Allied Telesis AT-FL-XS9X-UDLD UDLD License for XS900MX

Detect one-way link failures before they turn into forwarding problems. The Allied Telesis UDLD License for XS900MX Series enables unidirectional link detection on supported switches, helping network teams identify asymmetric connectivity conditions that can disrupt stable operation. This license is a strong fit for environments that depend on precise link-state awareness across fiber uplinks and other critical switch interconnects. By adding UDLD capability to the XS900MX platform, it helps reduce the risk of loops, blackholing, and hard-to-trace instability caused by a link that appears up on one end but not the other. For teams running production access or aggregation layers, the value is in control and visibility. You get a platform-specific software entitlement that supports cleaner fault isolation and more predictable recovery behavior without replacing the switch. It is the kind of targeted license that makes an existing Allied Telesis deployment more dependable where link integrity matters most.