OSPF：路由器192.168.1.1的LSA年龄达到3600秒，10.0.0.0/24，正在刷新
OSPF: LSA age 3600 seconds reached for 10.0.0.0/24, router 192.168.1.1, flushing
ID: networking/ospf-lsa-aging
版本兼容性
| 版本 | 状态 | 引入 | 弃用 | 备注 |
|---|---|---|---|---|
| Cisco IOS XE 17.12.1 | active | — | — | — |
| Juniper Junos 22.3R1 | active | — | — | — |
| FRRouting 9.1 | active | — | — | — |
| Quagga 1.2.4 | active | — | — | — |
根因分析
OSPF链路状态通告（LSA）已达到最大年龄（MaxAge）3600秒，导致原始路由器将其从链路状态数据库中刷新，可能是由于接口抖动或路由器在没有发送正确LSUpdate的情况下宕机。
English
An OSPF Link State Advertisement (LSA) has reached its maximum age (MaxAge) of 3600 seconds, causing the originating router to flush it from the link-state database, potentially due to a flapping interface or a router that has gone down without sending a proper LSUpdate.
官方文档
https://www.rfc-editor.org/rfc/rfc2328解决方案
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Check the interface stability on the originating router: `show ip ospf interface` and look for flapping counters; if found, replace faulty hardware or reconfigure interface parameters.
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Force the router to re-advertise the LSA by clearing the specific OSPF neighbor: `clear ip ospf neighbor 192.168.1.1`
无效尝试
常见但无效的做法:
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100% 失败
The MaxAge is fixed at 3600 seconds per OSPF standard; cannot be changed without violating RFC compliance.
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85% 失败
This disrupts all OSPF adjacencies and causes network-wide route flapping, making the problem worse.
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90% 失败
Static routes are not propagated via OSPF LSAs and will not fix the aging issue; they may also cause routing loops.