networking protocol_error ai_generated partial

PPPoE：LCP回显超时，未收到对端192.168.100.1的响应

PPPoE: LCP echo timeout, no response from peer 192.168.100.1

ID: networking/pppoe-lcp-echo-timeout

其他格式: JSON · Markdown 中文 · English
72%修复率
82%置信度
1证据数
2023-11-08首次发现

版本兼容性

版本状态引入弃用备注
pppd 2.4.9 active — — —
pppd 2.5.1 active — — —
Linux kernel 5.10 active — — —

根因分析

PPPoE会话的链路控制协议（LCP）回显请求未得到远程对端的确认，通常是由于接入集中器失效、DSL调制解调器故障或PPPoE服务器静默断开会话。

English

The PPPoE session's Link Control Protocol (LCP) echo requests are not being acknowledged by the remote peer, typically due to a dead access concentrator, a faulty DSL modem, or a misconfigured PPPoE server that has dropped the session silently.

generic

官方文档

https://ppp.samba.org/pppd.html

解决方案

  1. killall pppd && pon dsl-provider
  2. reboot modem via web interface or power cycle; then restart pppd: ifdown ppp0 && ifup ppp0

无效尝试

常见但无效的做法:

  1. Setting lcp-echo-interval to a larger value (e.g., 60 seconds) to reduce timeout frequency. 80% 失败

    This only delays the inevitable disconnection; the underlying peer unresponsiveness remains, and sessions still drop after the longer timeout.

  2. Adding 'noecho' option to pppd to stop sending LCP echo requests. 95% 失败

    Hides the failure but leaves the session in a broken state; the PPPoE connection may appear up but cannot pass traffic.