Release 1.0
Configuring Interfaces and TCP/IP Features
526360-001-00 Rev. B
MGBI
5-9
Loopback interfaces are used for the following reasons:
■
Collect accurate service-related information through an SNMP manager about
active or down interfaces on the BSR.
■
Indirectly access an outbound physical interface that cannot be directly accessed.
■
When the designated router election process occurs in OSPF, the designated
router choice can be forced by assigning a higher IP address for the loopback
address.
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.
A.B.C.D
is the subnetwork mask of the IP network, on which the interface is
associated.
3.
Use the
ip address secondary
command to optionally configure a secondary IP
address for the loopback interface, in Interface Configuration mode:
MOT(config-if)#
ip address
<
A.B.C.D
> <
A.B.C.D
>
secondary
[
host | mta
]
where:
Note:
A 32-bit mask (
255.255.255.255)
is permitted for a loopback IP
address.
Summary of Contents for BSR 2000
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