-group command under the physical, then go to the port-channel it creates and put the rest of the configuration. When you enter the channel-group command it automatically creates the port-channel. So you can then put the configs under the port-channel. The configs entered under the port channel flows to the physical members.

Post the output of
sh ether-channel summary

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Distinguished Expert 2018

Commented:
Please do not use mode on if you don't have to - having LACP or PAgP configured can safe you from network  loops.

channel-group 4 mode active

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