Hi Team,
Any assistance would be greatly appreciated.
I am having a strange issue with port-channels that connect between a stack of 2960s and our firepower 2110s.
I have a port-channel on the switch with two physical interfaces, one from the master and one from the member. I also have a a corresponding port-channel on the firepower that they connect to.
When i reload the master switch, as expected the member takes over mastership, the port-channel goes down/down(unexpected) and the physical port for the reloaded switch goes down/down(expected) but for the new master the port goes up/down not connected(unexpected). Now once that reloaded switch comes back up as a member all the interfaces return to up/up, if i go and reload that exact same switch there is no affect on the port-channel, everything continues to be up/up. So it only appears to be an issue when reloading the master switch.
This issue is common among 4 stacks of 2960s we have connected to the firepowers.
Switch software is 15.2(7)E3
Firepower Software is 6.6.1
Config on switch interfaces:
Int G1/0/1
switchport access vlan 2222
switchport mode access
spanning-tree portfast edge
channel-protocol lacp
channel-group 1 mode active
Int G2/0/1
switchport access vlan 2222
switchport mode access
spanning-tree portfast edge
channel-protocol lacp
channel-group 1 mode active
int Po1
switchport access vlan 2222
switchport mode access
spanning-tree portfast edge
Config on Firepower from CLI(note this is a managed firepower):
enter port-channel 1
enable
enter member-port 1 1
enable
enable
enter member-port 1 2
enable
exit
set auto-negotiation yes
set descr ""
set duplex fullduplex
set flow-control-policy default
set lacp-policy-name default
set port-channel-mode active
set port-type data
set speed 1gbps
I'm not sure if i have explained this very well so if there are any questions please hit me up. also see attached a diagram
