•
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 load balancing on Switch A.
Configuration procedure
1.
Configure IP addresses for interfaces. (Details not shown.)
2.
Configure BGP connections:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] bgp 65008
[SwitchA-bgp-default] router-id 1.1.1.1
[SwitchA-bgp-default] peer 3.1.1.1 as-number 65009
[SwitchA-bgp-default] peer 3.1.2.1 as-number 65009
[SwitchA-bgp-default] address-family ipv4 unicast
[SwitchA-bgp-default-ipv4] peer 3.1.1.1 enable
[SwitchA-bgp-default-ipv4] peer 3.1.2.1 enable
[SwitchA-bgp-default-ipv4] network 8.1.1.0 24
[SwitchA-bgp-default-ipv4] quit
[SwitchA-bgp-default] quit
# Configure Switch B.
<SwitchB> system-view
[SwitchB] bgp 65009
[SwitchB-bgp-default] router-id 2.2.2.2
[SwitchB-bgp-default] peer 3.1.1.2 as-number 65008
[SwitchB-bgp-default] peer 3.3.3.3 as-number 65009
[SwitchB-bgp-default] peer 3.3.3.3 connect-interface loopback 0
[SwitchB-bgp-default] address-family ipv4 unicast
[SwitchB-bgp-default-ipv4] peer 3.1.1.2 enable
[SwitchB-bgp-default-ipv4] peer 3.3.3.3 enable
[SwitchB-bgp-default-ipv4] network 9.1.1.0 24
[SwitchB-bgp-default-ipv4] quit
[SwitchB-bgp-default] quit
[SwitchB] ip route-static 3.3.3.3 32 9.1.1.2
# Configure Switch C.
<SwitchC> system-view
[SwitchC] bgp 65009
[SwitchC-bgp-default] router-id 3.3.3.3
[SwitchC-bgp-default] peer 3.1.2.2 as-number 65008
[SwitchC-bgp-default] peer 2.2.2.2 as-number 65009
[SwitchC-bgp-default] peer 2.2.2.2 connect-interface loopback 0
[SwitchC-bgp-default] address-family ipv4 unicast
[SwitchC-bgp-default-ipv4] peer 3.1.2.2 enable
[SwitchC-bgp-default-ipv4] peer 2.2.2.2 enable
[SwitchC-bgp-default-ipv4] network 9.1.1.0 24
[SwitchC-bgp-default-ipv4] quit
[SwitchC-bgp-default] quit
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