Alcatel-Lucent 7750 SR Manual page 1407

Os services guide

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A route can be learned by the router from different protocols in which case the costs are not

comparable, when this occurs the preference is used to decide to which route will be used.

Different protocols should not be configured with the same preference, if this occurs the tiebreaker is

per the default preference table as defined in the following table. If multiple routes are learned with

an identical preference using the same protocol, the lowest cost route is used.

If multiple routes are learned with an identical preference using the same protocol and the costs

(metrics) are equal, then the decision of what route to use is determined by the configuration of the

ecmp in the config>router context.

The no form of the command reverts to the default value.

preference 10 — OSPF internal routes have a preference of 10.

preference — The preference for internal routes expressed as a decimal integer. Defaults for different

reference-bandwidth

reference-bandwidth reference-bandwidth

no reference-bandwidth

config>service>vprn>ospf

config>service>vprn>ospf3

This command configures the reference bandwidth in kilobits per second (Kbps) that provides the

reference for the default costing of interfaces based on their underlying link speed.

7750 SR OS Services Guide

route types are listed in the following table.

Direct attached

Static routes

OSPF internal

IS-IS level 1 internal

IS-IS level 2 internal

OSPF external

IS-IS level 1 external

IS-IS level 2 external

a. Preference for OSPF internal routes is configured with the preference command.

Virtual Private Routed Network Services

Configurable