Bgp Path Selection Configuration - HP 3600 v2 series Configuration Manual

Origin
Attribute value : MED 0, localpref 100, pref-val 0, pre 255
State
Not advertised to any peers yet
The output information shows the following:
• Switch F can send route information to Switch B and Switch C through the confederation by
establishing only an eBGP connection with Switch A.
Switch B and Switch D are in the same confederation, but belong to different sub ASs. They obtain
•
external route information from Switch A and generate the same BGP route entries; it seems like they
reside in the same AS although they have no direct connection in between.

BGP path selection configuration

Network requirements
In Figure 96, all switches run BGP. Between Switch A and Switch B, and between Switch A and Switch
C are eBGP connections. Between Switch B and Switch D, and between Switch D and Switch C are iBGP
connections. OSPF is the IGP protocol in AS 200.
Configure routing policies, making Switch D use the route 1.0.0.0/8 from Switch C as the optimal.
Figure 96 Network diagram
Device
Switch A
Switch B
Configuration procedure
Configure IP addresses for interfaces. (Details not shown)
1.
Configure OSPF on Switch B, C, and D.
2.
# Configure Switch B.
<SwitchB> system-view
[SwitchB] ospf
[SwitchB-ospf] area 0
[SwitchB-ospf-1-area-0.0.0.0] network 192.1.1.0 0.0.0.255
[SwitchB-ospf-1-area-0.0.0.0] network 194.1.1.0 0.0.0.255
: igp
: valid, internal, best,
Interface IP address
Vlan-int101 1.0.0.0/8
Vlan-int100 192.1.1.1/24
Vlan-int200 193.1.1.1/24
Vlan-int100 192.1.1.2/24
Vlan-int300 194.1.1.2/24
Device
Switch D
Switch C
249
Interface IP address
Vlan-int400 195.1.1.1/24
Vlan-int300 194.1.1.1/24
Vlan-int400 195.1.1.2/24
Vlan-int200 193.1.1.2/24