networking network_error ai_generated partial

ARP: no ARP reply received for 192.168.1.50 on eth0

ID: networking/arp-request-no-reply

Also available as: JSON · Markdown · 中文
80%Fix Rate
84%Confidence
1Evidence
2023-09-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Linux kernel 6.1 active — — —
Windows 11 22H2 active — — —
macOS Ventura 13.4 active — — —

Root Cause

The host sent an ARP request for a target IP address but received no reply, indicating the target is unreachable, powered off, or on a different VLAN/subnet.

generic

中文

主机发送了针对目标IP地址的ARP请求但未收到回复，表明目标不可达、已关机或位于不同的VLAN/子网中。

Official Documentation

https://www.kernel.org/doc/html/latest/networking/arp.html

Workarounds

  1. 90% success Verify target reachability: ping -c 3 192.168.1.50 
    Verify target reachability: ping -c 3 192.168.1.50
  2. 70% success Check ARP table and manually add entry if needed: arp -s 192.168.1.50 00:11:22:33:44:55 
    Check ARP table and manually add entry if needed: arp -s 192.168.1.50 00:11:22:33:44:55

中文步骤

  1. Verify target reachability: ping -c 3 192.168.1.50
  2. Check ARP table and manually add entry if needed: arp -s 192.168.1.50 00:11:22:33:44:55

Dead Ends

Common approaches that don't work:

  1. 85% fail

    Flushing the ARP cache (arp -d 192.168.1.50) without addressing the underlying connectivity issue only temporarily removes the entry.

  2. 90% fail

    Assuming the target is down and rebooting the local machine wastes time if the issue is a VLAN mismatch.