Bgp Path Selection Configuration - HPE FlexNetwork HSR6800 Configuration Manual

State
Not advertised to any peers yet
The output indicates the following:
Router F can send route information to Router B and Router C through the confederation by establishing
only an EBGP connection with Router A.
Router B and Router D are in the same confederation, but belong to different sub ASs. They obtain
external route information from Router A and generate the same BGP route entries; it seems like that they
reside in the same AS although they have no direct connection in between.

BGP path selection configuration

Network requirements
•
In Figure
Router A and Router C. IBGP runs between Router B and Router D, and between Router D and
Router C.
•
OSPF is the IGP protocol in AS 200.
•
Configure routing policies to make Router D give priority to the route 1.0.0.0/8 learned from
Router C.
Figure 80 Network diagram
GE2/1/1
Device
Router A
Router B
Configuration procedure
Configure IP addresses for interfaces. (Details not shown.)
1.
Configure OSPF on routers B, C, and D:
2.
# Configure Router B.
<RouterB> system-view
[RouterB] ospf
[RouterB-ospf] area 0
[RouterB-ospf-1-area-0.0.0.0] network 192.1.1.0 0.0.0.255
[RouterB-ospf-1-area-0.0.0.0] network 194.1.1.0 0.0.0.255
[RouterB-ospf-1-area-0.0.0.0] quit
[RouterB-ospf-1] quit
: valid, internal, best,
80, all routers run BGP. EBGP runs between Router A and Router B, and between
AS 100
S2/2/0
S2/2/1
Router A
S2/2/1
Interface
GE2/1/1
S2/2/0
S2/2/1
S2/2/0
S2/2/1
AS 200
S2/2/0 S2/2/1
Router B
S2/2/0
S2/2/0
Router C
IP address Device
1.0.0.0/8 Router D
192.1.1.1/24
193.1.1.1/24 Router C
192.1.1.2/24
194.1.1.2/24
255
S2/2/1
Router D
Interface
S2/2/0
S2/2/1
S2/2/0
S2/2/1
IP address
195.1.1.1/24
194.1.1.1/24
195.1.1.2/24
193.1.1.2/24