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JunosE 11.3.x IP, IPv6, and IGP Configuration Guide
neighbor
Traffic Engineering
Configuring OSPF for Traffic Engineering
282
host1(config-if)#ip ospf network broadcast
Use the no version to restore the default value for the medium.
See ip ospf network
Use to configure OSPF neighbors on the NBMA network.
Specify priority and poll interval only for routers that are eligible to become the
designated router or backup designated router—that is, a router with a nonzero router
priority value. The default priority value is 0, and the default polling interval is 120
seconds.
Example
host1(config-router)#neighbor 10.12.11.5 priority 100
Use the no version to remove the neighbor or restore the default values 0 and 120.
See neighbor
Traffic engineering enables more effective use of network resources by providing for the
setup of explicitly routed Multiprotocol Label Switching (MPLS) label-switched paths
(LSPs) that satisfy resource and administrative constraints. You can use OSPF to
exchange link resource and traffic-engineering administrative information between
routers. OSPF uses this information to calculate paths in the network that satisfy the
administrative constraints. MPLS can then set up LSPs along these paths. See JunosE
BGP and MPLS Configuration Guide for a detailed discussion of MPLS.
For OSPF to support traffic engineering, you must issue both of the following commands:
mpls traffic-eng area—Enables the router to flood traffic engineering resource and
administrative information in the specified area using type 10 opaque LSAs. These
LSAs have an area-wide scope and therefore are flooded only within the indicated
area.
mpls traffic-eng router-id—Designates a router as traffic engineering capable and
specifies the address of a stable router interface as the router ID of the node for traffic
engineering purposes. The traffic engineering router ID serves as the tunnel endpoint
for tunnels terminating at the node. Each node advertises its traffic engineering router
ID in type 10 LSAs.
By default, OSPF always uses the MPLS tunnel to reach the MPLS endpoint. Best paths
determined by SPF calculations are not considered. You can enable the consideration
of best paths by issuing the mpls spf-use-any-best-path command. As a result, OSPF
considers metrics for IGP paths and the tunnel metric, and might forward traffic along a
best path, through the MPLS tunnel, or both.
Copyright © 2010, Juniper Networks, Inc.
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