cisco catalyst center

[enrico.frediani]

Hi everybody.
I have a new C9500-48Y4C with firmware version 17.12.04: this is the last recommended version by cisco. 

I have a problem with configuring port-channel on the switch. I show the commands and the outputs.

C9500.(config)#int port-channel ?
<1-126> Port-channel interface number
LPO-CED1_2-C9500-10.(config)#int port-channel 1
^
% Invalid input detected at '^' marker.

Looking for the error I found a similar problem solved by upgrading the firmware, but I have the recommended firmware installed.
Can someone help me^

[Flavio Miranda]

@enrico.frediani 

How does the switch hostname change from C9500 to LPO-CED1_2-C9500-10. ?

Seems to me it is complaining about the hostname, not the port-channel

[marce1000]

 - You need to configure the EtherChannel first on the interfaces belonging to the port channel ; have a look at
    https://netseccloud.com/configuring-cisco-port-channels-step-by-step-tutorial

 M.

[Leo Laohoo]

Use a different EtherChannel number.

[enrico.frediani]

Thank you to your answer. I detail more the switch configuration and add some other things. 
I read the useful guide suggested by marce1000 and found that I already made the right things. I show you the port configuration:

interface TwentyFiveGigE1/0/42
description ATTENTO:PORT-CHANNEL
switchport mode trunk
switchport nonegotiate
channel-protocol lacp
channel-group 1 mode active
!
For Flavio: I made a mistake while copying (sorry): the hostname is C9500. So the right output is the following:

C9500(config)#int port-channel ?
<1-126> Port-channel interface number

C9500(config)#int port-channel 1
^
% Invalid input detected at '^' marker.

For Leo: i tried another port-channel number to 2, but the command had no effect: the twe1/0/42 remains on channel-group 1.

For everybody: I tried the following command:

C9500#sh etherchannel port-channel
Channel-group listing:
----------------------

Group: 1
----------

Group: 2
----------

Group: 3
----------

I really do not understand what the last output means (why there are three empty port-channel groups?)

Now: I downgraded firmware to 17.09.05 firmware and the port-channel instruction (and behavior) is ok:

C9500(config)#do sh ver
Cisco IOS XE Software, Version 17.12.04
....

C9500(config)#do sh run | be 1/0/42
interface TwentyFiveGigE1/0/42
description ATTENTO:PORT-CHANNEL
switchport mode trunk
switchport nonegotiate
channel-protocol lacp
channel-group 1 mode active
...

C9500(config)#int por
C9500(config)#int port-channel 1
C9500(config-if)#
...

Sincerely, it is very hard for me to accept that a firmware recommended by Cisco is "so" bugged... or I am wrong?
What do you think: I remain with this firmware version or retry to ude the updated firmware?

thank you for your important advices

[Leo Laohoo]

Stay with 17.12.4.  17.9.X is worse.  

[shambhu.kumar]

Hello Enrico,

I have used same version 17.12.04 in C9500-48Y4C switch and running without any issue. Recently I have upgraded this version  in 40 switches.

Regards

Shambhu Kumar

[enrico.frediani]

I have good news and bad news.

The good news: I re-upgraded the stack and now the channel-group 1 command works correctly.

The bad news: now the vlan commands do not work. I tried to create a vlan and assign it to a trunk port:

C9500#sh run | be 2/0/1
interface TwentyFiveGigE2/0/1
switchport trunk allowed vlan 1,2
switchport mode trunk

C9500(config-if)#do sh int status

Port Name Status Vlan Duplex Speed Type
...
Twe2/0/1 connected 1 a-full a-1000 10/100/1000BaseTX SFP
...

Now I try to view the interface trunk status and the vlan status:

C9500(config-if)#do sh int trunk

C9500(config-if)#

Nothing??? No interface trunk shown?

C9500(config-if)#do sh vlan

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Twe1/0/1, Twe1/0/2, Twe1/0/3
Twe1/0/4, Twe1/0/5, Twe1/0/6
...
2 vlan2_2 active
...

Am I making a big mistake or my switches are unstable?

Finally I re-downgraded to 17.09.05 and....

C9500#sh int trunk

Port Mode Encapsulation Status Native vlan
Twe2/0/1 on 802.1q trunking 1

Port Vlans allowed on trunk
Twe2/0/1 1-2

Port Vlans allowed and active in management domain
Twe2/0/1 1-2

Port Vlans in spanning tree forwarding state and not pruned
Twe2/0/1 1-2

At this point I do not understand: are my switches damaged? Is the 17.12.04 unstable in some situation/hardware? What do you advise me to do, given that I will soon have to install the switches in a data center?

[Flavio Miranda]

I would open a TAC. This is not acceptable. Probably this will end up in a RMA.

[Leo Laohoo]

Post the complete output to the command "sh post".

[enrico.frediani]

r your information: re-upgraded again and vlans are ok.... what will be the next fonction not working? 8D

[enrico.frediani · Accepted solution]

FYI: I erased the whole configuration and reconfigured the stack (with 17.12.04) with the original configuration: all the commands have been accepted. 

thank you to everybody