Good day, guys!
I have a simple topology with two devices (Cisco CBS350-48T-4G Version: 3.2.0.84 and Meraki MS 120 Version: MS 15.4) and two optical links between them.
These two interfaces are in one LAG with LACP mode.
Configuration of CBS350:
#sh run int po2
interface Port-Channel2
no negotiation
description ===MS120-Po2===
switchport mode trunk
switchport trunk native vlan 300
switchport trunk allowed vlan 300
!
#sh run int gi49
interface GigabitEthernet49
description ===MS120-25port===
channel-group 2 mode auto
switchport mode trunk
switchport trunk native vlan 300
switchport trunk allowed vlan 300
!
#sh run int gi50
interface GigabitEthernet50
description ===MS120-26port===
channel-group 2 mode auto
switchport mode trunk
switchport trunk native vlan 300
switchport trunk allowed vlan 300
This port-channel periodically (about once a two our)flaps and goes up only with one random interface (gi49 or gi50) or with both of them:
04-Nov-2022 04:04:55 :%LINK-I-Up: Po2
04-Nov-2022 04:04:55 :%TRUNK-I-PORTADDED: Port gi50 added to Po2
04-Nov-2022 04:04:52 :%LINK-W-Down: Po2
04-Nov-2022 04:04:52 :%TRUNK-W-PORTREMOVED: Port gi50 removed from Po2
04-Nov-2022 04:04:51 :%TRUNK-W-PORTREMOVED: Port gi49 removed from Po2
Such behavior is unexpected, I need a more stable connection. I couldn`t find anything similar in the bug list.
I`ve tested the same scheme with a copper connection and everything was working as expected, without any flaps.
Maybe somebody also has the same issue? Have you any thoughts on what it can be?
