2-9
After the preceding configurations are completed, when ARP packets arrive at interfaces
GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2, their MAC and IP addresses are checked, and then
the packets are checked against the IP-to-MAC binding and finally DHCP snooping entries.
ARP Detection Configuration Example II
Network requirements
As shown in Figure 2-3, enable 802.1X on Switch A. Enable ARP detection for VLAN 10 to allow only
packets from valid clients to pass. Configure Host A and Host B as local 802.1X access users.
Figure 2-3 Network diagram for ARP detection configuration
Configuration procedure
1) Add all the ports on Switch A into VLAN 10 (the configuration procedure is omitted).
2) Configure DHCP server (the configuration procedure is omitted).
3) Configure Host A and Host B as 802.1X clients (the configuration procedure is omitted) and
configure them to upload IP addresses for ARP detection.
4) Configure Switch A
# Enable the 802.1X function.
<SwitchA> system-view
[SwitchA] dot1x
[SwitchA] interface GigabitEthernet 1/0/1
[SwitchA-GigabitEthernet1/0/1] dot1x
[SwitchA-GigabitEthernet1/0/1] quit
[SwitchA] interface GigabitEthernet 1/0/2
[SwitchA-GigabitEthernet1/0/2] dot1x
[SwitchA-GigabitEthernet1/0/2] quit
# Add local access user test.
[SwitchA] local-user test
[SwitchA-luser-test] service-type lan-access
[SwitchA-luser-test] password simple test
[SwitchA-luser-test] quit
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