• Author : Nathan Wolfe

 
 

Lag Hashing Key Shift

Introduced in EOS-4.20.5, LAG hashing key shift controls how many bits we shift the LAG load balance key. Platform compatibility DCS-7280E DCS-7280R DCS-7280R2 DCS-7020R DCS-7500E DCS-7500R DCS-7500R2 Configuration The command to configure the LAG key shift is in the load balance profile (see https://eos.arista.com/eos-4-15-0f/lag-hashing/ for more information on how to configure load-balance profiles) 7500(config)#load-balance policies 7500(config-load-balance-policies)#load-balance sand profile p1 7500(config-sand-load-balance-profile-p1)# The key shift command is specific to LAGs 7500(config-sand-load-balance-profile-p1)#? fields Configure which headers/fields are used in the port-channel and ECMP hash packet-type Configure port-channel and ECMP hashing behavior specific to a packet type port-channel Configure port channel specific hash settings...
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LAG hashing on Ingress Interface

Introduced in EOS-4.20.5F, LAG ingress interface hashing controls whether the ingress interface is used in the LAG hashing calculation. Platform compatibility DCS-7280E DCS-7280R DCS-7280R2 DCS-7020R DCS-7500E DCS-7500R DCS-7500R2 Configuration The command to configure hashing on ingress interface is in the load balance profile (see https://eos.arista.com/eos-4-15-0f/lag-hashing/ for more information on how to configure load-balance profiles) 7500(config)#load-balance policies 7500(config-load-balance-policies)#load-balance sand profile p1 7500(config-sand-load-balance-profile-p1)# The ingress interface command is specific to LAGs 7500(config-sand-load-balance-profile-p1)#? fields Configure which headers/fields are used in the port-channel and ECMP hash packet-type Configure port-channel and ECMP hashing behavior specific to a packet type port-channel Configure port channel specific hash...
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LAG and ECMP selectable hashing fields

Description Introduced in EOS-4.20.1F, “selectable hashing fields” feature controls whether a certain header’s field is used in the hash calculation for LAG and ECMP. Platform Compatibility DCS-7280E DCS-7280R DCS-7280R2 DCS-7280R3 DCS-7020R DCS-7500E DCS-7500R DCS-7500R2 DCS-7500R3 DCS-7800R3 Feature History Release Update 4.20.1F Initial release 4.20.5F IPv4 and IPv6 Always On hashing fields made configurable 4.23.2F Support added for Symmetric Hashing on ECMP 4.25.1F Parsing of GTP and the IP header within GTP (7500R3 and 7280 R3 only) Inner and outer IPv4 header fields made separately configurable (7500R3 and 7280R3 only) Configuration The command to configure hashing fields is in the load...
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Global LAG Hashing Profiles

Users can now define a global LAG hashing profile. The global LAG hashing profile will be applied to all linecards which do not have a specific LAG hashing profile assigned to them. Platform compatibility This feature is available starting in EOS 4.17.0F on 7500E and 7500R systems. Configuration The user selects a LAG hashing profile to be designated global 7500(config)#port-channel load-balance sand profile ? WORD Name of the load-balance profile 7500(config)#port-channel load-balance sand profile myGlobalProfile The ‘default’ profile is a special profile which cannot be deleted and will be set to global if no other profile is selected to be...
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