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2006-05-25
华为技术有限公司
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2006-05-25
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GRE ቤተ መጻሕፍቲ ባይዱ道技术简介和应用
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Revision Record 修订记录
Date 日期
2006-05-25
Revision Version
1. 隧道技术.............................................................................................................................6 2. 隧道协议分类.....................................................................................................................6 三、GRE简介.....................................................................................................................................7 四、GRE的封装过程.........................................................................................................................7 1. 乘客协议.............................................................................................................................8 2. 封装协议.............................................................................................................................8 3. 运输协议.............................................................................................................................9 4. GRE的封装过程...................................................................................................................9 五、GRE报文头部格式...................................................................................................................10 1. RFC1701 定义的GRE报文头部..........................................................................................10 2. RFC2784 定义的GRE报文头部..........................................................................................12 3. 其它厂家规定的GRE报文头部.........................................................................................12 六、普通GRE隧道配置...................................................................................................................13 1. 创建Tunnel接口...............................................................................................................13 2. 激活Tunnel接口...............................................................................................................13 3. 配置Tunnel接口的网络地址...........................................................................................13 4. 配置Tunnel接口的源端地址和目的端地址 ...................................................................14 5. 配置GRE的安全选项.........................................................................................................14 6. 配置Tunnel的路由...........................................................................................................14 七、GRE应用和分析.......................................................................................................................15 1. 私网穿越公网的GRE隧道应用.........................................................................................15 2. PDSN的A10 链路GRE隧道分析..........................................................................................17 3. WAPGW的GRE隧道分析.......................................................................................................21 八、后记.........................................................................................................................................23 九、附录.........................................................................................................................................23 1. GRE正式RFC文档...............................................................................................................23
修订 版本
1.00
Sec No. 修改 章节
Change Description 修改描述
初稿完成
Author 作者
王逸彬/41478
2006-05-25
华为机密，未经许可不得扩散
第 2 页, 共 23 页
GRE 隧道技术简介和应用
文档密级：内部公开
Catalog 目录
一、概述...........................................................................................................................................6 二、VPN简介.....................................................................................................................................6
2006-05-25
华为机密，未经许可不得扩散
第 3 页, 共 23 页
GRE 隧道技术简介和应用
文档密级：内部公开
Figure List 图目录
图 1 GRE 协议栈...........................................................................................................................7 图 2 GRE 的封装过程...................................................................................................................9 图 3 RFC1701 定义的 GRE 报文头部格式 ...............................................................................10 图 4 RFC2784 定义的 GRE 报文头部格式 ...............................................................................12 图 5 私网穿越公网的 GRE 隧道................................................................................................15 图 6 PDSN 简单 IP 业务组网模型 .............................................................................................17 图 7 RP 接口协议栈....................................................................................................................17 图 8 RP 接口 GRE 隧道报文分析..............................................................................................18 图 9 封装 PPP 帧的 GRE 报文头部格式 ...................................................................................18 图 10 IPGW 和 WING3528-1 之间的 GRE 隧道分析 ..............................................................21 图 11 IPGW 的 GRE 隧道报文分析...........................................................................................22