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multipath
Enables load balancing for composite-paths.
Syntax: [no] multipath
Description: Composite-Paths (TE-ECMP) provide for the load balanced forwarding of MPLS traffic to a common egress over multiple equal cost parallel paths. The ingress LSR splits the traffic proportional to the bandwidth reservation amount of the LSP across multiple equal cost MPLS LSPs destined to the same egress. Composite-paths are made up of all tunnels going to the same egress, but load balancing takes place over the lowest equal cost members.
All tunnels to the same egress are automatically grouped into a single composite path regardless of cost. Whether load balancing is enabled or disabled determines whether TE-ECMP behavior takes place. With load balancing disabled, IPriori selects a single composite-path lowest cost tunnel to the egress and forwards all MPLS traffic over the selected tunnel. With load balancing enabled, TE-ECMP behavior is automatic. If multiple tunnels exist to the same egress, IPriori selects all of the lowest same cost tunnels to share the traffic load. For each of the lowest equal cost tunnels available to the same egress, IPriori computes a weight proportional to the bandwidth reservation amount configured for the tunnel and divides the traffic between the tunnels accordingly.
To enable composite-paths load balancing on a router, use the multipath command in global MPLS TE command mode.
To disable composite-paths load balancing on a router, use the no multipath command in global MPLS TE command mode.
Factory Default: Disabled.
Command Mode: Global MPLS-TE.
Example 1: In the following example, the composite-paths load balancing is enabled for this router:
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router(config)#mpls te ospf
router(config-te)#multipath
router(config-te)#end
router#
Example 2: In the following example, the composite-paths load balancing is disabled for this router:
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router(config)#mpls te ospf
router(config-te)#no multipath
router(config-te)#end
router#
Related Commands: disjoint-with
non-disjoint
show mpls te tunnel
standby
standby-for
standby-trigger
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Copyright © 2004
Avici Systems Inc.
Avici® and TSR®
is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are
trademarks of Avici Systems Inc.
Source
File Name: TE%20Commands.fm
HTML File Name: TE%20Commands47.html
Last Updated: 12/19/04 at 14:56:07