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advanced-forwarding

Syntax

Hierarchy Level

Description

You can use the advanced-forwarding mode to configure maximum ECMP beyond the default 128 next hops to up to 512 next hops on AFT-based line cards. This is useful for example when you have enabled symmetric consistent hash towards remote dynamic tunnel destinations (MPLS over UDP).

When in advanced-forwarding mode, only AFT-based linecards are powered on, and all UKERN-based linecards are powered off. After configuring advanced-forwarding mode a chassis reboot is required, because without chassis reboot the advanced-forwarding mode will not take effect.

Note:

  • Use the show chassis interoperabilty command to check if the device is in advanced-forwarding or default mode.

  • In advanced-forwarding mode, Adaptive Load Balancing (ALB) over ECMP is not supported.

Platform Support

MX301, MX304, MX480, MX960, MX2010, and MX2020

Default

In default mode, you can configure only up to 128 ECMP next-hops

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 26.2