300-510 · Question #269
300-510 Question #269: Real Exam Question with Answer & Explanation
The correct answer is B: PE1(config)# router isis SR. The SRGB is the range of Segment IDs (SIDs) used by routers for global segment routing labels. The question specifies the need for an SR-MPLS forwarding plane using a SID range of 8000. A correct SRGB range must accommodate this SID range while ensuring no conflict with LDP label
Question
Refer to the exhibit. A network engineer must enable connections from customers on PE1 to the external network via the SR-MPLS forwarding plane with a range of 8000 SID. In the current environment: - The MPLS forwarding tables on PE1 and PE2 are populated with LDP- originated LDP labels. - The current ranges are 16100 - 16199 on PE1 and 16200 - 16299 on PE2. Which configuration must the engineer apply?
Options
- APE1 (config)# router isis SR
- BPE1(config)# router isis SR
- CPE1(config)# router isis SR
- DPE1(config)# router isis SR
Explanation
The SRGB is the range of Segment IDs (SIDs) used by routers for global segment routing labels. The question specifies the need for an SR-MPLS forwarding plane using a SID range of 8000. A correct SRGB range must accommodate this SID range while ensuring no conflict with LDP label Current Environment and Label Ranges: PE1 uses 16100 - 16199. PE2 uses 16200 - 16299. segment-routing global-block 16000 24000 ensures the SRGB range accommodates both SR SIDs and the LDP labels. segment-routing mpls sr-prefer tells the router to prefer SR-MPLS labels over LDP labels for The addition of address-family ipv4 unicast ensures the configuration applies to IPv4 routing.
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