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.

[Rps-Cheers]

HI，可以参考如下官方的解释：

%ARP-4-NULL_SRC_MAC : NULL MAC address from [IP_address] on [chars]

Explanation Application or peer tried to insert entry with NULL SRC MAC

Recommended Action If this message recurs, call your technical support representative for assistance.

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/16_xe/smg/ent-rout-smg.html