Dynamic routing --EIGRP

EIGRP

A routing table is formed substantially the steps of:

Neighbor (CDP Layer Protocol) - abutment (Layer Protocol) - Routing Update - topology table - the routing table

 

Feature

It combines the advantages of two kinds of link-state and distance vector routing protocol

 

Unicast or multicast address 240.0.0.10 routing updates

 

Application steps

rip similar (these are basically the use of dynamic routing protocols: open agreement - declared net)

Open and can specify the network, specify the network there are a variety of ways

 

EIGRP table

Neighbor Table

sh ip eigrp neighbors

Topology table

sh ip eigrp topology

Routing Table

sh ip route eigrp

 

FD and AD

FD (feasible distance):

The local router to the destination metric (cost) is the Metric value

AD (Notice distance):

Next-hop router to measure destination

 

Successor and feasible successor

Successor can be understood as the optimal path

FD lowest value

Feasible successor will be appreciated that suboptimal path

FD AD value is less than the value of the successor

 

EIGRP Packets(包)

 

 

EIGRP metric calculation

metric value = 256 (10 ^ 7 / BW (minimum bandwidth) + dly sum / 10)

Note: BW minimum bandwidth

 

In fact, the minimum bandwidth (BW) and load (DLY)

 

Configuring EIGRP test

sh ip route eigrp view eigrp routing table

sh ip protocols see the specific protocol configuration eigrp

sh ip eigrp interfaces view port

sh ip eigrp neighbors see neighbors table

sh ip eigrp topology view the topology table

 

CDP Neighbor Discovery Protocol

show cdp neighbors see neighbors

 

Load Balancing

Cost load balancing: default supports four different different versions of IOS

v * S FD> FS FD rounding

 

Feasible successor FD / successor FD = n (n + 1 if it is an integer, rounding up if the decimal)

 

MD5 Authentication

The method is similar to the rip, you must specify MD5 authentication, or may fail

 

Passive Configuration Interface

Send messages to optimize, to prohibit no need to accept the eigrp

 

Guess you like

Origin www.cnblogs.com/zhuyunlong/p/11937742.html