networking network_error ai_generated true

从10.0.0.1收到发往192.168.1.100的ICMP重定向

ICMP redirect received from 10.0.0.1 for destination 192.168.1.100

ID: networking/icmp-redirect-received

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85%修复率
82%置信度
1证据数
2023-11-20首次发现

版本兼容性

版本状态引入弃用备注
Linux kernel 6.1 active — — —
FreeBSD 13.2 active — — —
Cisco IOS 15.9 active — — —

根因分析

路由器发送了ICMP重定向消息，表明存在通往目的地的更优路由，通常是由于路由配置欠佳或非对称路由路径所致。

English

A router sent an ICMP redirect message indicating a better route exists for a destination, often due to suboptimal routing configuration or asymmetric routing paths.

generic

官方文档

https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt

解决方案

  1. Accept the redirect and update routing table: route add -net 192.168.1.0/24 gw 10.0.0.2 dev eth0
  2. Disable redirects only on the specific interface: sysctl -w net.ipv4.conf.eth0.accept_redirects=0

无效尝试

常见但无效的做法:

  1. 75% 失败

    Disabling ICMP redirect processing globally (net.ipv4.conf.all.accept_redirects=0) may break legitimate routing updates and cause packet loss.

  2. 80% 失败

    Ignoring the redirect without updating routing tables can lead to persistent suboptimal paths and increased latency.