This read-write Integer32 (1-200000) caps the total number of concurrent TCP and UDP sessions this Virtual Router's stateful packet filter will track, dropping any connection beyond that limit. An admin raises this on a VR handling heavy traffic to avoid legitimate new sessions being refused once the table fills, or lowers it to bound memory use on a smaller deployment. For example, if users behind a busy VR start seeing new connections silently fail during peak hours, the admin would check whether this size has been exhausted and increase it.