default (OSPF view)

Function

The default command configures default parameters for OSPF to import external routes. The parameters include the cost, type (Type 1 or Type 2), and tag.

The undo default command restores the default setting.

By default, the default cost of the external routes is 1; the type of the imported external routes is Type 2; the default tag value is 1.

Format

default { cost { costvalue | inherit-metric } | tag tagvalue | type typevalue } ^*

undo default { cost [ { costvalue | inherit-metric } ] | tag [ tagvalue ] | type [ typevalue ] } ^*

Parameters

Parameter	Description	Value
cost costvalue	Specifies the default cost of the external routes imported by OSPF.	The value is an integer ranging from 0 to 16777214. The default value is 1.
inherit-metric	Indicates that the cost of the imported route is the one carried in the route. If no cost is specified, the default cost set using the default command is used.	-
tag tagvalue	Specifies the tag of the external routes.	The value is an integer ranging from 0 to 4294967295. The default value is 1.
type typevalue	Specifies the type of the external routes.	The value is 1 or 2. 1: Type 1 external route 2: Type 2 external route The default value is 2.

Views

OSPF view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
ospf	write

Usage Guidelines

Usage Scenario

The imported external routes carry various parameters that can change the priorities and next hops of those routes in the OSPF routing table.

By setting default parameters for OSPF to import external routes, you can control OSPF route selection.

The route tag is used to identify protocol-related information. For example, it can be used to differentiate AS numbers when OSPF receives BGP routes. In addition, configuring tag can filter OSPF routes carrying tags.

Follow-up Procedure

The default (OSPF) command has the lowest priority. Therefore, you need to check whether other commands are configured before running this command. Otherwise, the function of this command does not take effect.

Precautions

You can run the following commands to set the cost of imported routes. The following commands are listed in descending order of cost priorities.

apply cost
import-route (OSPF)
default (OSPF)
The priority of the default (OSPF) command is the lowest among the three commands. Therefore, ensure that the other two commands are not configured when configuring this command. Otherwise, this command cannot take effect.

Example

# Set the default values of the cost, type, and tag.

<HUAWEI> system-view
[~HUAWEI] ospf 100
[*HUAWEI-ospf-100] default cost 10 tag 100 type 2