C9400-SUP-1XL-Y - Catalyst 9400 Supervisor 1XL w/ 25G | Cisco
MPN: C9400-SUP-1XL-Y ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14500 | $14,500.00 |
| 5 | $14250 | $71,250.00 |
| 10 | $14000 | $140,000.00 |
| 25 | $13750 | $343,750.00 |
| 50 | $13500 | $675,000.00 |
| 100 | $13250 | $1,325,000.00 |
C9400-SUP-1XL-Y Overview
A supervisor engine in a modular access/aggregation chassis is the centralized control plane and switching fabric manager: it runs the routing protocol stack, manages the line-card forwarding ASICs, terminates management access, and houses the bootflash, DRAM, and SSD that host Cisco IOS XE. Within Cisco's modular hierarchy, the C9400-SUP-1XL-Y sits between the entry-level C9400-SUP-1 (80 Gbps/slot, 1/10/40G uplinks) and the flagship C9400X-SUP-2/2XL (480 Gbps/slot, 100G uplinks, UADP 3.0sec), offering a balanced 240 Gbps/slot middle ground for buyers who need 25G uplinks today but do not yet require 100G or UADP 3.0sec scale.
Key features include 240 Gbps per-slot switching capacity, dual SFP28 25G uplinks, dual QSFP 40G uplink ports (ports 9-10), SSD-backed storage, Stateful Switchover (SSO) for hitless failover, advanced routing (MPLS, BGP, OSPF, EIGRP, IS-IS), SD-Access border node capability, and full IOS XE programmability via Guest Shell, Python, and NETCONF/YANG APIs.
The C9400-SUP-1XL-Y uses the UADP 2.0 ASIC combined with a multi-core x86 CPU complex and hardware-accelerated cryptography. Compared with the original C9400-SUP-1, the -1XL variant triples per-slot bandwidth from 80 Gbps to 240 Gbps, enabling full 10G line-card oversubscription-free operation and paving the way for mGig/25G access tiers.
Typical applications include enterprise core switching for campus and branch aggregation, MPLS-aware SD-Access border or collapsed-core nodes, 25G server-farm aggregation in mid-sized data centers, and high-availability dual-supervisor deployments in the Catalyst 9404R, 9407R, and 9410R modular chassis.
When designing around the C9400-SUP-1XL-Y, plan for two supervisor slots per chassis, populate redundant SSO supervisor pairs for hitless failover, and pair the supervisor with line cards that do not require the higher-bandwidth C9400X-SUP-2/2XL (some newer C9400 line cards are restricted to the X-series supervisors only, so verify compatibility per the line card matrix).
This page aggregates verified distributor specifications, drop-in supervisor alternatives in the same Catalyst 9400 family, and practical design notes not consolidated in the Cisco datasheet.
Drop-in alternatives for C9400-SUP-1XL-Y — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with C9400-SUP-1XL-Y (same form factor and footprint) — differing in Per-Slot Bandwidth, Platform, Product Type, Storage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
C9400-SUP-1XL
✅ Drop-In📋 Reference alternative (not in catalog)
C9400-SUP-1
✅ Drop-In📋 Reference alternative (not in catalog)
C9400X-SUP-2
✅ Drop-In📋 Reference alternative (not in catalog)
C9400X-SUP-2XL
✅ Drop-In✓ In Stock
$14500 / Unit
View Datasheet →C9400-SUP-1XL-Y Specifications (manufacturer-published)
| Product Type | Modular chassis supervisor engine |
| Platform | Cisco Catalyst 9400 Series (9404R, 9407R, 9410R) |
| Switching ASIC | Cisco UADP 2.0 |
| Per-Slot Bandwidth | 240 Gbps |
| SFP28 Uplink Ports | 2 x 25G (SFP28) |
| QSFP Uplink Ports | Ports 9-10, QSFP supporting 40G (LC/copper/MPO-12) |
| Storage | 240 GB SSD (default) |
| Redundancy Support | SSO (Stateful Switchover) with dual supervisor |
| Operating System | Cisco IOS XE |
| Chassis Compatibility | Catalyst 9404R, 9407R, 9410R |
| Advanced Routing | MPLS, BGP, OSPF, EIGRP, IS-IS |
| SD-Access Capability | Border/Collapsed-core node, VRF-aware LISP, host-tracking |
| Mounting Type | Catalyst 9400 supervisor slot (front) |
| RoHS Status | Compliant |
C9400-SUP-1XL-Y Interfaces & Connectors
No manufacturer-published interface list is available for C9400-SUP-1XL-Y. Refer to the manufacturer documentation for connector and header details.
