Thông số kỹ thuật Switch Juniper EX2200-48T-4G

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	8 lb (3.6 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	76 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	52 (48 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	104 Gbps
Layer 2 Throughput (Mpps)	77.4 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
Security	+ MAC limiting + Allowed MAC addresses—configurable per port + Sticky MAC (persistent MAC address learning) + Dynamic ARP inspection (DAI) + Proxy ARP + Static ARP support + DHCP snooping + IP source guard + 802.1X port-based + 802.1X multiple supplicants + 802.1X with VLAN assignment + 802.1X with authentication bypass access (based on host MAC address) + 802.1X with VoIP VLAN support + 802.1X dynamic ACL based on RADIUS attributes + 802.1X Supported EAP types: Message Digest 5 (MD5), Transport Layer Security (TLS), Tunneled Transport Layer Security (TTLS), Protected Extensible Authentication Protocol (PEAP) + Captive Portal + Trusted Network Connect (TNC) certified + Static MAC authentication + MAC-RADIUS + Control plane DoS protection + Fallback Authentication
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
High Availability	+ External redundant power system (RPS) option + Link Aggregation + 802.3ad (LACP) support: – Number of LAGs supported: 32 – Maximum number of ports per LAG: 8 + LAG load sharing algorithm—Bridged Unicast Traffic: – IP: S/D MAC, S/D IP – TCP/UDP: S/D MAC, S/D IP, S/D Port – Non-IP: S/D MAC + LAG sharing algorithm—Routed Unicast Traffic: – IP: S/D IP – TCP/UDP: S/D IP, S/D Port + LAG load sharing algorithm—Bridged Multicast Traffic: – IP: S/D MAC, S/D IP – TCP/UDP: S/D MAC, S/D IP, S/D Port – Non-IP: S/D MAC + LAG sharing algorithm—Routed Multicast Traffic: – IP: S/D IP – TCP/UDP: S/D IP, S/D Port + Tagged ports support in LAG + Uplink Failure Detection (UFD)
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	33.5