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Routers have several route selection approaches, each based on a set of rules, policies, or conditions. In which of the following approaches does the

Created: Dec 10, 2021 12:30:19Latest reply: Dec 11, 2021 14:06:50 232 7 0 0 0
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Routers have several route selection approaches, each based on a set of rules, policies, or conditions. In which of the following approaches does the system automatically add deny all' to the end of such rules, policies, or conditions? (multiple choice)

  1. ACL

  2. IP-prefix

  3. route-policy

  4. community-filter

Featured Answers
Diego.Silva
MVE Author Created Dec 10, 2021 13:36:35

Hi, simon.waweru!

The answer is ABCD


By default, Community filters work in deny mode. If all matching rules in a filter are configured to work in deny mode, all routes are denied by the filter; to prevent this problem, configure one matching rule in permit mode after one or multiple matching rules in deny mode so that the routes except for those denied by preceding matching rules are permitted by the filter.

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Recommended answer

fuzi_yao
Admin Created Dec 10, 2021 12:59:59

Hi, simon.waweru!

The answer is ABCD

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All Answers
Hi, friend!
Please wait a moment. The engineer will reply later.
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Hi, simon.waweru!

The answer is ABCD

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Posted by fuzi_yao at 2021-12-10 12:59 Hi, simon.waweru!The answer is AB
Why option B and not C?
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fuzi_yao
fuzi_yao Created Dec 10, 2021 13:37:30 (0) (0)
Hi, friend!
I have searched the information about the routing policy and found no description of the default action. Now I have found the information as follows:
By default, all unmatched routes on Huawei S series switches are rejected by the route-policy.
The default action of the IP address prefix is deny. The description is as follows:
The rules for filtering routes by an IP prefix list are as follows: sequential matching, unique matching, and default denying.  
fuzi_yao
fuzi_yao Created Dec 10, 2021 13:38:42 (0) (0)
Hi, friend!
The default behavior of a community filter is deny. That is, if a route is not permitted in a certain filtering, the route cannot pass the filter.  
Diego.Silva
Diego.Silva MVE Author Created Dec 10, 2021 13:36:35

Hi, simon.waweru!

The answer is ABCD


By default, Community filters work in deny mode. If all matching rules in a filter are configured to work in deny mode, all routes are denied by the filter; to prevent this problem, configure one matching rule in permit mode after one or multiple matching rules in deny mode so that the routes except for those denied by preceding matching rules are permitted by the filter.

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GOOD ANSWER
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