Refer to the manufacturer documentation for the full expansion header pinout and connector pin numbering.
Typical Applications
C9400-SUP-1XL-Y is suitable for 6 applications: Enterprise Campus Core Switching, SD-Access Border or Collapsed-Core Node, MPLS-Aware Aggregation / WAN Edge, 25G Server-Farm Aggregation in Mid-Sized Data Centers, Dual-Supervisor High-Availability Collapsed Core, Staging and Pre-Deployment Lab Supervisor.
Enterprise Campus Core Switching
The C9400-SUP-1XL-Y's 240 Gbps per-slot bandwidth is engineered for enterprise campus core switching where thousands of 10G mGig access switches must be aggregated without congestion. With dual SFP28 25G uplinks it can scale to 25G campus cores without forklift upgrades, and the UADP 2.0 ASIC's programmable pipeline supports advanced QoS, ACL, and policy-based forwarding required for campus segmentation. Placed in a Catalyst 9407R chassis alongside 10G line cards, one -1XL-Y typically replaces two older Catalyst 6880-X chassis while halving the per-port power budget. The 25G uplink option also future-proofs the core as access-tier speeds migrate from mGig to 2.5G/5G/10G over the next refresh cycle.
Recommended
SD-Access Border or Collapsed-Core Node
The C9400-SUP-1XL-Y runs full Cisco SD-Access on IOS XE, including VRF-aware LISP, host-tracking database, and SGT inline tagging needed for fabric border or collapsed-core roles. Deploying the -1XL-Y at the SD-Access border lets IT teams terminate VXLAN overlays, enforce scalable group policies, and interconnect campus fabric with the WAN or data center. The 240 Gbps per-slot bandwidth keeps microsegmentation telemetry flowing without head-of-line blocking on 10G/25G access uplinks, and the 240 GB SSD buffers sufficient telemetry and software package history for SD-Access assurance workflows.
Recommended
MPLS-Aware Aggregation / WAN Edge
The C9400-SUP-1XL-Y supports full MPLS infrastructure services including L3VPN, L2VPN, and MPLS-TE thanks to the UADP 2.0 ASIC's programmable forwarding pipeline. This makes it ideal as an MPLS-aware aggregation or campus WAN edge node where L2/L3VPN pseudowires terminate and BGP route reflectors scale out across regional sites. Dual supervisors provide Stateful Switchover (SSO) for hitless failover, while the 25G uplinks can carry multiple 10G MPLS pseudowires with headroom. Compared to a flagship C9400X-SUP-2XL, the -1XL-Y delivers identical MPLS feature parity at 50% per-slot bandwidth and lower acquisition cost where 25G aggregation suffices.
Recommended
25G Server-Farm Aggregation in Mid-Sized Data Centers
The C9400-SUP-1XL-Y's two native SFP28 25G uplinks plus two 40G QSFP uplinks map cleanly onto 25G server leaf-and-spine topologies in mid-sized data centers. Aggregating multiple 10G/25G server ToR switches over a single Catalyst 9407R chassis reduces the device count, simplifies routing, and centralizes VLAN/VXLAN policy in one IOS XE routing instance. With 240 Gbps per slot, two -1XL-Y supervisors in SSO can sustain full 25G line-rate east-west plus north-south traffic without backplane bottlenecks. The 240 GB SSD gives operators ample room for guest VMs, telemetry buffers, and IOS XE package history in the same chassis.
Recommended
Dual-Supervisor High-Availability Collapsed Core
The Catalyst 9404R, 9407R, and 9410R chassis accept a redundant supervisor in the second supervisor slot, and the C9400-SUP-1XL-Y supports full Stateful Switchover (SSO) with sub-second failover. Deploying two -1XL-Y supervisors in SSO is the canonical collapsed-core pattern for sites that cannot tolerate a control-plane outage: routing, switching, and SD-Access state are mirrored to the standby supervisor so that a hardware fault triggers non-disruptive failover. With 240 Gbps per slot, the active supervisor continues to drain upstream traffic during the cutover, and the dual 25G uplinks plus dual 40G uplinks provide ample ECMP paths for hitless reconvergence.
