Techniques and architecture are described for a controller that encodes hop-by-hop unprotected adjacency SIDs in SRv6 SID compressed carriers in IPV6 destination address (DA) and segment routing heading (SRH). In configurations, the adjacency SIDs are locally scoped and require encoding of a node SID followed by the adjacency SID. However, network devices are updated to handle back-to-back adjacency SIDs as the SR circuit-style SID list is computed and encoded hop-by-hop. The techniques and architecture also provide a F3208 SID format, which provides compressed data comprising eight bits. Using the F3208 SID format, the controller may encode up to 14 hop-by-hop unprotected adjacency SIDs in a single 128-bit IPv6 address and an additional 14 adjacency SIDs+14 adjacency SIDs, which equals 28 adjacency SIDs, in the SRH. The F3208 format may be extended to handle cases where the number of interfaces is more than 28, which equals 256 interfaces.