Micro SIDs: a solution for Efficient Representation of Segment IDs in SRv6 Networks

TL;DR

This paper introduces Micro SIDs, a novel method to significantly reduce the size of segment identifiers in SRv6 networks, improving efficiency and processing in scenarios with large segment lists.

Contribution

The paper proposes Micro SIDs, a new representation for segment IDs in SRv6 that drastically reduces header overhead and enhances network performance.

Findings

Micro SIDs reduce segment list size significantly.

The solution improves processing efficiency in SRv6 networks.

Potential to enable more scalable SRv6 deployments.

Abstract

The Segment Routing (SR) architecture is based on loose source routing. A list of instructions, called segments can be added to the packet headers, to influence the forwarding and the processing of the packets in an SR enabled network. In SRv6 (Segment Routing over IPv6 data plane) the segments are represented with IPv6 addresses, which are 16 bytes long. There are some SRv6 service scenarios that may require to carry a large number of segments in the IPv6 packet headers. This can be inefficient due to the overheads of the segment list, or can even cause processing issues in the crossed nodes due to the very large header to be processed. In this paper we present the Micro SID solution for the efficient representation of segment identifiers. With this solution, the length of the segment list can be drastically reduced.