Port-Channel

[gscala]

Hello,

I'm using Cisco Packet Tracer 7.1 and trying to configure a port-channel. I am using two standard switches with two 1GB fiber interfaces on each switch. Here is my configuration:

version 12.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption

hostname

spanning-tree mode pvst

interface Port-channel 5
switchport mode trunk

interface FastEthernet0/1

interface FastEthernet1/1

interface FastEthernet2/1

interface FastEthernet3/1

interface GigabitEthernet4/1
switchport access vlan 5
switchport mode trunk
channel-protocol lacp
channel-group 5 mode active

interface GigabitEthernet5/1
switchport access vlan 5
switchport mode trunk
channel-protocol lacp
channel-group 5 mode active

interface Vlan1
no ip address
shutdown

line con 0

line vty 0 4
login
line vty 5 15
login

The problems I am having is that I have to manually do a no shut on the port-channel interface for it to show up, otherwise, it shows down. Once it is up it's fine, but if I power cycle the switches, again, it shows down and I have to manually turn it up. Any ideas why it's not coming up automatically?

Thank you!

-Jerry

[Julio E. Moisa · Accepted solution]

Hi

You should remove these lines 

interface GigabitEthernet4/1
switchport access vlan 5
switchport mode trunk
channel-protocol lacp
channel-group 5 mode active

interface GigabitEthernet5/1
switchport access vlan 5
switchport mode trunk
channel-protocol lacp
channel-group 5 mode active

A switchport cannot be access mode and trunk mode at the same time. Your port channel config is ok, try removing that. 

:-)

[gscala]

Hi Julio,

Okay, I will try that Julio and let you know.

Thank you.

-Jerry

[Julio E. Moisa]

Great, thank you Jerry.

Not sure if on packet tracer can be executed this command to verify the status:

show etherchannel summary

:-)

[gscala]

I removed those lines, but no change. I did execute that command and it shows down;

po5 (SU)

[gscala]

I apologize! Typo, it should have read po5 (SD).  However, once I rebooted the switches it came up automatically so that was it Julio!!! Thank you very much!

-Jerry

[Julio E. Moisa]

You are welcome 

Have a great day  

:-)

[Julio E. Moisa]

The Etherchannel should be up and running, because the following: 

S = Layer 2
U = In Use

Flags:

Flags:

D - down

P - bundled in port-channel
I - stand-alone s - suspended
H - Hot-standby (LACP only)
R - Layer3 S - Layer2
U - in use

N - not in use, no aggregation
f - failed to allocate aggregator

M - not in use, minimum links not met
m - not in use, port not aggregated due to minimum links not met
u - unsuitable for bundling
w - waiting to be aggregated
d - default port

A - formed by Auto LAG

It should be working without any problem, you could remove the channel-protocol LACP because you already saying that you are using LACP when active (or passive) mode is configured.

:-)

[gscala]

Hi Julio,

Okay. I will do that too. Thank you again my friend for your help!

-Jerry

[Julio E. Moisa]

You are welcome Jerry, if any doubt arise we are here to assist you.  

Have a happy weekend. 

:-)

[gscala]

Everything is working perfectly.

You too Julio :-)