UDLD License for GS900MX Series

Add UDLD capability to GS900MX series switches to help identify unidirectional link faults before they create wider network issues. In switching environments where fiber uplinks carry critical traffic, early detection matters: a silent one-way failure can be harder to diagnose than a hard link loss and can lead to instability or traffic blackholing. This license is a practical fit for teams that want tighter control over Layer 2 resilience without replacing the underlying switch platform. It supports operational confidence in aggregation, uplink, and distribution designs where link health is part of service continuity. For procurement teams, the value is straightforward: extend the capability of installed GS900MX hardware with a targeted software entitlement instead of overbuying new infrastructure. That makes it a focused upgrade for networks that need better fault detection and cleaner operational visibility.