H3C_ Using setting default static routing priority to realize the active and standby function of export dual lines

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Preface

In the deployment of double line exits , We usually use policy routing or static routing priority to realize line backup or load sharing . This case will describe the use of static （ default ） Routing priority realizes the active and standby functions of dual lines , The advantage of this method is that the configuration is relatively simple , But the disadvantage is that the load sharing of dual lines cannot be realized .

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One 、 Topology diagram and topology description

Topology

Topology description
In the campus network , Pulled two Internet lines , One of them is a telecommunication line , One is a connecting line . Telecommunication line is the main line , All within the campus network PC Access to Internet and Internet via this line ; Unicom line is a standby line , When the telecommunication line fails , Intranet PC Accessing the external network will automatically switch to the Unicom line .
ISP- Telecom routers and ISP- Unicom routers are interconnected in the external network area , There is a server connected to each of the two lines , Server1 And ISP- Telecommunication connection ,Server2 And ISP- Connect with Unicom .
Relevant equipment interfaces IP And the Internet IP See the topology .

Two 、 Configuration steps

SW、PC Internet and Internet Server Relevant configurations of are omitted .

RT To configure
Interface IP To configure