Dell PowerSwitch S4112F-ON EMC SmartFabric OS10 User Guide Release 10.5.1 - Page 701
Load balancing, Restrictions on ECMP Static Routes
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Configure the hash algorithm in CONFIGURATION mode. hash-algorithm ecmp {crc | crc16cc | crc32LSB | crc32MSB | xor | xor1 | xor2 | xor4 | xor8 | random} Change hash algorithm OS10(config)# hash-algorithm ecmp crc Restrictions on ECMP Static Routes When you configure static route leaking, all the Equal-cost multipath (ECMP) static routes from the source do not leak to the destination VRF instance. Only a single ECMP route, normally the best ECMP route, leaks to the destination VRF instance. 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. Layer 3 701
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