Cisco C9400-SUP-1XL-Y-2 | Catalyst 9400 Supervisor Module, 240Gbps, 2x 25G SFP28 Uplink

Q: What does the '-2' suffix indicate in C9400-SUP-1XL-Y-2?
A: The '-2' suffix designates this as the second (redundant/standby) supervisor module for high availability deployments. The primary supervisor is ordered as C9400-SUP-1XL-Y, while the redundant unit is C9400-SUP-1XL-Y-2. Both are required for full N+1 redundancy.

Q: How does the SUP-1XL-Y differ from the standard SUP-1XL?
A: The SUP-1XL-Y adds native 25G uplink support via 2x SFP28 ports, enabling cost-effective migration from 10G to 25G in core/aggregation layers. It also supports up to 240 Gbps per slot in C9404R chassis and enhanced UPOE+ (90W per port) capabilities for high-power IoT and Wi-Fi 6/6E deployments.

Q: Can I mix SUP-1XL and SUP-1XL-Y in the same chassis?
A: While both supervisors are compatible with the same line cards, Cisco recommends using matching supervisor models (both SUP-1XL or both SUP-1XL-Y) in redundant configurations to ensure consistent feature sets, bandwidth allocation, and seamless failover behavior.

Q: Does the C9400-SUP-1XL-Y support MACsec encryption?
A: MACsec-256 encryption is supported on line card ports but is currently not supported in hardware on the supervisor's uplink ports. Access-layer MACsec is fully supported at line rate for securing campus traffic.

Q: What deployment scenarios benefit most from the SUP-1XL-Y?
A: The SUP-1XL-Y is ideal for mid-to-large campus aggregation and distribution layers requiring 25G uplinks to the core, high-density PoE+ or UPOE+ for Wi-Fi 6E access points, IP cameras, and digital building applications, and mission-critical uptime with dual supervisor redundancy.