Juniper Networks Certified Internet Specialist (JNCIS) - JN0-360 Exam: Resolving BGP Configuration Issue

Resolving BGP Configuration Issue

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Question

-- Exhibit --

user@R1> show route protocol bgp

inet.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)

+ = Active Route, - = Last Active, * = Both

200.200.0.0/24 *[BGP/170] 00:00:47, localpref 100

AS path: 65001 I -

> to 192.168.100.1 via ge-1/1/5.435

200.200.1.0/24 *[BGP/170] 00:00:47, localpref 100

AS path: 65001 I -

> to 192.168.100.1 via ge-1/1/5.435

200.200.2.0/24 *[BGP/170] 00:00:47, localpref 100

AS path: 65001 I -

> to 192.168.100.1 via ge-1/1/5.435

200.200.3.0/24 *[BGP/170] 00:00:47, localpref 100

AS path: 65001 I -

> to 192.168.100.1 via ge-1/1/5.435

user@R2> show route 200.200/16

inet.0: 36 destinations, 36 routes (36 active, 0 holddown, 0 hidden)

Restart Complete -

+ = Active Route, - = Last Active, * = Both

200.200.0.0/24 *[Static/5] 00:09:12

Reject -

200.200.1.0/24 *[Static/5] 00:09:12

Reject -

200.200.2.0/24 *[Static/5] 00:09:12

Reject -

200.200.3.0/24 *[Static/5] 00:09:12

Reject -

200.200.4.0/24 *[Static/5] 00:09:12

Reject -

user@R2> show configuration protocols bgp

export export-200;

group c5 {

neighbor 192.168.100.2 {

export export-200.200;

peer-as 65002;

}

}

user@R2> show configuration policy-options policy-statement export-200.200 term 1 { from { route-filter 200.200.0.0/22 longer;

}

then accept;

}

user@R2> show configuration policy-options policy-statement export-200 term 1 { from { route-filter 200.200.0.0/21 longer;

}

then accept;

}

Click the Exhibit button.

R2 is exporting static routes to R1 using BGP. R1 is not receiving one of the five static routes that is configured on R2.

Referring to the exhibit, what should be changed under the BGP configuration to resolve this issue?

Answers

Explanations

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A. B. C. D.

B

Based on the provided output and configuration, it seems that R2 is exporting static routes to R1 using BGP, but R1 is not receiving one of the five static routes that is configured on R2. To resolve this issue, we need to check the BGP configuration on R2 and look for any potential misconfigurations.

First, let's take a closer look at the BGP configuration on R2:

typescript
user@R2> show configuration protocols bgp export export-200; group c5 { neighbor 192.168.100.2 { export export-200.200; peer-as 65002; } }

This output shows that R2 has a BGP group named "c5" that includes a BGP neighbor with the IP address of 192.168.100.2, which corresponds to R1. The export-200.200 statement is configured under this neighbor, which means that R2 is exporting routes that match the policy export-200.200 to R1.

Next, let's look at the policy configuration on R2:

sql
user@R2> show configuration policy-options policy-statement export-200.200 term 1 { from { route-filter 200.200.0.0/22 longer; } then accept; }

This output shows that R2 has a policy named "export-200.200" that matches routes that are longer than or equal to 200.200.0.0/22 and accepts them. This means that R2 should export all the static routes that are configured on R2 for the 200.200.0.0/24 network to R1.

Finally, let's take a look at the output from R1's show route command:

ruby
user@R1> show route protocol bgp inet.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden) + = Active Route, - = Last Active, * = Both 200.200.0.0/24 *[BGP/170] 00:00:47, localpref 100 AS path: 65001 I - > to 192.168.100.1 via ge-1/1/5.435 200.200.1.0/24 *[BGP/170] 00:00:47, localpref 100 AS path: 65001 I - > to 192.168.100.1 via ge-1/1/5.435 200.200.2.0/24 *[BGP/170] 00:00:47, localpref 100 AS path: 65001 I - > to 192.168.100.1 via ge-1/1/5.435 200.200.3.0/24 *[BGP/170] 00:00:47, localpref 100 AS path: 65001 I - > to 192.168.100.1 via ge-1/1/5.435

This output shows that R1 is only receiving routes for the 200.200.0.0/24 network, but not for the other networks (200.200.1.0/24, 200.200.2.0/24, 200.200.3.0/24) that are configured on R2.

To resolve this issue, we need to check the policy configuration and look for any potential misconfigurations. The policy export-200.200 matches routes that are longer than or equal to 200