Subject: [Srcomp] REQ-08-19-SEGMENT-LOCATOR-DIVERSITY-01

From: Ron Bonica <[email-masked]>
Date: Fri, 28 Aug 2020 20:13:16 +0000

Short Name:  Segment Locator Diversity

Description: SR paths contain one or more segments. Each segment contains a locator and an function. The compression mechanism must be able to represent SR paths whose segments are diverse from one another with respect to locator type. The following are examples of locator types:

  *   Global Unicast
  *   Unique Local Address
  *   Multicast Address

Rational:

  *   Deployment in existing networks: Network operators will deploy the compression mechanism in brownfield networks. These networks already have addressing plans and cannot change their addressing plans to accommodate the compression mechanism.
  *   Merging networks: In the future, network operators will merge networks that deploy the compression mechanism. Network operators cannot change the addressing plan of either network before the merge, in order to accommodate the compression mechanism.

Metrics: The compression mechanism must be support SR paths whose segments are identified by any combination of locator types. For example, assume that Networks A, B, C and D merge to form a single SRv6 domain. Without renumbering, the compression mechanism MUST support an SR path that traverses all four network. In this example:

  *   Network A draws Locators from a /48 global address space that was assigned to Network Operator A
  *   Network B draws Locators from a /56 global address space that was assigned to Network Operator B
  *   Network C draws Locators from a /48 Unique Local Address (ULA) space that was generated by Network operator C
  *   Network C draws Locators from another /48 Unique Local Address (ULA) space that was generated by Network operator D

Category: Functional

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