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PoE (Power over Ethernet) Capability and Port Configuration
The switch has 48 x 10/100/1000BASE-T PoE+ (IEEE 802.3at) downlink ports, providing up to 30 W to endpoints such as IP phones, WLAN APs, surveillance cameras and IoT devices. It provides 4 fixed 10G SFP+ ports for uplink connectivity to the high speed backbone integration. The total PoE budget is 740W with a single power supply, expandable to 1,440W with a second PSU (both power slots only accept 1,000W units for 48-port PoE versions).
Security & Optimisations
Supporting wire-speed, non-blocking performance in demanding network environments, the switch offers a switching capacity of 176 Gbps and a forwarding rate of 130.95 Mpps. StackWise™ technology provides 80 Gbps of stacking bandwidth and enables management of up to eight switches as a single logical unit. The chassis features dual fixed redundant fans for cooling and can support field replacement dual hot swappable power supplies.
The platform is powered by the UADP 2.0 Mini ASIC and Cisco IOS XE and provides a wide range of security features including AES-128 MACsec encryption (on all ports), 802.1X authentication, DHCP Snooping, and Dynamic ARP Inspection. CLI and SNMP Management options, model-driven programmability with NETCONF/RESTCONF, and interaction with Cisco Catalyst Center for policy-based automation and network assurance.
Best Practice & Software
The switch is available with two perpetual software license options: Network Essentials (E) for basic Layer 2/3 functionality and static routing or OSPF routing, and Network Advantage (A) for full dynamic routing (BGP, EIGRP, IS-IS) and VRF-based segmentation. The C9200L 48P 4X series is ideal for high PoE+ deployments in campus access layers, large branch offices, and converged networks that require both Gigabit access and future-ready 10G uplink capability.
What is the Cisco Catalyst C9200L-48P-4X?
The Cisco Catalyst C9200L-48P-4X is a mid-to-high-end enterprise access switch in the Catalyst 9200L family. It is designed for campus access layer, branch aggregation, and enterprise edge deployments.
It combines:
● 48 × Gigabit PoE+ access ports.
● 4 × 10G SFP+ uplink ports.
● Full Layer 2 + Layer 3 capabilities (IOS-XE).
● Stackable architecture (StackWise-80).
It is part of Cisco's IOS-XE enterprise switching platform, unlike Catalyst 1300 series SMB switches.
Port architecture
Access ports：
● 48 × 10/100/1000BASE-T RJ45 ports.
● IEEE 802.3af / 802.3at PoE+ support.
● Up to 30W per port (model-dependent power budget).
Uplink ports：
● 4 × 10G SFP+ uplinks.
● Can be used for:
○ Distribution switch uplinks.
○ Core network uplinks.
○ High-speed server connections.
PoE (Power over Ethernet)
Power characteristics：
● Full PoE+ support across 48 ports.
● Typical PoE budget up to ~740W depending on power supply configuration.
PoE features：
● Dynamic power allocation.
● Per-port power prioritization.
● Power policing and overload protection.
● Device classification (af/at detection).
Typical deployments：
● Wi-Fi 5 / Wi-Fi 6 access points.
● IP surveillance systems.
● VoIP phones.
● IoT edge devices.
PoE (Power over Ethernet)
VLAN and segmentation：
● IEEE 802.1Q VLAN tagging.
● Voice VLAN.
● Private VLAN support.
● Inter-VLAN trunking.
Loop prevention：
● STP / RSTP / MSTP.
● BPDU Guard.
● Root Guard.
Switching controls：
● LACP link aggregation.
● Port Security (MAC limiting).
● Storm Control (broadcast/multicast suppression).
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