HP 3500YL - Manual (Page 250)

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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