Port Channel & Channel Group

[pablo.arcelcr]

I setup the following 

interface Port-channel1
switchport trunk encapsulation dot1q
switchport mode trunk

interface FastEthernet1/0/1
description TPCRRHR-CORE-LAN-SEC
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
!
interface FastEthernet1/0/2
description TPCRRHR-CORE-LAN-SEC
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on

I two switches 3750, I connected both switches and FastEthernet1/0/1 is up and runnning but the FastEthernet1/0/2 is not showing any light, when I do a sh interfaces status this is what I get:

Fa1/0/1 TPCRRHR-CORE-LAN-S connected trunk a-full a-100 10/100BaseTX
Fa1/0/2 TPCRRHR-CORE-LAN-S notconnect 1 auto auto 10/100BaseTX

Any thoughts?

[InayathUlla Sharieff · Accepted solution]

Pablo,

What is connected at the other end of this 3750 ? 

Fa1/0/2 TPCRRHR-CORE-LAN-S notconnect 1 auto auto 10/100BaseTX  >> it looks to me that the link is down or the other side/end is admin shutdown as this side it is showing as "notconnect" status.

First thing first:-

1- Could you default the interface to the basic config and check if the interfaces are coming up.

Ex; -conf t

        default interface range f1/0/1-2

       then do:-

show int f 1/0/1

show int f1/0/2  >> check the status it should be in up/up status.

2- Once you confirm that the layer 1 is up then shut the port down at both the end.

3- configure port-channel configuration at both the end.

4- Apply the PO config on the physical port and unshut the ports.

Hope this helps.

Regards

Inayath

[Julio E. Moisa · Accepted solution]

Hi

Basically when configuring etherchannel everything must be the same, speed, duplex, kind of port, etc. 

Now try to reset the interface to default  and please try again.

default interface fa1/0/1
default interface fa1/0/2

no interface po1

int range fa1/0/1-2
shut
channel-group 1 mode on
switchport mode trunk
no shutdown

* I recommend to use LaCP or PAgP instead default port-channel.

Hope it is useful.

:-)