topic Etherchannel issue in Switching

Etherchannel issue

Thameem1981 — Tue, 07 Jan 2025 13:27:32 GMT

Hello all,

I am trying to form EtherChannel just for testing in Packet tracer and not getting the desired results. When I try to form LACP active on both ends one of the Port goes to I-Standalone mode, not sure what mistake I am doing. Someone can have a look at the config and explain the issue here.

Problem between CSW2>DSW1>Port22 and PO2

CSW1:

interface GigabitEthernet1/0/22

switchport mode trunk

channel-group 2 mode active

interface GigabitEthernet1/0/23

switchport mode trunk

channel-group 1 mode active

interface GigabitEthernet1/0/24

switchport mode trunk

channel-group 1 mode active

CSW2:

interface GigabitEthernet1/0/22

switchport mode trunk

channel-group 2 mode active

interface GigabitEthernet1/0/23

switchport mode trunk

channel-group 1 mode active

interface GigabitEthernet1/0/24

switchport mode trunk

channel-group 1 mode active

DSW1:

interface GigabitEthernet1/0/23

switchport mode trunk

channel-group 2 mode active

interface GigabitEthernet1/0/24

switchport mode trunk

channel-group 2 mode active

Etherchannel summary:

CSW1:

Group Port-channel Protocol Ports

------+-------------+-----------+----------------------------------------------

1 Po1(SU) LACP Gig1/0/23(P) Gig1/0/24(P)

2 Po2(SU) LACP Gig1/0/22(P)

CSW1#

CSW2:

Group Port-channel Protocol Ports

------+-------------+-----------+----------------------------------------------

1 Po1(SU) LACP Gig1/0/23(P) Gig1/0/24(P)

2 Po2(SD) LACP Gig1/0/22(I)

CSW2#

DSW:

Group Port-channel Protocol Ports

------+-------------+-----------+----------------------------------------------

2 Po2(SU) LACP Gig1/0/23(P) Gig1/0/24(I)

DSW1#

Re: Etherchannel issue

David Ruess — Tue, 07 Jan 2025 13:36:25 GMT

Hello,

It could be stuck as it doesn't seem to recognize LACP messages on the port. I would verify your configs and run a shut/no shut on the ports or even restart the devices.

Make sure you verify connections as well. i.e. the correct ports are plugged in/configured.

-David

Re: Etherchannel issue

M02@rt37 — Tue, 07 Jan 2025 13:56:33 GMT

Hello @Thameem1981

The main issue lies in the mismatch of channel-group assignments and potentially misaligned configurations between CSW2 and DSW1. Align the channel-group configurations on both ends and ensure all interfaces in the EtherChannel have identical settings.

First create Po interfaces on each side, and add interfaces on that Port-Channel.

Once corrected, the EtherChannel should form correctly without any ports in I-Standalone mode.

Re: Etherchannel issue

Flavio Miranda — Tue, 07 Jan 2025 13:54:51 GMT

@Thameem1981

Dont add the config to the interface. Just add the interface to the port-channel and then add the config to the port-channel

Int po X

switchport mode trunk

Re: Etherchannel issue

MHM Cisco World — Tue, 07 Jan 2025 14:02:14 GMT

Dont worry' save lab close it and open again and issue will solved.

MHM

Re: Etherchannel issue

Martin L — Fri, 10 Jan 2025 02:15:06 GMT

PT is just a simulator; not real thing; some things may not work or work as real IOS does;

you can attach PT file here but it must be in zip format

Regards, ML
**Please Rate All Helpful Responses **

Re: Etherchannel issue

Thameem1981 — Sat, 11 Jan 2025 08:01:15 GMT

Dear's

Thank you for all of your responses, I tried all the possible ways to make it work but still is not working, attached the packet tracer file for your reference. I dont know understand I just did what said that I configure PO's first then for the interfaces but still they are not forming. Any help would be appreciated.

Thank you all..