78
Step Command
Remarks
2.
Enter OSPF view.
ospf
[
process-id
|
router-id
router-id
|
vpn-instance
vpn-instance-name
] *
N/A
3.
Redistribute a default
route.
default-route-advertise
[ [ [
always
|
permit-calculate-other
] |
cost
cost
|
route-policy
route-policy-name
|
type
type
] * |
summary cost
cost
]
By default, no default route is
redistributed.
This command is applicable
only to VPNs. The PE router
advertises a default route in a
Type-3 LSA to a CE router.
Configuring default parameters for redistributed routes
Perform this task to configure default parameters for redistributed routes, including cost, tag, and type.
Tags indicate information about protocols. For example, when redistributing BGP routes, OSPF uses tags
to identify AS IDs.
To configure the default parameters for redistributed routes:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter OSPF view.
ospf
[
process-id
|
router-id
router-id
|
vpn-instance
vpn-instance-name
] *
N/A
3.
Configure the default
parameters for
redistributed routes (cost,
upper limit, tag, and
type).
default
{
cost
cost
|
tag
tag
|
type
type
} *
By default, the cost is 1, the tag
is 1, and the type is Type-2.
Advertising a host route
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter OSPF view.
ospf
[
process-id
|
router-id
router-id
|
vpn-instance
vpn-instance-name
] *
N/A
3.
Enter area view.
area
area-id
N/A
4.
Advertise a host route.
host-advertise
ip-address cost
By default, no host route is
advertised.
Tuning and optimizing OSPF networks
You can use one of the following methods to optimize an OSPF network:
•
Change OSPF packet timers to adjust the convergence speed and network load. On low-speed
links, consider the delay time for sending LSAs.
