在GRE Tunnel接口视图下，配置隧道封装模式为GRE的完整命令为（）。A、tunnel protocol greB、tunnel greC、tunnel-protocol greD、protocol gre
在GRE Tunnel接口视图下，配置隧道封装模式为GRE的完整命令为（）。
- A、tunnel protocol gre
- B、tunnel gre
- C、tunnel-protocol gre
- D、protocol gre
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