Overview of common routing protocols and routing protocol classification


We are in the routing of data communication in a very important step. This paper introduces a common routing protocol.And we will write a detailed explanation of some articles for major routing protocols in the coming days. Such as OSPF, IS-IS, BGP protocol


In the process of network communications, it is a very important part of the route, and a method for routing protocols can also be divided into more of:

routing Explanation
Static Routing It requires the administrator to manually configure and maintain the routing table
Dynamic Routing It can automatically create their own routing table, and can be adjusted in a timely manner in accordance with the actual situations change

Static Routing

Advantages and Disadvantages

Advantage Disadvantaged
Simple configuration Require manual configuration, maintenance, heavy workload
No CPU resources It does not automatically adapt to topology changes
Load Balancing
Route Backup


Static Routing Configuration
Commandsip route-static [目的网段] [子网掩码] [下一跳IP地址]

FIG router R2 above example:

[r2]int e0/0/0
[r2-Ethernet0/0/0]ip add 24
[r2-Ethernet0/0/0]int e0/0/1
[r2-Ethernet0/0/1]ip add 24
[r2]ip route-static 24
[r2]ip route-static 24

Dynamic Routing

And there are a lot of dynamic routing protocol routing, common are:

RIP (Routing Information Protocol): Routing Information Protocol
OSPF (Open Shortest Path First): Open Shortest Path First Protocol
IS-IS (Intermediate System-to -Intermediate System): Intermediate System to Intermediate System Routing Protocol
BGP (Border Gateway Protocol) : border gateway protocol

We can classify routes according to some definitions:

By routing algorithm classification

classification Routing Protocol
Distance vector routing protocol RIP, BGP, etc.
Link-state routing protocol OSPF、IS-IS等

By work area classification

classification Routing Protocol
Intra-domain routing protocols (Interior Gateway Protocol, IGP) RIP、OSPF、IS-IS等
Inter-domain routing protocol (Exterior Gateway Protocol, EGP) EGP、BGP

By routing type classification

classification Routing Protocol
Unicast routing protocol RIP、OSPF、IS-IS、IGRP、BGP等
Multicast Routing Protocol DVMRP, PIM-SM, PIM-DM, MOSPF, MBGP 等

RIP Profile

It is a protocol based on RIP distance vector (Distance-Vector) algorithm, using the hop count as a measure to measure the distance to the destination host.

  • Pros: Simple to configure, easy to maintain, suitable for small networks
  • Disadvantages: slow convergence, easy to produce loops (slow convergence leads), differential extensibility (16 hops), does not support VLSM, CIDR (VLSM classless inter domain routing), does not support authentication functionality

RIP Configuration

[Huawei]rip  //开启RIP协议
[Huawei-rip-1]version 2  //选择版本2
[Huawei-rip-1]network  //宣告相邻网段
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Origin blog.csdn.net/qq_46254436/article/details/104839974