3com S7906E Manuel De Montage
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BGP Local router ID is 200.1.2.1
Status codes: * - valid, > - best, d - damped,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
i 1.0.0.0 193.1.1.2 0 100 0 100i
Switch D learned route 1.0.0.0/8 from Switch C.
BGP Confederation Configuration
Network requirements
As shown in the following figure, to reduce iBGP connections in AS 200, split it into three sub-ASs,
AS65001, AS65002 and AS65003. Switches in AS65001 are fully meshed.
Figure 1-25 Network diagram for BGP confederation configuration
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
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 (omitted)
2) Configure BGP confederation
# Configure Switch A.
<SwitchA> system-view
[SwitchA] bgp 65001
[SwitchA-bgp] router-id 1.1.1.1
[SwitchA-bgp] confederation id 200
[SwitchA-bgp] confederation peer-as 65002 65003
[SwitchA-bgp] peer 10.1.1.2 as-number 65002
[SwitchA-bgp] peer 10.1.1.2 next-hop-local