Netgear M5300-28G-POE+ (GSM7228PSv1h2) - 12-Port Managed Gigabit Switch Ratgeber Für Administratoren

iBGP is an internal BGP connection between peers in the same AS. Because AS_PATH does 
not change in the same AS, iBGP cannot prevent loops as EBGP does. To protect against 
loops between iBGPs, iBGP does not advertise the routes learned from an iBGP peer to 
another iBGP peer, which is why iBGP must be fully meshed.

This example shows how to configure iBGP in the AS100 switch. Switches A, B, and C are all 
in the same AS100 switch and connected to each other. Each switch has various subnets 
configured in multiple VLANs.

IBPG

AS100

AS200

IBPG

A

B

C

D

E

1/0/2

192.168.3.1/24

1/0/3

192.168.3.2/24

1/0/1

192.168.2.2/24

1/0/2

192.168.2.1/24

1/0/2

192.168.1.1

1/0/1

192.168.1.2

1/0/1

172.126.1.1/24

1/0/1

172.126.1.2/24

1/0/1

172.126.2.2/24

172.126.2.2/24