hash-mode

Syntax

Hierarchy Level

Description

Select the mode for the hashing algorithm.

The hashing algorithm is used to make traffic-forwarding decisions for traffic entering a LAG bundle or for traffic exiting a switch when ECMP is enabled.

For LAG bundles, the hashing algorithm determines how traffic entering a LAG bundle is placed onto the bundle’s member links. The hashing algorithm tries to manage bandwidth by evenly load-balancing all incoming traffic across the member links in the bundle.

When ECMP is enabled, the hashing algorithm determines how incoming traffic is forwarded to the next-hop device.

The hash mode that is set using this statement determines which fields are inspected by the hashing algorithm. You must set the hash mode to layer2-payload if you want the hashing algorithm to inspect fields in the Layer 2 payload when making hashing decisions. You must set the hash mode to layer2-header if you want the hashing algorithm to inspect fields in the Layer 2 header when making hashing decisions.

If the hash mode is set to layer2-payload, you can set the fields used by the hashing algorithm to hash IPv4 traffic using the set forwarding-options enhanced-hash-key inet statement. You can set the fields used by the hashing algorithm to hash IPv6 traffic using the set forwarding-options enhanced-hash-key inet6 statement.

If the hash mode is set to layer2-header, you can set the fields that the hashing algorithm inspects in the Layer 2 header using the set forwarding-options enhanced-hash-key layer2 statement.

Default

layer2-payload

Options

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 13.2X51-D15.

Statement is not supported on QFX10002 and QFX 10008 switches.

Hash mode option gtp-header-offset introduced in Junos OS Release 17.3R3 for QFX5000 line of switches.