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【以下的回答经过翻译处理】 您好,
因为您使用基于BGP路由的VPN,请为每个BGP邻居设置不同的本地优先级和不同的AS PATH前置。
本地优先级有助于onprem的CGW选择从本地网络退出的隧道,而在导出路由时添加AS PATH可以使特定路径对接收路由的对等体变得“次要”。
例如)CGW上的AS编号:65270
VPN-ABC Tunnel 1 - Local Preference: 500 | AS PATH : 65270 Tunnel 2 - Local Preference: 400 | AS PATH : 65270 65270
VPN-XYZ Tunnel 3 - Local Preference: 300 | AS PATH : 65270 65270 65270 Tunnel 4 - Local Preference: 200 | AS PATH : 65270 65270 65270 65270
以上配置将使CGW和AWS VPN根据隧道的可用性以以下方式选择路由隧道:
隧道1>隧道2>隧道3>隧道4
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