Subject: [Srcomp] REQ-08-19-SEGMENT-LOCATOR-DIVERSITY-02

From: Ron Bonica <[email-masked]>
Date: Tue, 8 Sep 2020 20:37:11 +0000

Short Name:  Segment Locator Diversity

Description: The compression mechanism must not rely upon any of the following:

  *   A particular addressing plan
  *   A particular relationship among locators within an SR path
  *   A particular relationship among IPv6 addresses within an SR path

Rational:

  *   Network operators will deploy the compression mechanism in brownfield networks. A brownfield network is likely to have an existing addressing plan. Furthermore, it is likely to have configured its routing and security infrastructure to conform to the addressing plan. Therefore, it would be difficult for the network operator to change its addressing plan to accommodate compression mechanism requirements
  *   In the future, network operators will merge networks that deploy the compression mechanism. Each network is likely to have a unique addressing plan. It may be difficult to change addressing plans before the merge to accommodate compression mechanism requirements

Metrics: The compression mechanism must be able to support an SR path where:

  *   Each locator is drawn from a unique /4. Locators can be part of GUA (2000::/3) or ULA (fc00::/7) space
  *   Each IPv6 address is drawn from a unique /4. IPv6 addresses can be part of GUA (2000::/3) or ULA (fc00::/7) space
  *   Some locators are drawn from GUA space while others are drawn from ULA space
  *   Some IPv6 addresses are drawn from GUA space while others are drawn from ULA space
  *   Each locator has a unique length. For example, some locators are /48s while others are /56s.

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