[hcip] routing strategy, strategic routing

Catalog

One 、 Routing strategy

        ACL

         The prefix list

        route-policy

Two 、 Policy routing

         Interface policy routing

         Local policy routing

  3、 ... and 、 Two point bidirectional routing introduction

          Two point two-way experiment

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One 、 Routing strategy

Routing strategy ： Through a series of tools , Add a policy to the routing entry , Realize the control of messages

Routing policy tool

Condition tool ： Used to crawl routes ,ACL、ip-prefix、 Group list 、as-path-filter

Strategy tools ： It is used to perform actions for fetching routes , If you refuse 、 allow ,router-policy

Call tool ： It is used to apply the defined routing policy to a protocol ,filter-policy、import-route

filter-policy  Skippable  router-policy  Call the condition tool directly

        ACL

 ACL  By traffic-filter  By default, it allows all

ACL  By  filter-policy  By default, all are rejected when calling

filter-policy「acl」export： Filter all outgoing interfaces , The routing protocol for link state is invalid .
filter-policy「acl」import：
 Filter all incoming interfaces , For link state protocol , It is to filter the link calculation when it is put into the route , But it doesn't affect LSA flooding 
filter-policy「acl」import/export「 Interface 」： Route filter the characteristic interface 

import-route static： Introducing static routing 
filter-policy「acl」export static： Filter when introducing static routes 

ACL、 The difference between prefix lists

ACL  shortcoming ： Only route prefixes can be fetched , Unable to fetch mask information , If two routes have the same prefix , Unable to achieve accurate filtering

Prefix list advantages ： Skill matching routing prefix information , It can also match the mask information of the route , notes ： The prefix list is not available for traffic filtering

         The prefix list

Default implicitly rejects all ; When do not add  ge  and  le  when , The mask length defaults to the prefix length ; The index number defaults to 10  Increasing

ip ip-prefix「 name 」permit「IP」「IP Prefix length 」ge「 Mask 」le「 Mask 」

        route-policy

Yes ACL  Or the route matching the prefix list ; Reject all by default

Two 、 Policy routing

Policy routing is divided into 「 Interface policy routing 」 and 「 Local interface routing 」

         Interface policy routing

Interface policy routing is controlled by 「 Stream classification 」「 Popular as 」「 Flow strategy 」 form

Stream classification ：traffic classifier, Used to match routes

Popular as ：traffic behavior, Used to specify the actions to be performed by matching routes

Flow strategy ：traffic policy, Used to classify and bind streams

         Local policy routing

  3、 ... and 、 Two point bidirectional routing introduction

          Two point two-way experiment