Huawei Quidway S8500 Series Command Manual page 795

Command Manual – MPLS
Quidway S8500 Series Routing Switches
backbone, you need to configure a Sham-link between the two PE routers. The sham
link between VPN PE routers is taken as a link within the OSPF area. When configuring
the Sham-link command, the optional parameters are not mutually exclusive. You can
only choose in the undo command those parameters which are selected in the
corresponding sham-link command.
Caution:
The source and destination addresses of a sham link are both Loopback interface
addresses with a 32-bit mask, which must be bound to a VPN instance and imported
into BGP through a direct-connect route.
In an OSPF processes of VPN, the Loopback interface routes used by the
Sham-link cannot be imported directly (so the import direct command cannot be
used in the OSPF processes of VPN). OSPF can only advertise the route by
importing a BGP route.
The source and destination addresses of a sham link cannot be the same.
The same sham link cannot be configured for different OSPF processes.
50 sham links can be configured for an OSPF process at most.
Example
# Configure a Sham-link, with its source address 1.1.1.1 and destination address
2.2.2.2.
[Quidway-ospf-100-area-0.0.0.1] sham-link 1.1.1.1 2.2.2.2 cost 100
2.1.68 summary
Syntax
summary
undo summary
View
VPN-instance subaddress family view
Parameter
None
Description
Use the summary command to enable BGP to perform auto summary to subnet
routes.
Chapter 2 BGP/MPLS VPN Configuration Commands
Huawei Technologies Proprietary
2-57