Optics- 100 Mbps optic/connector type: LC SFP fiber supporting 100BASE- FX SFP (multimode) and BX (single strand)
 - 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 (single-mode), or LH/ZX (single-mode)
 
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/medium- dependent interface crossover) support
 - Port speed downshift/setting maximum advertised speed on 10/100/1000BASE-T ports
 - Digital optical monitoring for optical ports
 
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 802.3af: PoE
 - IEEE 802.3at: PoE+
 - 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
 
Supported RFCs
- RFC 3176 sFlow
 - RFC 2925 MIB for remote ping, trace
 - RFC 1122 Host requirements
 - RFC 768 UDP
 - RFC 791 IP
 - RFC 783 Trivial File Transfer Protocol (TFTP)
 - RFC 792 Internet Control Message Protocol (ICMP)
 - RFC 793 TCP
 - RFC 826 ARP
 - RFC 894 IP over Ethernet
 - RFC 903 Reverse ARP (RARP)
 - RFC 906 TFTP bootstrap
 - RFC 1027 Proxy ARP
 - RFC 2068 HTTP server
 - RFC 1812 Requirements for IP Version 4 routers
 - RFC 1519 Classless Interdomain Routing (CIDR)
 - RFC 1256 IPv4 ICMP Router Discovery (IRDP)
 - RFC 1058 RIP v1
 - RFC 2453 RIP v2
 - RFC 1492 TACACS+
 - RFC 2138 RADIUS authentication
 - RFC 2139 RADIUS accounting
 - RFC 3579 RADIUS Extensible Authentication Protocol (EAP) support for 802.1X
 - RFC 5176 Dynamic Authorization Extensions to RADIUS
 - RFC 2267 Network ingress filtering
 - RFC 2030 Simple Network Time Protocol (SNTP)
 - RFC 854 Telnet client and server
 - RFC 951, 1542 BootP
 - RFC 2131 BOOTP/DHCP relay agent and DHCP server
 - RFC 1591 Domain Name System (DNS)
 - RFC 2474 DiffServ Precedence, including 8 queues/port
 - RFC 2598 DiffServ Expedited Forwarding (EF)
 - RFC 2597 DiffServ Assured Forwarding (AF)
 - LLDP Media Endpoint Discovery (LLDP-MED), ANSI/TIA-1057, draft 08
 
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