{
  "id": "networking/ethernet-jumbo-frame-dropped",
  "signature": "eth0: jumbo frame dropped, MTU 1500 but frame size 9000 received from 00:1a:2b:3c:4d:5e",
  "signature_zh": "eth0：巨帧被丢弃，MTU为1500但收到来自00:1a:2b:3c:4d:5e的帧大小为9000",
  "regex": "\\S+: jumbo frame dropped, MTU \\d+ but frame size \\d+ received from \\S+",
  "domain": "networking",
  "category": "network_error",
  "subcategory": null,
  "root_cause": "A network interface configured with a standard 1500-byte MTU received an Ethernet frame larger than the MTU (a jumbo frame), typically from a peer that has jumbo frames enabled, causing the kernel to drop the frame due to size mismatch.",
  "root_cause_type": "generic",
  "root_cause_zh": "配置为标准1500字节MTU的网络接口接收到了大于MTU的以太网帧（巨帧），通常来自启用了巨帧的对端，导致内核因大小不匹配而丢弃该帧。",
  "versions": [
    {
      "version": "Linux kernel 5.15",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "Linux kernel 6.6",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "FreeBSD 13.2",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "Setting the MTU on eth0 to 9000 to accept jumbo frames.",
      "why_fails": "This may cause fragmentation issues if the path has other devices with lower MTU; also, it changes the interface's behavior for all traffic, not just the problematic peer.",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "Using an access control list to block large frames from the sender.",
      "why_fails": "Does not solve the root cause; the sender still sends jumbo frames, and blocking them drops legitimate traffic.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "On the sender: ifconfig eth0 mtu 1500",
      "success_rate": 0.9,
      "how": "On the sender: ifconfig eth0 mtu 1500",
      "condition": "",
      "sources": []
    },
    {
      "action": "ip link set dev eth0 mtu 9000",
      "success_rate": 0.85,
      "how": "ip link set dev eth0 mtu 9000",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "On the sender: ifconfig eth0 mtu 1500",
    "ip link set dev eth0 mtu 9000"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.kernel.org/doc/Documentation/networking/jumbo-frames.txt",
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.83,
  "fix_success_rate": 0.88,
  "resolvable": "true",
  "first_seen": "2024-01-30",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}