275
s - suppressed, S - stale, i - internal, e - external
Origin: i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
* >i 20.0.0.0 193.1.1.2 0 100 0 100i
The output shows that Switch D has learned route 20.0.0.0/8 from Switch C.
BGP confederation configuration example
Network requirements
As shown in Figure 69, split AS 200 into three sub-ASs (AS 65001, AS 65002, and AS 65003) to
reduce IBGP connections. Switches in AS65001 are fully meshed.
Figure 69 Network diagram
Table 15 Interface and IP address assignment
Device Interface IP address Device Interface IP address
Switch A Vlan-int100 200.1.1.1/24 Switch D Vlan-int200 10.1.5.1/24
Vlan-int200 10.1.1.1/24 Vlan-int400 10.1.3.2/24
Vlan-int300 10.1.2.1/24 Switch E Vlan-int200 10.1.5.2/24
Vlan-int400 10.1.3.1/24 Vlan-int500 10.1.4.2/24
Vlan-int500 10.1.4.1/24 Switch F Vlan-int100 200.1.1.2/24
Switch B Vlan-int200 10.1.1.2/24 Vlan-int600 9.1.1.1/24
Switch C Vlan-int300 10.1.2.2/24
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Configure BGP confederation:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] bgp 65001
[SwitchA-bgp] router-id 1.1.1.1
Switch F
Switch A
Switch D
Switch E
AS 200
AS 100
Vlan-int600
Switch B
Switch C
AS 65002
AS 65003
Vlan-int100
Vlan-int100
AS 65001
Vl
an
-int300
Vlan-int400
Vlan-int500
Vlan-int400
Vlan-int500
Vlan-int200
Vlan-int200
Vlan-int300
Vlan-int200
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