H3C Technologies H3C S6800 Series Switches - Manual (Page 20)

13
Step Command Remarks
3. Disable routing loop
detection.
vpn-instance-capability simple
By default, routing loop detection
is enabled.
You must disable routing loop
detection for a VPN OSPF process
on the MCE. Otherwise, the MCE
cannot receive OSPF routes from
the PE.
4. (Optional.) Configure the
OSPF domain ID.
domain-id domain-id [ secondary ] The default domain ID is 0.
5. (Optional.) Configure the type
codes of OSPF extended
community attributes.
ext-community-type { domain-id
type-code1 | router-id type-code2
| route-type type-code3 }
The defaults are as follows:
• 0x0005 for Domain ID.
• 0x0107 for Router ID.
• 0x0306 for Route Type.
6. (Optional.) Configure the
external route tag for
imported VPN routes.
route-tag tag-value
By default, no route tag is
configured.
In some networks, a VPN might be
connected to multiple MCEs.
When one MCE advertises 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. HP
recommends that you configure the
same route tag for the same VPN
on the MCEs.
7. Redistribute the VPN routes.
import-route protocol [ process-id
| all-processes | allow-ibgp ]
[ allow-direct | cost cost |
route-policy route-policy-name |
tag tag | type type ] *
By default, no routes are
redistributed into OSPF.
8. (Optional.) Configure OSPF
to redistribute the default
route.
default-route-advertise summary
cost cost
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 PE.
9. (Optional.) Configure filtering
of advertised routes.
filter-policy { acl-number |
prefix-list prefix-list-name } export
[ protocol [ process-id ] ]
By default, redistributed routes are
not filtered.
10. (Optional.) Configure the
default parameters for
redistributed routes (cost,
route number, tag, and type).
default { cost cost | tag tag | type
type } *
The default cost is 1, the default tag
is 1, and default type of
redistributed routes is Type-2.
11. Create an OSPF area and
enter OSPF area view.
area area-id
By default, no OSPF area is
created.