Hi Horatiu and Stephen, Horatiu, thanks for giving this a try. I am looking forward to maybe someday be able to run ERPS on white box switches. On 1/9/20 4:19 PM, Stephen Hemminger wrote:
Can this be implemented in userspace? Putting STP in the kernel was a mistake (even original author says so). Adding more control protocols in kernel is a security and stability risk.
Another case is VRRP, ERPS (ITU-T G.8032), VRRP group. My use-case might not be common, but I have machines with about 10k net_dev (QinQ), I would like to be able to do VRRP group on the outer VLANs, which are only a few hundred instances without excessive context switching. I would then keep the the normal keep-alive state machine in kernel, basically a BPF-based timed periodic packet emitter facility and a XDP recieve hook. So only setup and event handling has to context switched to user-space. Unfortunately I haven't had time to explore this yet, but I think such an approach could solve a few of the reasons that scalable bridge/ring/ha protocols have to wait 20 years before being implemented in Linux. -- Best regards Asbjørn Sloth Tønnesen Network Engineer Fiberby ApS - AS42541
