Thanks for your advice.
Here is the output:
Catalyst 9500:
Group: 2
----------
Group state = L2
Ports: 2 Maxports = 16
Port-channels: 1 Max Port-channels = 16
Protocol: LACP
Minimum Links: 0
Ports in the group:
-------------------
Port: Te2/0/1
------------
Port state = Up Mstr Assoc Not-in-Bndl
Channel group = 2 Mode = Active Gcchange = -
Port-channel = Po2 GC = - Pseudo port-channel = Po2
Port index = 0 Load = 0x00 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port Port
Port Flags State Priority Key Key Number State
Te2/0/1 SA bndl 32768 0x2 0x2 0x202 0xD
Partner's information:
LACP port Admin Oper Port Port
Port Flags Priority Dev ID Age key Key Number State
Te2/0/1 SA 255 001c.7f6d.c95e 0s 0x0 0xF 0x2 0x5
Age of the port in the current state: 0d:00h:31m:43s
Port: Te2/0/2
------------
Port state = Up Mstr Assoc Not-in-Bndl
Channel group = 2 Mode = Active Gcchange = -
Port-channel = Po2 GC = - Pseudo port-channel = Po2
Port index = 0 Load = 0x00 Protocol = LACP
Flags: S - Device is sending Slow LACPDUs F - Device is sending fast LACPDUs.
A - Device is in active mode. P - Device is in passive mode.
Local information:
LACP port Admin Oper Port Port
Port Flags State Priority Key Key Number State
Te2/0/2 SA bndl 32768 0x2 0x2 0x203 0xD
Partner's information:
LACP port Admin Oper Port Port
Port Flags Priority Dev ID Age key Key Number State
Te2/0/2 SA 255 001c.7f6d.c95e 0s 0x0 0xF 0x1 0x5
Age of the port in the current state: 0d:00h:31m:43s
Port-channels in the group:
---------------------------
Port-channel: Po2 (Primary Aggregator)
------------
Age of the Port-channel = 0d:01h:27m:35s
Logical slot/port = 11/2 Number of ports = 2
HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = LACP
Port security = Disabled
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 00 Te2/0/1 Active 0
0 00 Te2/0/2 Active 0
Time since last port bundled: 0d:00h:31m:43s Te2/0/1
Time since last port Un-bundled: 0d:00h:34m:18s Te2/0/2
---------------------------------------------------------------------------------------------------------
Checkpoint:
Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2 (0)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 200
Down Delay (ms): 200
802.3ad info
LACP rate: slow
Min links: 0
Aggregator selection policy (ad_select): stable
System priority: 65535
System MAC address: 00:1c:7f:6d:c9:5e
Active Aggregator Info:
Aggregator ID: 5
Number of ports: 2
Actor Key: 15
Partner Key: 2
Partner Mac Address: e4:1f:7b:a9:15:80
Slave Interface: eth1-03
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 3927
Permanent HW addr: 00:1c:7f:6d:c9:5e
Slave queue ID: 0
Aggregator ID: 5
Actor Churn State: none
Partner Churn State: churned
Actor Churned Count: 0
Partner Churned Count: 8
details actor lacp pdu:
system priority: 65535
system mac address: 00:1c:7f:6d:c9:5e
port key: 15
port priority: 255
port number: 1
port state: 13
details partner lacp pdu:
system priority: 32768
system mac address: e4:1f:7b:a9:15:80
oper key: 2
port priority: 32768
port number: 514
port state: 5
Slave Interface: eth1-04
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 9
Permanent HW addr: 00:1c:7f:6d:c9:5f
Slave queue ID: 0
Aggregator ID: 5
Actor Churn State: none
Partner Churn State: churned
Actor Churned Count: 2
Partner Churned Count: 8
details actor lacp pdu:
system priority: 65535
system mac address: 00:1c:7f:6d:c9:5e
port key: 15
port priority: 255
port number: 2
port state: 13
details partner lacp pdu:
system priority: 32768
system mac address: e4:1f:7b:a9:15:80
oper key: 2
port priority: 32768
port number: 515
port state: 5
---------------------------------------------------------------------------------------------------------
We captured the traffic and saw a lot of LACP packets between 2 devices but it seems that the negotiation never happened and the port-channel remained down/down (physical ports were up / down (not connect))
If we issued "no channel-group 2 mode active" on physical ports, the ports and Po went up.
If we used the "on" mode, the Po went up as well.
I really do not understand what's happening. This should be something really basic..
