Purpose
Command or Action
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 of data traffic or
routing loops.
—
Repeat Step 9 for all neighbors on the interface.
Step 10
Enters area configuration mode.
exit
Example:
Step 11
RP/0/RP0/CPU0:router(config-ospf-ar-if)# exit
Enters interface configuration mode and associates one or
more interfaces for the area configured in Step 4.
interface type interface-path-id
Example:
Step 12
• In this example, the interface inherits the
nonbroadcast network type and the hello and dead
RP/0/RP0/CPU0:router(config-ospf-ar)# interface
GigabitEthernet 0/3/0/1
intervals from the areas because the values are not
set at the interface level.
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
Example:
address is specified in hexadecimal using 16-bit
values between colons.
RP/0/
/CPU0:router(config-ospf-ar)# neighbor 10.34.16.6
• The
priority
keyword notifies the router that this
neighbor is eligible to become a DR or BDR. The
or
RP/0/
/CPU0:router(config-ospf-ar)# neighbor
fe80::3203:a0ff:fe9d:f3f
priority value should 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.
• 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.
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
287
Implementing OSPF
Configuring Neighbors for Nonbroadcast Networks