Juniper EX4300-24T

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EX4300-24T

Hardware Specifications

Switching Engine Model

Store and forward

DRAM

2 GB with ECC

Flash

2 GB

CPU

1.5 GHz Dual-Core PowerPC CPU

GbE port density per system

 32 (24 host ports + four 40GbE ports + optional four-port 1/10GbE uplink module)

Physical Layer

• Time domain reflectometry (TDR) for detecting cable breaks and shorts
• Auto medium-dependent interface/medium-dependent interface crossover (MDI/MDIX) support
• Port speed downshift/setting maximum advertised speed on 10/100/1000BASE-T ports
• Digital optical monitoring for optical ports

Physical Layer

• Time Domain Reflectometry (TDR) for detecting cable breaks and shorts: 24P/24T and 48P/48T only 
• Auto MDI/MDIX support: 24P/24T and 48P/48T only (all ports) 
• Port speed downshift/setting max advertised speed on 10/100/1000BASE-T ports: 24P/24T and 48P/48T only, on all ports 
• Digital optical monitoring for optical ports

Packet-Switching Capacities (Maximum with 64-Byte Packets)

448 Gbps

Software Specifications

Layer 2/Layer 3 Throughput (Mpps) (Maximum with 64 Byte Packets)

 333 Mpps (wire speed)

Security

• MAC limiting (per port and per VLAN)
• Allowed MAC addresses configurable per port
• Dynamic ARP inspection (DAI)
• IP source guard
• Local proxy ARP
• Static ARP support
• DHCP snooping
• Captive portal
• Persistent MAC address configurations
• Distributed denial of service (DDoS) protection (CPU control path flooding protection)

Quality of Service (QoS)

• L2 QoS
• L3 QoS
• Ingress policing: 1 rate 2 color
• Hardware queues per port: 12
• Scheduling methods (egress): Strict priority (SP), WDRR
• 802.1p, DiffCode (DSCP)/IP precedence trust and marking
• L2-L4 classification criteria: Interface, MAC address, Ethertype, 802.1p, VLAN, IP address, DSCP/IP precedence, TCP/UDP port numbers, and more
• Congestion avoidance capabilities: Tail drop, weighted random early detection (WRED)

Multicast

• IGMP: v1, v2, v3
• IGMP snooping
• Multicast Listener Discovery (MLD) snooping
• PIM-SM, PIM-SSM, PIM-DM