How does SRv6 function on the control plane?

Question

Options

• AIt enables SRH-capable nodes to terminate IPv6 packets at the network egress to carry the SRv6
• BThe ingress node of the SR domain adds a uSID format IPv6 header to carry the SRv6 locator.
• CThe ingress node of the SR domain swaps the SRv6 header for the IPv6 header
• DThe egress node of SR domain imposes a new outer header

• A
  5% (2)
• B
  89% (33)
• C
  3% (1)
• D
  3% (1)

Explanation

In SRv6 (Segment Routing over IPv6), the control plane operates by having the ingress node of the SR domain impose an IPv6 Segment Routing Header (SRH) containing an ordered list of SIDs (Segment Identifiers). With the uSID (micro-SID) format, multiple segment instructions are encoded compactly within a single 128-bit IPv6 address, allowing more segments to be stacked efficiently. The ingress node is responsible for encapsulation and determines the full segment list. Option A is incorrect - termination is a data plane function at the egress. Option C is wrong - the ingress adds (imposes) the SRH, it does not swap headers. Option D is incorrect - the egress node removes/terminates the outer header, it does not impose one.

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