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Configuring OSPFv3 route summarization
If contiguous network segments exist in an area, use the
abr-summary
command to summarize them into
one network segment on the ABR. The ABR will advertise only the summary route. Any LSA in the
specified network segment will not be advertised, reducing the LSDB size in other areas.
Follow these steps to configure route summarization:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter OSPFv3 view
ospfv3
[
process-id
]
—
Enter OSPFv3 area view
area
area-id
—
Configure a summary route
abr-summary
ipv6-address
prefix-length
[
not-advertise
]
Required
Not configured by default
NOTE:
The
abr-summary
command takes effect on ABRs only.
Configuring OSPFv3 inbound route filtering
According to some rules, you can configure OSPFv3 to filter routes that are computed from received
LSAs.
Follow these steps to configure OSPFv3 inbound route filtering:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter OSPFv3 view
ospfv3
[
process-id
]
—
Configure inbound route
filtering
filter-policy
{
acl-number
|
ipv6-prefix
ipv6-prefix-name
}
import
Required
Not configured by default
NOTE:
Using the
filter-policy
import
command can only filter routes computed by OSPFv3. Only routes not
filtered out can be added into the local routing table.
Configuring an OSPFv3 cost for an interface
You can configure an OSPFv3 cost for an interface with one of the following methods:
•
Configure the cost value in interface view
•
Configure a bandwidth reference value for the interface, and OSPFv3 computes the cost
automatically based on the bandwidth reference value: Interface OSPFv3 cost = Bandwidth
reference value (100 Mbps) ÷ Interface bandwidth (Mbps). If the calculated cost is greater than
65535, the value of 65535 is used; if the calculated cost is smaller than 1, the value of 1 is used.
If the cost value is not configured for an interface, OSPFv3 computes the interface cost value
automatically.
Follow these steps to configure an OSPFv3 cost for an interface:
