H3C LS-5100-16P-SI-OVS-H3 Configuration page 155

Routing
H3C Low-End Ethernet Switches Configuration Examples
Figure 3-1 Network diagram
III. Configuration plan
Run BGP in AS 100 to interconnect with AS 200, AS 300, and AS 400. Use the
MED attribute to control the forwarding path.
Run OSPF in AS 200. The device in AS 200 connecting to AS 100 runs both OSPF
and BGP. Use static routes as backup routes to implement link redundancy and
improve network reliability. Apply a routing policy when redistributing BGP routes
for filtering.
Run OSPF in AS 400. The device in AS 400 connecting to AS 100 runs both OSPF
and BGP. Apply a routing policy when redistributing BGP routes for filtering.
Run RIPv2 in AS 300. The device in AS 300 connecting to AS 100 runs both RIPv2
and BGP. Apply a routing policy when redistributing BGP routes for filtering.
AS 300 users use the combination of static routes, RIP, and routing policy to
access the ISP.
Interaction between IGP and BGP is involved in the configuration. Since the
default BGP preference is 256, when backup routes exist in the routing table, you
need to modify the BGP preference in order to select the primary route as
required.
Chapter 3 Comprehensive Configuration
3-2
Example