Avaya ERS 4000 series (original) (raw)

Ethernet routing switch 4000 series or (ERS 4000) in computer networking terms are stackable layer-3 (routers) and layer-2 (switches) designed and manufactured by Avaya for Ethernet devices. The ERS 4000 series consists of two major groups of devices, the ERS 4500 models and the ERS 4800 models.