H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 257)

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OSPF basic functions
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Corresponding filters if routing information filtering is needed.
Configuring OSPF Route Summarization
OSPF route summarization includes:
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Configuring route summarization between OSPF areas on an ABR
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Configuring route summarization when redistributing routes into OSPF on an ASBR
Follow these steps to configure route summarization between OSPF areas on an ABR:
To do… Use the command… Remarks
Enter system view system-view —
Enter OSPF view
ospf [ process-id | router-id
router-id ] *
—
Enter OSPF area view area area-id Required
Configure ABR route
summarization
abr-summary ip-address { mask |
mask-length } [ advertise |
not-advertise ] [ cost cost ]
Required
Available on an ABR only
Not configured by default
Follow these steps to configure route summarization when redistributing routes into OSPF on an ASBR:
To do… Use the command… Remarks
Enter system view system-view —
Enter OSPF view ospf [ process-id | router-id router-id ] * —
Configure ASBR route
summarization
asbr-summary ip-address { mask |
mask-length } [ tag tag | not-advertise |
cost cost ] *
Required
Available on an ASBR only
Not configured by default
Configuring OSPF Inbound Route Filtering
Follow these steps to configure inbound route filtering:
To do… Use the command… Remarks
Enter system view system-view —
Enter OSPF view ospf [ process-id | router-id router-id ] * Required
Configure inbound route
filtering filter-policy { acl-number | ip-prefix ip-prefix-name |
gateway ip-prefix-name } import
Required
Not configured by default
Since OSPF is a link state-based interior gateway protocol, routing information is contained in LSAs.
However, OSPF cannot filter LSAs. Using the filter-policy import command is to filter routes
computed by OSPF, and only routes not filtered out are installed into the routing table.