300-510 SPRI: Implementing Cisco Service Provider Advanced Routing SolutionsDemo

By Cisco · Question Mode

QuestionQ182

MPLS and Segment Routing

How does SRv6 operate on the control plane?

  • A The egress node of the SR domain imposes a new outer IPv6 header.
  • B The ingress node of the SR domain swaps the SRv6 header for the IPv6 header.
  • C It enables SRH-capable nodes to terminate IPv6 packets at the network egress to carry the SRv6 locator.
  • D The ingress node of the SR domain adds a uSID format IPv6 header to carry the SRv6 locator.
Explanation

An SRv6 ingress (headend) node imposes an outer IPv6 header for SRv6 encapsulation. The destination address carries the SRv6 SID information, whose locator identifies the relevant SRv6 node; in a uSID deployment, that address uses the uSID format to encode micro-segments. Cisco documents that an ingress node can impose an SRH on an IPv6 packet and that a locator can be configured in the usid-f3216 format.

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