A router has the SRv6 function enabled and is configured as shown in the figure. Which of the following descriptions of this configuration are correct? (Multiple choice) [Router-seement-routing…

Question

Options

• AThe 1ocator of this node is 2001: DB8: ABCD::
• BThe args field of this node occupies 32 bits
• CThe static segment of this node occupies 32 bits
• DThe dynamic segment of this node occupies 32 bits

• A
  79% (23)
• B
  14% (4)
• C
  7% (2)

Explanation

Option A is correct because the ipv6-prefix 2001:DB8:ABCD:: 64 portion of the command defines the 64-bit locator prefix, and 2001:DB8:ABCD:: is that locator address for this node. Option D is correct because the dynamic segment is calculated as what remains after accounting for the locator and static allocation: 128 − 64 (locator) − 32 (static pool) = 32 bits for the dynamic segment.

B is wrong because no args field is configured here; with 64 bits consumed by the locator and the remaining 64 bits split between the static pool (32 bits) and dynamic segment (32 bits), the args field equals 0 bits, not 32. C is wrong because static 32 does not define a "static segment" field within the SID structure - it specifies 32 bits as the pool from which statically configured function IDs are drawn; the segment that actually exists in the SID layout is the dynamic segment (D), not a dedicated static field.

Memory tip: Picture the 128-bit SRv6 SID as three slices - Locator (64) | Static Pool (32) | Dynamic (32) - and remember that static <n> carves out bits for manual SID assignment, so the remaining slice automatically becomes the dynamic segment. "Args" only exists when separately and explicitly configured, making B a classic exam trap.

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