PurposeCommand or Action
Configures the IPv4 address of OSPF neighbors interconnecting to
nonbroadcast networks.
Do one of the following:
Step 13
•
neighbor ip-address [ priority number ] [
poll-interval seconds ][ cost number ] [
database-filter [ all ]]
or
Configures the link-local IPv6 address of OSPFv3 neighbors.
•
neighbor ipv6-link-local-address [ priority
number ] [ poll-interval seconds ][ cost
number ] [ database-filter [ all ]]
•
The ipv6-link-local-address argument must be in the form
documented in RFC 2373 in which the address is specified in
hexadecimal using 16-bit values between colons.
•
The priority keyword notifies the router that this neighbor
is eligible to become a DR or BDR. The priority value should
Example:
RP/0/RSP0
/CPU0:router(config-ospf-ar)# neighbor
10.34.16.6
match the actual priority setting on the neighbor router. The
neighbor priority default value is zero. This keyword does not
apply to point-to-multipoint interfaces.
or
RP/0/RSP0
/CPU0:router(config-ospf-ar)# neighbor
fe80::3203:a0ff:fe9d:f3f
•
The poll-interval keyword does not apply to
point-to-multipoint interfaces. RFC 1247 recommends that
this value be much larger than the hello interval. The default
is 120 seconds (2 minutes).
•
Neighbors with no specific cost configured assumes the cost
of the interface, based on the cost command. On
point-to-multipoint interfaces, cost number is the only
keyword and argument combination that works. The cost
keyword does not apply to NBMA networks.
•
The database-filter keyword filters outgoing LSAs to an
OSPF neighbor. If you specify the all keyword, incoming
and outgoing LSAs are filtered. Use with extreme caution
since filtering may cause the routing topology to be seen as
entirely different between two neighbors, resulting in “
black-holing” or routing loops.
—
Repeat Step 13 for all neighbors on the interface.
Step 14
commit
Step 15
Configuring Authentication at Different Hierarchical Levels for OSPF Version
2
This task explains how to configure MD5 (secure) authentication on the OSPF router process, configure one
area with plain text authentication, and then apply one interface with clear text (null) authentication.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
366 OL-30423-03
Implementing OSPF
Configuring Authentication at Different Hierarchical Levels for OSPF Version 2
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