LACP Load Balancing Method

[hschlecht]

We have two stack of 3750-X switchs interconnected through LACP, and a CheckPoint Firewall connected to one of the stack. The Firewall use a LACP bond to connect to the 3750-X Stack. On the Cisco switches we don't use any Layer3 functionality.

Since the switch are used in Layer2 mode, can we define the a load balancing method that use IP informations ?

For example Can we change the load balancing method from src-mac to src-dst-ip ?

BRgds

[chandra_rc16]

As far as i know. Yes we can configure loadbalancing based on source & destination IP. The switch can understand it in though in layer2 mode.

Regards,
Chandu

[Pierluigi Torriani]

  Hi,

yes you can choose the method of Load balancing in LACP:

port-channel load-balance {dst-ip | dst-mac | src-dst-ip | src-dst-mac | src-ip | src-mac}

Configure an EtherChannel load-balancing method.

The default is src-mac.

Select one of these load-distribution methods:

•dst-ip—Load distribution is based on the destination-host IP address.

•dst-mac—Load distribution is based on the destination-host MAC address of the incoming packet.

•src-dst-ip—Load distribution is based on the source-and-destination host-IP address.

•src-dst-mac—Load distribution is based on the source-and-destination host-MAC address.

•src-ip—Load distribution is based on the source-host IP address.

•src-mac—Load distribution is based on the source-MAC address of the incoming packet.

[moj_ccie]

Hello, It's completed in these mechanisms (Q1 2023):

• gtpu: IP and GTP-TEID
• inner-header: Inner header
• ip: IP
• ip-gre: IP, GRE key
• ip-l4port: IP and L4 port
• ip-l4port-vlan IP: L4 port and VLAN
• ip-vlan:  IP and VLAN
• ipv6-flow-label: IPv6 Flow Label
• l4port: L4 port
• mac: MAC
• mac-ip-l4port-vlan: MAC, IP, L4 port and VLAN

[Joseph W. Doherty]

BTW, LB defaults and choices can vary per platform.

[Joseph W. Doherty]

Yup, as also noted by other posters.

3750 series can work with L3 info even in L2 mode.