Recommended
Staging and Pre-Deployment Lab Supervisor
Engineering and pre-deployment labs commonly deploy a C9400-SUP-1XL-Y to validate IOS XE image upgrades, line-card compatibility, and SD-Access/DNA Center integration before rollout to production chassis. With identical UADP 2.0 forwarding semantics and 240 Gbps per slot, lab results transfer cleanly to production -1XL-Y and -1XL deployments. The supervisor's Guest Shell and Python scripting lets network engineers automate regression tests for BGP/OSPF/MPLS feature parity across Catalyst 9400 chassis. Native 25G SFP28 test ports double as high-speed generators for traffic-shaping and QoS experiments at line rate.
Recommended
Recommended Products Summary
Engineering reference data for C9400-SUP-1XL-Y — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | C9400-SUP-1XL | C9400-SUP-1 | C9400X-SUP-2 | C9400X-SUP-2XL |
|---|---|---|---|---|---|
| Brand | Cisco | Cisco | Cisco | Cisco | Cisco |
| Package | Catalyst 9400 supervisor slot | Catalyst 9400 supervisor slot - same | Catalyst 9400 supervisor slot - same | Catalyst 9400 supervisor slot - same | Catalyst 9400 supervisor slot - same |
| Per-Slot Bandwidth | 240 Gbps | 240 Gbps | 80 Gbps (-67%) | 480 Gbps (+100%) | 480 Gbps (+100%) |
| Switching ASIC | UADP 2.0 | UADP 2.0 | UADP 2.0 (baseline) | UADP 3.0sec | UADP 3.0sec |
| Uplink Ports | 2 x SFP28 25G + 2 x QSFP (40G) | 2 x SFP+ 10G + 2 x QSFP (40G) | 2 x SFP+ 10G + 2 x QSFP (40G) | Uplinks support 100G with UADP 3.0sec | Uplinks support 100G with UADP 3.0sec |
| SSD Storage | 240 GB | 240 GB | 240 GB | 240 GB | 240 GB |
| SD-Access Support | Yes (border/collapsed-core) | Yes | Yes | Yes (enhanced) | Yes (enhanced) |
Key Differentiators
- Native 25G SFP28 uplinks on a 240 Gbps/slot supervisor (vs C9400-SUP-1XL)
- 3x per-slot bandwidth vs base C9400-SUP-1 (vs C9400-SUP-1)
- Lower acquisition cost than UADP 3.0sec supervisors (vs C9400X-SUP-2XL)
Design Notes
Five newer Catalyst 9400 line cards require C9400X-SUP-2 or C9400X-SUP-2XL and will NOT power up under C9400-SUP-1XL-Y. According to the Layer23-Switch compatibility matrix (2026-09-23), populate line cards and supervisors together only after confirming the supervisor family supports the target line card. A common field issue is that administrators swap a supervisor to a -1XL-Y expecting a slot freed by the older -1XL to accept a newer high-density line card - that combination will fail to bring up the port.
Plan dual supervisor slots for SSO redundancy even when initial deployment uses one supervisor, so future upgrades do not require chassis downtime. Estimated: each C9400-SUP-1XL-Y draws roughly 150-200 W from the chassis backplane; verify the chassis power budget reserves headroom for a second supervisor plus its licensing-tier SSD on production rollouts.
Migrate IOS XE configuration and license entitlements between a replaced C9400-SUP-1XL and an upgraded -1XL-Y only after a compatible IOS XE release is installed. Cisco IOS XE 17.x or later is recommended to enable the SFP28 25G uplink mode; older releases will not negotiate 25G transceivers. Always back up the supervisor configuration and software image to external storage before initiating an SSO supervisor swap, since the standby supervisor's image is overwritten during the cutover if versions mismatch.
Place SFP28 uplink ports facing the same row in patch panels as your existing 10G aggregation switches to simplify migration labeling. The 240 GB SSD is field-replaceable; design the supervisor insertion path with at least 30 cm of clearance behind the chassis to allow SSD swap without removing the supervisor entirely.
Compliance Information
Cisco networking modules ship RoHS-compliant per the Cisco Catalyst 9400 product documentation. AEC-Q100 and halogen-free are not typically applicable to enterprise networking modules; status marked unknown where the data did not explicitly state these attributes.
