local-bias

date_range 20-Nov-23

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Syntax

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local-bias percent bias;

Hierarchy Level

[edit interfaces rlt x logical-tunnel-options load-balance]

Description

Next hop addresses may be local or remote, and absent any other load balancing scheme (except adaptive load balancing), traffic can be expected to be more-or-less evenly distributed among the available next-hop addresses whether they are local or remote. You can skew distribution to favor local addresses, however, by setting a value for local bias (local relative to the packet forwarding engine (PFE) performing the packet look up).

For example, a value of 100 would exclude remote next-hop addresses from the traffic distribution by forcing 100% of next-hop traffic flows to use local addresses. A value of 50, on the other hand, would skew 50% of the flows that would otherwise use remote links so they use local links instead. That is, for a value set to 50, given four next-hop links, two of which are local and two of which are remote, each of the remote links could be expected to get one eighth of the flows (25% / 2) = 12.5%. Likewise, each of the local links could also be expected to receive about a third of the flows (25% + 12.5%) = 37.5%.

In contrast, with no value set for local bias, each of the four links would be expected to receive 25% of the total flows.

Required Privilege Level

interface - To view statement in the configuration.

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

Release Information

Statement introduced in Junos OS Release 19.2R1.

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