H3C S5820V2H Configuration Manual page 16

Step
5. (Optional.) Configure the
external route tag for
imported VPN routes.
6. Redistribute remote site routes
advertised by the PE.
7. (Optional.) Configure OSPF
to redistribute the default
route.
8. Create an OSPF area and
enter OSPF area view.
9. Enable OSPF on the interface
attached to the specified
network in the area.
Configuring IS-IS between an MCE and a VPN site
An IS-IS process belongs to the public network or a single VPN instance. If you create an IS-IS process
without binding it to a VPN instance, the process belongs to the public network.
Binding IS-IS processes to VPN instances can isolate routes of different VPNs.
To configure IS-IS between an MCE and a VPN site:
Step
1. Enter system view.
2. Create an IS-IS process for a
VPN instance and enter IS-IS
view.
3. Configure a network entity
title.
Command
route-tag tag-value
import-route protocol [ process-id
| allow-ibgp ] [ cost cost | type
type | tag tag | route-policy
route-policy-name ] *
default-route-advertise summary
cost cost
area area-id
network ip-address wildcard-mask
Command
system-view
isis [ process-id ] vpn-instance
vpn-instance-name
network-entity net
9
Remarks
By default, no route tag is
configured.
In some networks, a VPN might be
connected to multiple MCEs.
When one MCE advertise the
routes learned from BGP to the
VPN, the other MCEs might learn
the routes, resulting in routing
loops. To avoid such routing loops,
you can configure route tags for
VPN instances on an MCE. H3C
recommends configuring the same
route tag for the same VPN on the
MCEs.
By default, OSPF does not
redistribute routes from any other
routing protocol.
By default, OSPF does not
redistribute the default route.
This command redistributes the
default route in a Type-3 LSA. The
MCE advertises the default route to
the site.
By default, no OSPF area is
created.
By default, an interface does not
run OSPF.
Remarks
N/A
Perform this configuration on the
MCE. On the VPN site, configure a
normal IS-IS process.
By default, no NET is configured.