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Dell EMC SmartFabric OS10 User Guide Release 10.5.1

PDF

Load balancing

To increase bandwidth, traffic is balanced across member links. RTAG7 is a hash algorithm that load balances traffic within a trunk group in a controlled manner. RTAG7 balances traffic to more effectively use member links as traffic gets more diverse.

RTAG7 generates a hash that consists of two parts:

  • The first part generates from packet headers to identify micro-flows in traffic. By default, all listed parameters are enabled for load balancing except the ingress port.
    OS10# show load-balance
    
    Load-Balancing Configuration For LAG and ECMP:
    ----------------------------------------------
    IPV4 Load Balancing         : Enabled
    IPV6 Load Balancing         : Enabled
    MAC Load Balancing          : Enabled
    TCP-UDP Load Balancing      : Enabled
    Ingress Port Load Balancing : Disabled
    IPV4 FIELDS   : source-ip destination-ip protocol vlan-id l4-destination-port l4-source-port
    IPV6 FIELDS   : source-ip destination-ip protocol vlan-id l4-destination-port l4-source-port
    MAC FIELDS    : source-mac destination-mac  ethertype  vlan-id
    TCP-UDP FIELDS: l4-destination-port  l4-source-port
  • The second part generates from the static physical configuration such as the ingress and egress port numbers.
To generate load balancing based on any parameters, change the hash field using the load-balance command. The example shows how to enable the ingress port to generate load balancing based on the ingress parameter.
OS10(config)# load-balancing ingress-port enable
OS10(config)# do show load-balance
Load-Balancing Configuration For LAG and ECMP:
----------------------------------------------
IPV4 Load Balancing         : Enabled
IPV6 Load Balancing         : Enabled
MAC Load Balancing          : Enabled
TCP-UDP Load Balancing      : Enabled
Ingress Port Load Balancing : Enabled 
IPV4 FIELDS   : source-ip destination-ip protocol vlan-id l4-destination-port l4-source-port
IPV6 FIELDS   : source-ip destination-ip protocol vlan-id l4-destination-port l4-source-port
MAC FIELDS    : source-mac destination-mac ethertype vlan-id
TCP-UDP FIELDS: l4-destination-port  l4-source-port

Configuration notes

Dell EMC PowerSwitch S4200–ON Series:

Theload-balancing command does not work with the tcp-udp-selection parameter.


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