Table of Contents
To do...
Enable OSPF to import
routes of other protocols
Apply a filter policy for
imported routes
Configure the default
values of the route
attributes (including cost,
limit, tag, and type) for the
routes imported
Configure to Use IS-IS between a MCE and a PE
When configuring to use IS-IS between a MCE and a PE, you need to configure the IS-IS processes to
be bound to VPN instances and manually import the VPN routes in the site maintained by the MCE
device to the routing table of the PE.
In IS-IS, routes discovered by other routing protocols are external routes. While importing routes of
other protocols, you can specify the default cost value for the imported routes as well. You can also
apply filter policies for imported routes.
Follow these steps to configure IS-IS to import external routes:
To do...
Enter system view
Enable IS-IS for a VPN
instance and enter IS-IS
view
Import routes of other
protocols
Apply a filter policy for
imported routes
Use the command...
import-route protocol [ process-id |
allow-ibgp ] [ cost cost | type type |
tag tag | route-policy
route-policy-name ] *
filter-policy { acl-number | ip-prefix
ip-prefix-name } export [ protocol
[ process-id ] ]
default { cost cost | limit limit | tag
tag | type type } *
Use the command...
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
import-route { isis [ process-id ] |
ospf [ process-id ] | rip [ process-id ]
| bgp [ allow-ibgp ] | direct | static }
[ cost cost | cost-type { external |
internal } | [ level-1 | level-1-2 |
level-2 ] | route-policy
route-policy-name | tag tag ] *
filter-policy { acl-number | ip-prefix
ip-prefix-name | route-policy
route-policy-name } export [ isis
process-id | ospf process-id | rip
process-id | bgp | direct | static ]
2-10
Remarks
Required
By default, OSPF does not
import the routes of other
protocols.
Optional
By default, no filter policy is
applied.
Optional
The default route attributes are
as follows: the cost value is 1,
the upper limit on the maximum
number of imported external
routes is 1,000, the tag value is
1, and the type is type2.
Remarks
—
—
Required
By default, IS-IS does not
import routes of other
protocols.
If none of the level-1, level-2,
and level-3 keywords is
specified, the external routes
are imported to level-2 routing
table.
Optional
By default, no filter policy is
applied.
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Troubleshooting
