136
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IS-IS view.
isis
[
process-id
] [
vpn-instance
vpn-instance-name
]
N/A
3.
Filter routes calculated
using received LSPs.
filter-policy
{
acl-number
|
prefix-list
prefix-list-name
|
route-policy
route-policy-name
}
import
By default, IS-IS route
filtering is not configured.
Filtering redistributed routes
IS-IS can redistribute routes from other routing protocols or other IS-IS processes, add them to the IS-IS
routing table, and advertise them in LSPs.
Perform this task to filter redistributed routes. Only routes that are not filtered can be added to the IS-IS
routing table and advertised to neighbors.
To filter redistributed routes:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IS-IS view.
isis
[
process-id
] [
vpn-instance
vpn-instance-name
]
N/A
3.
Filter routes redistributed from
other routing protocols or IS-IS
processes.
filter-policy
{
acl-number
|
prefix-list
prefix-list-name
|
route-policy
route-policy-name
}
export
[
protocol
[
process-id
] ]
By default, IS-IS route
filtering is not configured.
Configuring IS-IS route leaking
Perform this task to control route advertisement (route leaking) between Level-1 and Level-2.
You can configure IS-IS to advertise routes from Level-2 to Level-1, and to not advertise routes from Level-1
to Level-2.
To configure IS-IS route leaking:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IS-IS view.
isis
[
process-id
] [
vpn-instance
vpn-instance-name
]
N/A
3.
Configure route
leaking from Level-1 to
Level-2.
import-route isis level-1
into level-2
[
filter-policy
{
acl-number
|
prefix-list
prefix-list-name
|
route-policy
route-policy-name
} |
tag
tag
] *
By default, IS-IS advertises
routes from Level-1 to
Level-2.
4.
Configure route
leaking from Level-2 to
Level-1.
import-route isis level-2 into level-1
[
filter-policy
{
acl-number
|
prefix-list
prefix-list-name
|
route-policy
route-policy-name
} |
tag
tag
] *
By default, IS-IS does not
advertise routes from
Level-2 to Level-1.
