Port-channel dst-mac load balance

[bumbucha90]

Hi to all!

Could you please confirm my understanding of port-channel dst-mac load balance method?

Lets imagine that we have port-channel to server with two NICs which were teamed together.

Dst-mac load balance method was configured on switch.

Logic tells me, that traffic from switch to server will go only to one NIC all time.

In this case Dst-mac will be useless.

Am i right?

How it will work?

Sorry, if question looks very simple.

Thank you in advance.

[Kirk J]

Greetings.

If you have a baremetal host with effectively only one mac, and you are using dst-mac for hashing algorithm, then yes, inbound traffic to the server is going to primarily use one link.

Ideally, you want to use Source and destination TCP/UDP port number as the hash for making sure traffic is equally distributed over all links in the port-channel.

Thanks,

Kirk..

[ruchik999]

Hello,

You can also use below command to check the utilized link.

test etherchannel load-balance interface port-channel number {ip | l4port | mac} [source_ip_add | source_mac_add | source_l4_port] [dest_ip_add | dest_mac_add | dest_l4_port] command.