CCNP EIGRP

https://github.com/QueenieCplusplus/Static_and_Dynamic (see dynamic routing for private IP)

https://github.com/QueenieCplusplus/Interior_and_Exterior (see interior)

RIP ＆ EIGRP

https://github.com/QueenieCplusplus/RIP

               IP (RIP)                  IP (RIP)
                 IPX                        IPX

                Router    ===========    Router  

                              EIGRP

• Router:

• RIP:

• DUAL, Diffussing Update Algorithm 擴散演算法

The diffusing update algorithm (DUAL) is the algorithm used by Cisco's EIGRP routing protocol to ensure that a given route is recalculated globally whenever it might cause a routing loop. It was developed by J.J. Garcia-Luna-Aceves at SRI International.

當路徑更改時，DUAL 會傳送更動的部分而非整個路由表，當路由器儲存鄰近路徑表，且路徑異動時，路由器可以快速反應（反應時間）。

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• Routing Loop, 路由迴圈

A routing loop is a serious network problem which happens when a data packet is continually routed through the same routers over and over. The data packets continue to be routed within the network in an endless circle.

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• EIGRP has 4 functions:

• build the neighbor table.

• discover routes.

https://github.com/QueenieCplusplus/ND (IPv6)

• choose routes.

• maintain routes.

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• EIGRP has 3 tables per router:

在此網路中，每台路由器都需要維護：

• Routing Table, 路徑表

  表單建立基礎是拓樸表，記錄著到達目的地的最佳路徑稱為 Feasible Successor。

• Neighbor Table, 鄰近表

• Topology Table, 拓樸表

  拓樸表記錄所有目的地的路徑。

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