Cross stack etherchannel with LACP issue

[grapevine]

I have 2 cisco stacks with 2 switches of IE-9320-26S2C each with firmware 17.12.04. We have etherchannel configured between the two switches with the physical interfaces from each members on the stack.

When we power off one of the switches in the stack, we lose connectivity to the stack, how to fix it.

Configuration of switch 1 interfaces:

01# sh run int Po5
Building configuration...

Current configuration : 135 bytes
!
interface Port-channel5
description Uplink_to_Cluster2
switchport trunk allowed vlan 6,128,130,132,136
switchport mode trunk
end

01#sh run int Gi1/0/28
Building configuration...

Current configuration : 197 bytes
!
interface GigabitEthernet1/0/28
description RSW01 28 / CLUSTER 2 SW5P28
switchport trunk allowed vlan 6,128,130,132,136
switchport mode trunk
channel-group 5 mode active
lacp rate fast
end

01#sh run int Gi2/0/28
Building configuration...

Current configuration : 197 bytes
!
interface GigabitEthernet2/0/28
description RSW02 28 / CLUSTER 2 SW6P28
switchport trunk allowed vlan 6,128,130,132,136
switchport mode trunk
channel-group 5 mode active
lacp rate fast
end

Switch 2 config

2# sh run int Po5
Building configuration...

Current configuration : 135 bytes
!
interface Port-channel5
description Uplink_to_Cluster1
switchport trunk allowed vlan 6,128,130,132,136
switchport mode trunk
end

2#sh run int Gi1/0/28
Building configuration...

Current configuration : 197 bytes
!
interface GigabitEthernet1/0/28
description RSW05 28 / CLUSTER 1 SW1P28
switchport trunk allowed vlan 6,128,130,132,136
switchport mode trunk
channel-group 5 mode active
lacp rate fast
end

2#sh run int Gi2/0/28
Building configuration...

Current configuration : 197 bytes
!
interface GigabitEthernet2/0/28
description RSW06 28 / CLUSTER 1 SW2P28
switchport trunk allowed vlan 6,128,130,132,136
switchport mode trunk
channel-group 5 mode active
lacp rate fast
end

[Kasun Bandara]

@grapevine hi, do you have any logs when you disconnecting the cable? also is that disconnection happening only for few seconds or till connectivity restore totally?

[grapevine]

when we power off the active member, the port in the member switch goes to suspended state and we lose connectivity

we applied stack-mac persistent timer 0 and still see the same issue

[grapevine · Accepted solution]

We fixed the issue by removing the command 'lacp rate fast'. Thanks for your assistance