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Details:
Description
Switching Capacity
  • QFX5120-48Y: 2/4 Tbps (uni/bidirectional)/2 Bpps
  • QFX5120-48YM: 2/4 Tbps (uni/bidirectional)/2 Bpps
  • QFX5120-48T: 1.08/2.16 Tbps (uni/bidirectional)/1 Bpps
  • QFX5120-32C: 3.2/6.4 Tbps (uni/bidirectional)/2 Bpps
Switching Mode (All Models) Cut-through and store-and-forward
Weight
  • QFX5120-48Y: 23.7 lb (10.75 kg)
  • QFX5120-48YM: 23.37 lb (10.60 kg)
  • QFX5120-48T: 24.25 lb (11 kg)
  • QFX5120-32C: 21.12 lb (9.58 kg)
Dimensions (H x W x D)
  • QFX5120-48Y: 1.72 x 17.36 x 20.48 in. (4.37 x 44.09 x 52.02 cm)
  • QFX5120-48YM: 1.72 x 17.36 x 20.48 in. (4.37 x 44.09 x 52.02 cm)
  • QFX5120-48T: 1.72 x 17.36 x 20.48 in. (4.37 x 44.09 x 52.02 cm)
  • QFX5120-32C: 1.7 x 17.26 x 20.27 in. (4.32 x 43.84 x 51.5 cm)
Power Consumption
  • QFX5120-48Y: Max 283 W, Typical 185 W
  • QFX5120-48YM: Max 446 W (460 W with MACsec), Typical 310 W (321 W with MACsec)
  • QFX5120-48T: Max 251 W, Typical 205 W
  • QFX5120-32C: Max 365 W, Typical 191 W
Airflow Front-to-back (airflow out) for hot aisle deployment; Back-to-front (airflow in) for cold aisle deployment
Interface Options
  • QFX5120-48Y: 2 management ports, 48x 1GbE SFP, 48/80x 10GbE SFP+, 48/80x 25GbE SFP, 8x 40GbE QSFP+, 8x 100GbE QSFP28
  • QFX5120-48YM: 2 management ports, 48x 1GbE SFP, 48/56x 10GbE SFP+, 48/56x 25GbE SFP, 8x 40GbE QSFP+, 8x 100GbE QSFP28
  • QFX5120-48T: 1 management port, 48x 1GbE RJ45 (1GbE/10GbE), 6x 40GbE QSFP+, 6x 100GbE QSFP28
  • QFX5120-32C: 1 RJ-45 in-band management port, 2 native 10GbE SFP+ ports, 124x 10GbE SFP+ (with breakout cable), 124x 25GbE SFP (with breakout cable), 32x 40GbE QSFP+, 32x 100GbE QSFP28
Common to All Models
  • 1 USB 2.0 port
  • 1 RS-232 console port
  • Supported transceiver and DAC: QSFP+ DAC cables, QSFP+ optics, QSFP28 optics
  • Versatile four post mounting options for 19-in server rack or datacom rack
Airflow Redundant (N+1) and hot-pluggable fan modules for front-to-back and back-to-front airflow; Redundant variable-speed fans to reduce power draw
Power Supply and Fan Modules Dual redundant (1+1) and hot-pluggable 650 W AC/DC power supplies; 100-240 V single phase AC power; -48 to -60 V DC power supply; Redundant fan modules
Performance Scale (Unidimensional)
  • MAC addresses per system: 288,000
  • VLAN IDs: 4094
  • Number of LAGs: 80 (QFX5120-48Y/YM, QFX5120-32C), 64 (QFX5120-48T)
  • Number of ports per LAG: 64
  • IPv4 unicast routes: 2,000,000 prefixes (RIB); 351,000 prefixes (FIB); 211,000 host routes; 64 ECMP paths
  • IPv4 multicast routes: 106,000
  • IPv6 unicast routes: 500,000 prefixes (RIB); 172,000 prefixes (FIB); 106,000 host routes
  • IPv6 multicast routes: 52,000
  • ARP entries: 64,000
  • Jumbo frame: 9216 bytes
  • Spanning Tree Protocol (STP): MSTP (64 instances), VSTP (509 instances)
  • Traffic mirroring: 4 destination ports per switch, 4 mirroring sessions, 4 destination VLANs per switch
  • 100,000 L2 IGMP snooping*
Software Features Supported
  • Layer 2 Features: STP, RSTP, MSTP, BPDU protect, loop protect, root protect, VLAN trunking, RVI, Port-based VLAN, Private VLAN (PVLAN), VLAN translation, static MAC address assignment, MACsec (QFX5120-48YM only), Virtual chassis support
  • Link Aggregation: MC-LAG, LAG load sharing algorithm
  • Layer 3 Features (IPv4): Static routing, RIP, OSPF, IS-IS, BGP, VRRP, virtual router, DHCP relay, proxy ARP
  • EVPN-VXLAN Features: MAC-VRF, symmetric inter-IRB routing, proxy IGMPv2, ESI-LAG, VLAN rewrite support
  • Multicast Features: IGMP (v1, v2, v3), PIM-SM, PIM-SSM, PIM-DM, MSDP
  • Security and Filters: Secure interface login and password, RADIUS, TACACS+, ingress/egress filters, SSH, storm control, source MAC filtering
  • Quality of Service (QoS): Classification, rewrite, queuing, rate limiting, ingress policing, egress shaping, strict-priority queue, congestion avoidance (WRED), DSCP copy for EVPN-VXLAN
  • IP Storage: PFC, DCBX, ROCEv2
  • High Availability: BFD, Uplink failure detection
  • MPLS: LSPs, RSVP, LDP, CoS, LSR support, IPv6 tunneling, IPv4 L3 VPN
  • Management and Analytics: Apstra Intent-based System, Juniper Mist Wired Assurance, Junos Space® Network Director, Paragon Insights
  • Device Management and Operations: CLI management, SNMP, sFlow, Python, ZTP, Junos OS event scripts, Traffic Mirroring
  • Standards Compliance: IEEE Standards, T11 Standards, Supported RFCs
Approvals
  • Safety: CAN/CSA-C22.2 No. 62368-1-14, UL 62368-1, EN 62368-1: 2014, IEC 62368-1: 2014 2nd Edition
  • EMC: EN 300 386 V1.6.1, EN 55032:2012, EN 55024:2010, FCC 47 CFR Part 15, ICES-003, VCCI-CISPR 32:2016

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