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300-510 · Question #20

Refer to the exhibit. A network engineer implemented this segment routing configuration. Which statement about the output is true?

The correct answer is D. A nondefault segment routing global block range is being used on this device. On Cisco IOS XR, the default Segment Routing Global Block (SRGB) range is 16000 to 23999. If the configuration output shows an SRGB range outside of these defaults (e.g., a custom start or end value), it means a nondefault SRGB range has been explicitly configured. The output…

MPLS and Segment Routing

Question

Refer to the exhibit. A network engineer implemented this segment routing configuration. Which statement about the output is true?

Exhibit

300-510 question #20 exhibit

Options

  • AThis range conflicts with the segment routing local block range.
  • BThe device must be reloaded for these ranges to be allocated and used.
  • CThe default segment routing global block range is being used on this device.
  • DA nondefault segment routing global block range is being used on this device.

How the community answered

(22 responses)
  • A
    5% (1)
  • C
    9% (2)
  • D
    86% (19)

Explanation

On Cisco IOS XR, the default Segment Routing Global Block (SRGB) range is 16000 to 23999. If the configuration output shows an SRGB range outside of these defaults (e.g., a custom start or end value), it means a nondefault SRGB range has been explicitly configured. The output in the exhibit reflects such a custom range, confirming that a nondefault SRGB is in use (D). It does not conflict with the local block (A), does not require a reload to take effect in most IOS XR versions (B), and since a custom range is shown, it is not using the default range (C is false).

Topics

#Segment Routing#SRGB#MPLS#Default Configuration

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