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multipath (Protocols IS-IS)

 

Syntax

Hierarchy Level

Release Information

Statement introduced in Junos OS Release 9.6.

Description

Enable load balancing for multiple label-switched paths (LSPs).

Options

lsp-equal-costConfigure LSPs to be retained as equal cost paths for load balancing when a better route metric is added to the routing table.

When a route with an improved metric is added to the IS-IS internal routing table, IS-IS flushes all next-hop information (including LSP next-hop information) for a route. This is undesirable, because certain equal-cost multipath (ECMP) path combinations can be lost during route calculation. To override this default IS-IS behavior, include the lsp-equal-cost statement for load balancing, so that the equal cost path information is retained in the routing table.

Required Privilege Level

routing—To view this statement in the configuration.

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