{
  "id": "networking/dhcp-request-timeout",
  "signature": "DHCPREQUEST timed out on interface eth0, waiting for DHCPOFFER",
  "signature_zh": "接口eth0上的DHCPREQUEST超时，正在等待DHCPOFFER",
  "regex": "DHCPREQUEST timed out on interface \\w+, waiting for DHCPOFFER",
  "domain": "networking",
  "category": "network_error",
  "subcategory": null,
  "root_cause": "The DHCP client sent a DHCPREQUEST but did not receive a DHCPACK from the server within the timeout period, often due to server unavailability, network congestion, or VLAN misconfiguration.",
  "root_cause_type": "generic",
  "root_cause_zh": "DHCP客户端发送了DHCPREQUEST，但在超时时间内未收到服务器的DHCPACK，通常是由于服务器不可用、网络拥塞或VLAN配置错误所致。",
  "versions": [
    {
      "version": "isc-dhcp-client 4.4.3",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "dhcpcd 9.4.1",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "NetworkManager 1.42",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Increasing the DHCP timeout on the client only masks the problem if the server is unreachable due to firewall rules blocking UDP port 67/68.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Restarting the network service repeatedly without checking the DHCP server logs can cause unnecessary downtime.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Check DHCP server connectivity: tcpdump -i eth0 port 67 or port 68 -vvv",
      "success_rate": 0.9,
      "how": "Check DHCP server connectivity: tcpdump -i eth0 port 67 or port 68 -vvv",
      "condition": "",
      "sources": []
    },
    {
      "action": "Assign a static IP as a temporary fix: ifconfig eth0 192.168.1.10 netmask 255.255.255.0 up",
      "success_rate": 0.95,
      "how": "Assign a static IP as a temporary fix: ifconfig eth0 192.168.1.10 netmask 255.255.255.0 up",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "Check DHCP server connectivity: tcpdump -i eth0 port 67 or port 68 -vvv",
    "Assign a static IP as a temporary fix: ifconfig eth0 192.168.1.10 netmask 255.255.255.0 up"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.isc.org/dhcp/",
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.83,
  "fix_success_rate": 0.8,
  "resolvable": "partial",
  "first_seen": "2024-01-10",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}