C
HAPTER
45
| IP Routing Commands
Open Shortest Path First (OSPFv2)
– 1045 –
default-information
originate
This command generates a default external route into an autonomous
system. Use the no form to disable this feature.
SYNTAX
default-information originate [always] [metric interface-metric]
[metric-type metric-type]
no default-information originate [always | metric | metric-type]
always - Always advertise itself as a default external route for the
local AS regardless of whether the router has a default route. (See
"ip route" on page 1020.)
interface-metric - Metric assigned to the default route.
(Range: 0-16777214)
metric-type - External link type used to advertise the default route.
(Options: Type 1, Type 2)
COMMAND MODE
Router Configuration
DEFAULT SETTING
Disabled
Metric: 20
Metric Type: 2
COMMAND USAGE
â—† If the always parameter is not selected, the router can only advertise a
default external route into the AS if it has been configured to import
external routes through other routing protocols or static routing, and
such a route is known. (See the redistribute command.)
â—† The metric for the default external route is used to calculate the path
cost for traffic passed from other routers within the AS out through the
ASBR.
â—† When you use this command to redistribute routes into a routing
domain (i.e., an Autonomous System, this router automatically
becomes an Autonomous System Boundary Router (ASBR). However,
an ASBR does not, by default, generate a default route into the routing
domain.
â–
If you use the always keyword, the router will advertise itself as a
default external route into the AS, even if a default external route
does not actually exist. To define a default route, use the ip route
command.
â–
If you do not use the always keyword, the router can only
advertise a default external route into the AS if the redistribute
command is used to import external routes via RIP or static routing,
and such a route is known.
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