Anycast SID for Flexible and Robust Service in SRv6

Document Type Expired Internet-Draft (individual)
Authors Taixin Li  , Xu Zhou  , Zhe Chen  , Yihao Jia 
Last updated 2021-09-23 (latest revision 2021-03-22)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Segment Routing enables an operator or an application to specify a packet processing program. When Segment Routing is applied to IPv6 data plane, the list of IPv6 SIDs in SRH can specify a series of execution endpoints that hold service functions that process the packet. However, steering traffic dynamically to the different execution endpoints requires a specific "re-encapsulating". This procedure may be complex and take time. This document proposes A-SID (Anycast-SID) based on SRv6 to achieve flexible and robust service provision. It uses anycast SID to identify service functions and locates the service functions based on anycast routing. The proposed solution can stay compatibility with the existing SRv6.


Taixin Li (
Xu Zhou (
Zhe Chen (
Yihao Jia (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)