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IP Routing Features

Configuring OSPF

4. Modifying the Redistribution Metric Type. The redistribution metric

type is used by default for all routes imported into OSPF. Type 1 metrics are

the same “units” as internal OSPF metrics and can be compared directly. Type

2 metrics are not directly comparable, and are treated as larger than the largest

internal OSPF metric.

Syntax: router ospf metric-type < type1 | type2 >

Globally reconfigures the redistribution metric type on an

ASBR.

type1: Specifies the OSPF metric plus the external metric for an

external route.

type2: Specifies the external metric for an external route.

Default: type2

For example, to change from the default setting on an ASBR to type 1, enter

the following command:

ProCurve(config)# router ospf metric-type type1

8. Optional: Configure Ranges on an ABR To Reduce

Advertising to the Backbone

Configuring ranges does the following to reduce inter-area advertising:

■ Summarizing Routes: Enable a routing switch operating as an ABR to

use a specific IP address and mask to summarize a range of IP addresses

into a single route advertisement for injection into the backbone. This

results in only one address being advertised to the network instead of all

the addresses within that range. This reduces LSA traffic and the

resources needed to maintain routing tables.

■ Blocking Routes: Prevent an ABR from advertising specific networks or

subnets to the backbone area.

Each OSPF area supports up to 8 range configurations.

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ProCurve 8200zl Uživatelská příručka Strana 238