Release 1.0
Configuring OSPF
526360-001-00 Rev. B
MGBI
11-21
MOT
(config-if)#
ip ospf database-filter all out
Examples
The following example prevents flooding of OSPF LSAs to broadcast, non-broadcast,
or point-to-point networks accessible through Ethernet interface 7/0:
interface ethernet 0/0
ip ospf database-filter all out
Forcing Router ID Choice with Loopback Interface
OSPF uses the largest IP address configured on the interfaces as its router ID. If the
interface associated with this IP address goes down, or if the address is removed, the
OSPF process must recalculate a new router ID and send again all its routing
information.
If a loopback interface is configured with an IP address, the software uses this IP
address as its router ID, even if other interfaces have larger IP addresses. Since
loopback interfaces never go down, this provides greater stability in the routing table.
OSPF automatically prefers a loopback interface over any other kind, and it chooses
the highest IP address among all loopback interfaces. If no loopback interfaces are
present, the highest IP address in the router is chosen.
Up to 64 loopback interfaces can be configured on the BSR. Follow these steps to
define a loopback address:
1.
Use the
interface loopback
command in Global Interface mode, to define a
loopback interface:
MOT(config)#
interface loopback
<
1-64
>
where:
1-64
is the number of the loopback interface
2.
Use the
ip address
command in Interface Configuration mode to define an IP
address for the loopback interface that is a network broadcast address:
MOT(config-if)#
ip address
<
A.B.C.D
> <
A.B.C.D
>
where:
A.B.C.D
is the IP address of the BSR interface designated for the loopback
interface.
Summary of Contents for BSR 2000
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