Thông số kỹ thuật Switch Juniper EX2200-24T-4G-TAA

Physical Specifications
Dimensions (W x H x D)	– Width: 17.4 in (44.1 cm) for desktop installations 17.5 in (44.6 cm) with rack-mount brackets – Height: 1.75 in (4.45 cm) for 1U installations – Depth: 10 in (25.43 cm)
Weight	6 lb (2.7 kg)
Environmental Ranges	– Operating temperature: 32° to 113° F (0° to 45° C) – Storage temperature: -40° to 158° F (-40° to 70° C) – Operating altitude: up to 10,000 ft (3,048 m) – Non-operating altitude: up to 16,000 ft (4,877 m) – Relative humidity operating: 10% to 85% (noncondensing) – Relative humidity non-operating: 0% to 95% (noncondensing)
Power Options	50 W AC
Hardware Specifications
Switching Engine Model	Store and forward
DRAM	512 MB
Flash	1 GB
CPU	800 MHz ARM CPU
GbE port density per system	28 (24 host ports + four-port GbE uplinks)
Physical Layer	– Physical port redundancy: Redundant Trunk Group (RTG) – Time-domain reflectometry (TDR) for detecting cable breaks and shorts – Auto MDI/MDIX (medium-dependent interface/mediumdependent interface crossover) support – Port speed downshift/setting maximum advertised speed on 10/100/1000BASE-T ports – Digital optical monitoring for optical ports
Packet Switching Capacities	56 Gbps
Layer 2 Throughput (Mpps)	41.7 Mpps (wire speed)
Layer 2 Switching	– Maximum MAC addresses in hardware: 16,000 – Jumbo frames: 9216 bytes – Number of VLANs: 1,024 (VLAN IDs: 4,096) – Port-based VLAN – MAC-based VLAN – Voice VLAN – Private VLAN (PVLAN) – IEEE 802.1ak: Multiple VLAN Registration Protocol (MVRP) – Multicast VLAN Registration (MVR) – Compatible with Per-VLAN Spanning Tree Plus (PVST+) – RVI (Routed VLAN Interface) – IEEE 802.1AB: Link Layer Discovery Protocol (LLDP) – LLDP-MED with VoIP integration – IEEE 802.1D: Spanning Tree Protocol – IEEE 802.1p: CoS prioritization – IEEE 802.1Q: VLAN tagging – IEEE 802.1Q-in-Q: VLAN Stacking – IEEE 802.1s: Multiple Spanning Tree Protocol (MSTP) – Number of MST instances supported: 64 – IEEE 802.1w: Rapid Spanning Tree Protocol (RSTP) – IEEE 802.1X: Port Access Control – IEEE 802.3: 10BASE-T – IEEE 802.3u: 100BASE-T – IEEE 802.3ab: 1000BASE-T – IEEE 802.3z: 1000BASE-X – IEEE 802.3x: Pause Frames/Flow Control – IEEE 802.3ad: Link Aggregation Control Protocol (LACP) – IEEE 802.3ah: Ethernet in the First Mile – IEEE 802.1ag: Connectivity Fault Management (CFM) – G.8032 (Ethernet Ring Protection)
Layer 3 Features: IPv4	– Maximum number of Address Resolution Protocol (ARP) entries: 2,000 – Maximum number of IPv4 unicast routes in hardware: 6500 – Routing protocols: – RIP v1/v2 – OSPF v1/v2 (with 4 active interfaces) – Static routing – Bidirectional Forwarding Detection (BFD) – IP directed broadcast – VRF-Lite
Layer 3 Features: IPv6 Management Functionality	– Neighbor discovery, Syslog, Telnet, SSH, J-Web, SNMP, NTP, DNS – Static routing
Access control lists (ACLs) (Junos OS firewall filters)	– Port-based ACL (PACL)—ingress – VLAN-based ACL (VACL)—ingress and egress – Router-based ACL (RACL)—ingress and egress – ACL entries (ACE) in hardware per system: 1,500 – ACL counter for denied packets – ACL counter for permitted packets – Ability to add/remove/change ACL entries in middle of list (ACL editing) – L2-L4 ACL
Quality of Service (QoS)	– Layer 2 QoS – Layer 3 QoS – Ingress policing: 1 rate 2 color – Hardware queues per port: 8 – Scheduling methods (egress): Strict Priority (SP), shaped deficit weighted round-robin (SDWRR) – 802.1p, 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 – Congestion avoidance capabilities: Tail drop
Multicast	– IGMP snooping entries: 1,000 – IGMP: v1, v2, v3 – IGMP snooping – PIM-SM, PIM-SSM, PIM-DM
Safety Certifications	– UL-UL60950-1 (Second Edition) – C-UL to CAN/CSA 22.2 No.60950-1 (Second Edition) – TUV/GS to EN 60950-1 (Second Edition) – CB-IEC60950-1 (Second Edition with all country deviations) – EN 60825-1 (Second Edition)
Electromagnetic Compatibility Certifications	– FCC 47CFR Part 15 Class A – EN 55022 Class A – ICES-003 Class A – VCCI Class A – AS/NZS CISPR 22 Class A – CISPR 22 Class A – EN 55024 – EN 300386 – CE
NEBS	– GR-63-Core: NEBS, Physical Protection – GR-1089-Core: EMC and Electrical Safety for Network Telecommunications Equipment – All models except EX2200-24P-4G, EX2200-48P-4G and EX2200-24T-4G-DC
Acoustic Noise in DBA	32.7