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L3 Etherchannel is not working

Hello,

I'm testing out etherchannels. I created an L2 etherchannel successfully using fa0/23 and fa0/24 on 2 switches, nothing fancy just very basic configuration like the following:

SW1(config)#int range fa0/23 - 24

shut

channel-group 1

no shut

Applied same configuration on SW2 and worked perfectly fine, I checked out the status of etherchannel using the commands:

show port-channel 1 summary

show span vlan 1

After that I tried to create an L3 etherchannel so I applied the following commands

SW1(config)#int range fa0/23 - 24

no switchport

int port-channel 1

no switchport

ip address 192.168.100.1 255.255.255.0

FYI... int vlan 1 on SW1 has an IP of 192.168.0.1 255.255.255.0

I applied same config on SW and used an IP address of 192.168.100.2/24 for the port-channel interface while int vlan 1 has an IP of 192.168.0.2/24 on SW2. From SW1 I pinged 192.168.100.2 which is the ip of the etherchannel on SW2 but I got no replies at all. I checked out the status of port-channel 1 on both SW1 and SW2 using the command show int port-channel 1 and I got the same results on both switches, the results were that both L1 and L2 (interface and protocol) were down!

What should I check next to get the L3 etherchannel working?

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Accepted Solutions
Cisco Employee

L3 Etherchannel is not working

Hi Eesa,

Sorry for late response I just tested this and its working fine and as such it should work as per excepted.

Kindly do the following steps on both the devices:

1- Default the interface config( Conf# default interface range F0/23-24  & default interface range P1)

2- Check the interface status ( show interface f0/23 & 24 and make sure both are in UP UP state).

3- Kindly first configure the Layer 3 Port-channel on  both the devices.

4- Shut down the interfaces F0/23 - 24 , then apply the config on ports. (i.e channel-group 1)

5- Once both the sides its configured then enable the ports.

Please see result on my lab devices below: Output only from Switch 1:

SW1#ping 192.168.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/9 ms

SW1#ping 192.168.0.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.2, timeout is 2 seconds:

.!!!!

Success rate is 80 percent (4/5), round-trip min/avg/max = 1/3/9 ms

SW1#ping 192.168.100.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.100.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

SW1#ping 192.168.100.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.100.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

HTH

Regards

Inayath

1 REPLY
Cisco Employee

L3 Etherchannel is not working

Hi Eesa,

Sorry for late response I just tested this and its working fine and as such it should work as per excepted.

Kindly do the following steps on both the devices:

1- Default the interface config( Conf# default interface range F0/23-24  & default interface range P1)

2- Check the interface status ( show interface f0/23 & 24 and make sure both are in UP UP state).

3- Kindly first configure the Layer 3 Port-channel on  both the devices.

4- Shut down the interfaces F0/23 - 24 , then apply the config on ports. (i.e channel-group 1)

5- Once both the sides its configured then enable the ports.

Please see result on my lab devices below: Output only from Switch 1:

SW1#ping 192.168.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/9 ms

SW1#ping 192.168.0.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.2, timeout is 2 seconds:

.!!!!

Success rate is 80 percent (4/5), round-trip min/avg/max = 1/3/9 ms

SW1#ping 192.168.100.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.100.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

SW1#ping 192.168.100.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.100.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

HTH

Regards

Inayath

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