ARP告警

[zxb]

交换机log日志报ARP-4-NULL_SRC_MAC: NULL MAC address from 172.23.10.135 on Vl10，什么情况会出现这种现象

[ammahend]

can be several reasons

• faulty NIC
• bad driver
• faulty VM
• When a device is booting up, initializing its network stack, or resetting its NIC, it may generate ARP packets with incomplete information, such as a NULL source MAC address, before its networking subsystem is fully initialized
• multiple devices attempt to use the same IP address etc
• bug

so a show ip arp, show mac address-table | include 172.23.10.135 and trace the switch port.