342
[SwitchD-ospf-1-area-0.0.0.0] quit
[SwitchD-ospf-1] quit
3. Configure BGP connections:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] bgp 100
[SwitchA-bgp-default] peer 192.1.1.2 as-number 200
[SwitchA-bgp-default] peer 193.1.1.2 as-number 200
[SwitchA-bgp-default] address-family ipv4 unicast
[SwitchA-bgp-default-ipv4] peer 192.1.1.2 enable
[SwitchA-bgp-default-ipv4] peer 193.1.1.2 enable
# Inject network 1.0.0.0/8 to the BGP routing table on Switch A.
[SwitchA-bgp-default-ipv4] network 1.0.0.0 8
[SwitchA-bgp-default-ipv4] quit
[SwitchA-bgp-default] quit
# Configure Switch B.
[SwitchB] bgp 200
[SwitchB-bgp-default] peer 192.1.1.1 as-number 100
[SwitchB-bgp-default] peer 194.1.1.1 as-number 200
[SwitchB-bgp-default] address-family ipv4 unicast
[SwitchB-bgp-default-ipv4] peer 192.1.1.1 enable
[SwitchB-bgp-default-ipv4] peer 194.1.1.1 enable
[SwitchB-bgp-default-ipv4] quit
[SwitchB-bgp-default] quit
# Configure Switch C.
[SwitchC] bgp 200
[SwitchC-bgp-default] peer 193.1.1.1 as-number 100
[SwitchC-bgp-default] peer 195.1.1.1 as-number 200
[SwitchC-bgp-default] address-family ipv4 unicast
[SwitchC-bgp-default-ipv4] peer 193.1.1.1 enable
[SwitchC-bgp-default-ipv4] peer 195.1.1.1 enable
[SwitchC-bgp-default-ipv4] quit
[SwitchC-bgp-default] quit
# Configure Switch D.
[SwitchD] bgp 200
[SwitchD-bgp-default] peer 194.1.1.2 as-number 200
[SwitchD-bgp-default] peer 195.1.1.2 as-number 200
[SwitchD-bgp-default] address-family ipv4 unicast
[SwitchD-bgp-default-ipv4] peer 194.1.1.2 enable
[SwitchD-bgp-default-ipv4] peer 195.1.1.2 enable
[SwitchD-bgp-default-ipv4] quit
[SwitchD-bgp-default] quit
4. Configure local preference for route 1.0.0.0/8, making Switch D give priority to the route learned
from Switch C:
# Define IPv4 basic ACL 2000 on Switch C to permit route 1.0.0.0/8.
[SwitchC] acl basic 2000
[SwitchC-acl-ipv4-basic-2000] rule permit source 1.0.0.0 0.255.255.255
[SwitchC-acl-ipv4-basic-2000] quit
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