EPSR is a fast ring protection technology that provides extremely fast failover between nodes in a resilient ring, preventing a node or link failure from affecting customer experience, even with demanding applications such as IP telephony and streaming video.
The document introduces Ethernet Protection Switching Ring (EPSR), Allied Telesis' solution for ultra‑fast failover and high‑availability networking. EPSR can recover from link or node failures in as little as 50 ms, providing continuous service for voice, video and data applications.
It describes how EPSR is applied in enterprise, campus and metro networks, explains the Super Loop Prevention (SLP) feature that avoids network storms in multi‑ring topologies, and showcases Allied Telesis product families such as the x610, x600 and IMAP 9000 series that support EPSR.
| Failover time | as low as 50 ms |
|---|---|
| Stacking capacity (x610 series) | up to eight units |
EPSR can recover from a link or node failure in as little as 50 ms.
The x610 series supports stacking of up to eight units.