HCIE Datacom技术分享-ISIS TLV总结-WOLFLAB

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Area address(es) (t=1, l=2)                                    //区域ID

    IP Interface address(es) (t=132, l=4)                     //接口地址

    Protocols Supported (t=129, l=1)                         //NLPID

    Restart Signaling (t=211, l=3)                               //优雅重启动

    Point-to-point Adjacency State (t=240, l=15)      //P2P链路建立邻居描述自己的状态

    Multi Topology (t=229, l=2)                                 //多TOP的支持，双栈ISIS

    LSP entries (t=9, l=32)                                          //CSNP/PSNP一条Lsp的头部信息

    IS Reachability (t=2, l=12)                                    //narrow metric描述TOP信息

    IP Internal reachability (t=128, l=24)                   //narrow metric描述内部路由信息

    IP External reachability (t=130, l=12)                  //narrow metric描述外部路由信息

    IS Neighbor(s) (t=6, l=6)                                     //广播型链路携带对端MAC地址，用于三次握手建立邻居关系

    Padding (t=8, l=255)                                           //填充字段，用于建立邻居检查MTU的

    Extended IP Reachability (t=135, l=25)              //wide metric描述路由信息

    Extended IS reachability (t=22, l=22)                 //wide metric描述TOP信息

    Authentication (t=10, l=5)                                  //认证字段

    24号TLV（IS Alias ID TLV）                                //分片扩展TLV，用来表示初始系统与虚拟系统的关系；

    137号TLV                                                            //主机名映射TLV

    236号TLV（IPv6 Reachability）                          //ST 携带IPV6的路由信息      

    232号TLV（IPv6 Interface Address）                 //携带IPV6的接口地址，hello报文携带link-local地址，LSP报文携带所有启用了isis进程的全球单播地址

    229：MT的标识                                                   

    222：描述IPV6的TOP信息

    235：多拓扑的IPV4可达信息

    237：多拓扑的IPV6可达信息

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