gre的keeplive

GRE的Keepalive是一种功能，用于检测GRE隧道的状态。通过周期性地向对端发送keepalive报文，本端可以判断对端是否可达。如果对端不可达，本端的Tunnel接口状态会被置为Down，以避免数据黑洞的发生。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [GRE-防火墙与路由实现](https://blog.csdn.net/baidu_41701694/article/details/126754898)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [GRE隧道KEEPALIVE](https://blog.csdn.net/weixin_34363171/article/details/92575396)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
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