Hello once again Genesis,
I guess first you should issue which protocol of aggregarting you would like to use by issuing:
#channel-protocol lacp, I guess it's missed in your configuration as it should appear per the show run output!
and then try! if it's anyway not working so, let me consider that the etherchannel is aimed to be between a switch and a working station (with 2 teamed NICs),
such a behavior is related to the load-balance used method. The switch is using an algorithm to balance the transmission of data through its links depending on the method type (src-mac, src-ip, dst-mac, dst-ip, src-dst-mac, src-dst-ip), and as a result of these calculations, the switch is giving a priority to 1 of the links over the other! Also, the teamed NICs has the same function which enabling you to choose the method of load balancing!
I expect that the suspended link is the dominant one, and when it's suspended form the switch side , it's still considered up for the teamed NICs, so it trys to send transmissions through it, but once you shut it down, the teamed NIC will consider it down and at this moment the sencond link is the only choice to transmit the data!
The problem now, is that there is only 1 ip address for your SVI, as well as only 1 ip address of the team NICs, so each time the communication (pinging from from the workstation to the SVI) will take place though the same link! (also the same if we are talking about the MAC addresses)
I suggest to set your load balancing method of your team NICs to be dst-ip as well as on the switches by typing #port-channel load-balance dst-ip, and then change the IP add of the workstation as well as the switch SVI, so that the logic OR operation of the last 1 rightmost bit of the 2 addresses will be one time 0 (here it will use 1 link) and another time 1 (here will use another link), and in each time try to ping from your workstation during the link suspension! one of them for sure will work even during the suspension which will show that the not suspended link now is the dominant!
I know if you are not familiar with what i have mentioned, it will look like confusing issue for you, so I will write now for you IP address directly to try that you will not think about how to choose IPs according to the XOR (logic or) operation:
only because I don't know your IP plan, so let's consider new IP addresses:
First: consider the switch SVI IP address: 192.168.1.1 (the rightmost bit is 1)
and consider the workstation IP address: 192.168.1.2 (the rightmost bit is 0)
so 1 XOR 0 = 1
now one will be used.
Second: consider the switch SVI IP address: 192.168.1.1 (the rightmost bit is 1)
and consider the workstation IP address: 192.168.1.3 (the rightmost bit is 1)
so 1 XOR 1 = 0
now another link will be used.
I will be happy if you try and provide us the updates!
I also recommend to fix the speed and of the link and to configure portfast to the access ports!
I hope it's helpful enough to get rating! also please, don't forget to mark my reply as a solution if it helps you to solve your problem! it will be so nice from you!
Bst Rgds,
Andrew Khalil
