ecmp-local-bias
Syntax
ecmp-local-bias;
Hierarchy Level
[edit forwarding-options load-balance]
Description
By default, equal cost multi-path (ECMP) traffic flows are distributed more-or-less
equally between forwarding next-hops. Enable ecmp-local-bias to
have ECMP traffic prefer local forwarding next-hops (that is, local to the packet
forwarding engine (PFE) that is performing the packet look up) over remote ones, and
to distribute the flows among local members. Local bias percentages cannot be
assigned. Note that ecmp-local-bias is not intended to be used in
conjunction with any other load balancing schemes.
This feature applies chassis-wide. It supports BGP prefixes that are directly reachable with IPv4 MPLS ECMP next-hops on Gigabit Ethernet (ge-) and 10-Gigabit Ethernet (xe-) interfaces. Multicast traffic is not affected.
Use ecmp-local-bias when you need to direct ECMP traffic towards
local links, for example, to ensure that the overall load on the fabric is
reduced.
For packet forwarding engine (PFE) to achieve the functionality of ECMP local
bias, the dependent config knob of ecmp-fast-reroute is required. In MX
platforms, ecmp-fast-reroute configuration command is available
as an explicit router configuration.
Default
Not enabled
Required Privilege Level
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 19.2R1.