WS-C4500X-16SFP+ Specification
 | 
| Expansion Module (Optional) | 
8×10 GE SFP+/SFP – C4KX-NM-8SFP+ | 
| Management Port | 
10/100/1000 Base-T | 
| USB Port | 
Type A (storage and boot) up-to 4 GB | 
| Dual Power Supply | 
Yes | 
| Field Replaceable Fans | 
Yes (5 fans) | 
| Fan Redundancy | 
No performance impact with single fan failure | 
| System Throughput | 
Up to 800 Gbps | 
| IPv4 Routing in Hardware | 
Up to 250 Mpps | 
| IPv6 Routing in Hardware | 
Up to 125 Mpps | 
| L2 Bridging in Hardware | 
Up to 250 Mpps | 
| Media Access Control (MAC) Entries | 
55K | 
| Forwarding Entries | 
16×10 GE Port Base SKU: IPv4: 64K, IPv6: 32K | 
| Flexible Netflow Entries | 
128K | 
| Switched Port Analyzer (SPAN), Remote Switched Port Analyzer (RSPAN) | 
8 line rate bidirectional sessions (ingress and egress) | 
| Total VLANs | 
4094 | 
| Total Switched Virtual Interfaces (SVIs) | 
4094 | 
| IGMP groups | 
32K | 
| Multicast routes | 
16×10 GE Port Base SKU: IPv4: 24K, IPv6: 12K | 
| Dynamic Host Configuration Protocol (DHCP) Snooping Entries | 
12K (DHCP snooping bindings) | 
| ARP Entries | 
47K | 
| Spanning Tree Protocol Instances | 
10K | 
| Jumbo Frame Support for Bridged and Routed Packets | 
Up to 9216 bytes | 
| High Availability Solution | 
Virtual Switching System (VSS) | 
| Number of stackable switches in VSS | 
Up to 2 | 
| VSS Throughput | 
Up to 1.6 Tbps | 
| Virtual Switch Link | 
1GE or 10GE | 
| Max number of Virtual Switch Links | 
8 | 
| In-Service Software Upgrade | 
Across the switches | 
| Nonstop Forwarding with Stateful Switchover | 
Across the switches | 
| Onboard Memory (SRAM DDR-II) | 
4 GB | 
| Port Buffers | 
32-MB Shared Memory | 
| CPU | 
Dual Core 1.5 GHz | 
| NVRAM | 
2 GB | 
| Optional External Memory (SD Card) | 
2 GB | 
| Port Queues | 
8 Queues/Port | 
| CPU Queues | 
64 | 
| QoS Entries | 
128K (64K ingress and 64K in egress) Shared with ACL | 
| Aggregate Rate-Limiting | 
Ingress port or VLAN and egress VLAN or Layer 3 port | 
| Rate-Limiting Level Types | 
Committed Information Rate (CIR), Peak Information Rate (PIR) | 
| Aggregate Traffic Rate-Limiting Policers (1K=1024) | 
16K | 
| Flow-Based Rate-Limiting Method; Number of Rates | 
Supported using flow-records in the classification criteria and policing action | 
| Qos Policy Enforcement | 
Per Port or Per Vlan or Per Port, Per VLAN Granularity | 
| Class of Service (CoS) | 
Yes | 
| Differentiated Services Code Point (DSCP) | 
Yes | 
| Port Security | 
Yes | 
| IEEE 802.1x and 802.1x Extensions | 
Yes | 
| VLAN, Router, and Port ACLs | 
Yes | 
| Security ACL Entries (1K=1024) | 
128K (64K ingress and 64K in egress) Shared with QoS | 
| Unicast Reverse Path Forwarding (uRPF) Check in Hardware | 
Yes | 
| CPU Rate Limiters (DoS Protection) Includes Control Plane Policing | 
Yes | 
| Private VLANs | 
Yes | 
| Micro Flow Policer | 
Yes. Supported using flow records in the class-map | 
| CPU HW Rate Limiters by Packet Per Second (pps) and Bit Rate Policers (bps) | 
Supported in hardware control-plane policing (CoPP) | 
| Control Plane Policing (CoPP) for Multicast | 
Yes | 
| ACL Labels | 
Yes |