3Com Switch 4800G 24-Port Configuration Manual page 407

BGP Confederation
Configuration
1 Configure IP addresses for interfaces (omitted)
2 Configure BGP confederation
Network NextHop
*> 1.0.0.0 192.1.1.1
# Display the BGP routing table on Switch D.
[SwitchD] display bgp routing-table
Total Number of Routes: 1
BGP Local router ID is 4.4.4.4
Status codes: * - valid, > - best, d - damped,
h - history,
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop
i 1.0.0.0 193.1.1.2
Switch D learned route 1.0.0.0/8 from Switch C.
Network requirements
To reduce IBGP connections in AS 200, split it into three sub-ASs, AS77001,
AS77002 and AS77003. Switches in AS77001 are fully meshed.
Network diagram
Figure 135 Network diagram for BGP confederation configuration
Switch F
Vlan-int200
Vlan- int200
Vlan- int100
AS 100
Vlan -int100
Switch A
AS 200
Device Interface
Switch A Vlan-int100
Vlan-int200
Vlan-int300
Vlan-int400
Vlan-int500
Switch B Vlan-int200
Switch C Vlan-int300
Configuration procedure
MED
0
i - internal, s - suppressed, S - Stale
MED
0
Switch C
Switch B
Vlan -int300
AS 65002
AS 65003
Switch D
Vlan- int400
Vlan -int400
Vlan -int500
AS 65001
Vlan- int200
Vlan-int500
Switch E
IP address Device
200.1.1.1/24 Switch D
10.1.1.1/24
10.1.2.1/24 Switch E
10.1.3.1/24
10.1.4.1/24 Switch F
10.1.1.2/24
10.1.2.2/24
BGP Configuration Examples
LocPrf PrefVal Path/Ogn
0 100i
LocPrf PrefVal Path/Ogn
100 0 100i
Vlan -int200
Interface IP address
Vlan-int400 10.1.3.2/24
Vlan-int200 10.1.5.1/24
Vlan-int500 10.1.4.2/24
Vlan-int200 10.1.5.2/24
Vlan-int200 9.1.1.1/24
Vlan-int100 200.1.1.2/24
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