| Physical Specifications |
| Dimensions (W x H x D) | • Width:
– 17.4 in (44.19 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: 10.2 in (25.9 cm) |
| Backplane | • 80 Gbps Virtual Chassis interconnect to link up to four switches as a single logical device |
| Weight | 8.29 lb (3.76 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 13,000 ft (3962 m) at 40° C according to GR-63
• Non-operating altitude: up to 15,000 ft (4572 m)
• Relative humidity operating: 10% to 85% (noncondensing)
• Relative humidity non-operating: 0% to 95% (noncondensing) |
| Hardware Specifications |
| Switching Engine Model | Store and forward |
| DRAM | 2 GB |
| Flash | 2 GB |
| CPU | 1.25GHz ARM CPU |
| GbE port density per system | 52 (48 host ports + four-port SFP/SFP+ uplinks) |
| Supported Optics | • 10/100/1000BASE-T connector type RJ-45
• GbE SFP optic/connector type: RJ-45, or LC SFP fiber supporting 1000BASE-T SFP, SX (multimode), LX (singlemode), or LH (single-mode) |
| Physical Layer | • Physical port redundancy: Redundant trunk group (RTG)
• Cable diagnostics 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 | 176 Gbps |
| Layer 2 Throughput (Mpps) | 130 Mpps (wire speed) |
| Layer 2 Switching | • Maximum MAC addresses in hardware: 16,000
• Jumbo frames: 9216 bytes
• Number of VLANs supported: 4093
• Range of possible VLAN IDs: 1-4094
• Port-based VLAN
• MAC-based VLAN
• Voice VLAN
• Layer 2 Tunneling Protocol (L2TP)
• IEEE 802.1ak: Multiple VLAN Registration Protocol (MVRP)
• 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 802.1ad Q-in-Q tunneling
• IEEE 802.1br: Bridge Port Extension
• 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
• Number of VSTP instances supported: 253
• 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 802.3ad: Link Aggregation Control Protocol (LACP)
• IEEE 802.3x: Pause Frames/Flow Control |
| Layer 3 Features: IPv4 | • Maximum number of ARP entries: 1,500
• Maximum number of IPv4 unicast routes in hardware: 512 prefixes; 4,096 host routes
• Maximum number of IPv4 multicast routes in hardware: 2,048 groups; 2,048 multicast routes
• Routing Protocols: RIP v1/v2, OSPF v1/v2
• Static routing
• Routing policy
• Bidirectional Forwarding Detection (BFD) with slow timers (> 3 sec)
• IP directed broadcast |
| Layer 3 Features: IPv6 Management Functionality | • Maximum number of Neighbor Discovery (ND) entries: 1,500
• Maximum number of IPv6 unicast routes in hardware: 512 prefixes; 2,048 host routes
• Maximum number of IPv6 multicast routes in hardware: 1,024 groups; 1,024 multicast routes
• Neighbor discovery, system logging, Telnet, SSH, SNMP, Network Time Protocol (NTP), Domain Name System (DNS)
• Static routing
• Routing protocols: RIPng, OSPF v3, Multica |
| Access control lists (ACLs) (Junos OS firewall filters) | • Port-based ACL (PACL)—256 ingress; 256 egress
• VLAN-based ACL (VACL)— 256 ingress; 256 egress
• Router-based ACL (RACL)—256 ingress; 512 egress
• ACL entries (ACE) in hardware per system: 2,000
• 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 |
| 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
• 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)
• IPv6 RA Guard
• IPv6 Neighbor Discovery Inspection
• Captive Portal
• Static MAC authentication
• MAC-RADIUS
• Control plane DoS protection
• Fallback authentication
• Trusted Network Connect (TNC) certified |
| Quality of Service (QoS) | • Layer 2 QoS
• Layer 3 QoS
• Ingress policing: one-rate two-color; two-rate three-color markers
• Hardware queues per port: 8
• Scheduling methods (egress): Strict Priority (SP), shapeddeficit 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 and WRED |
| Multicast | • IGMP snooping entries: 2,000
• IGMP: v1, v2, v3
• IGMP snooping
• PIM-SM, PIM-SSM, PIM-DM
• MLD snooping |
| 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 |
