3com S7906E Manuel De Montage

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Figure 1-22 Network diagram for BGP load balancing configuration (on switches)

Configuration procedure

1) Configure IP addresses for interfaces (omitted)

2) Configure BGP connections

On Switch A, establish eBGP connections with Switch B and Switch C respectively; configure BGP

to advertise network 8.1.1.0/24 to Switch B and Switch C, so that Switch B and Switch C can

access the internal network connected to Switch A.

On Switch B, establish an eBGP connection with Switch A and an iBGP connection with Switch C;

configure BGP to advertise network 9.1.1.0/24 to Switch A, so that Switch A can access the

intranet through Switch B; configure a static route to interface loopback 0 on Switch C (or use a

routing protocol like OSPF) to establish the iBGP connection.

On Switch C, establish an eBGP connection with Switch A and an iBGP connection with Switch B;

configure BGP to advertise network 9.1.1.0/24 to Switch A, so that Switch A can access the

intranet through Switch C; configure a static route to interface loopback 0 on Switch B (or use

another protocol like OSPF) to establish the iBGP connection.

# Configure Switch A.

<SwitchA> system-view

[SwitchA] bgp 65008

[SwitchA-bgp] router-id 1.1.1.1

[SwitchA-bgp] peer 3.1.1.1 as-number 65009

[SwitchA-bgp] peer 3.1.2.1 as-number 65009

[SwitchA-bgp] network 8.1.1.1 24

[SwitchA-bgp] quit

# Configure Switch B.

<SwitchB> system-view

[SwitchB] bgp 65009

[SwitchB-bgp] router-id 2.2.2.2

[SwitchB-bgp] peer 3.1.1.2 as-number 65008

[SwitchB-bgp] peer 3.3.3.3 as-number 65009

[SwitchB-bgp] peer 3.3.3.3 connect-interface loopback 0

[SwitchB-bgp] network 9.1.1.0 255.255.255.0

[SwitchB-bgp] quit

[SwitchB] ip route-static 3.3.3.3 32 9.1.1.2