VDX 6940 Feature Overview
  VDX 6940- 36Q VDX 6940-144S
Form Factor 1U 2U
Switching bandwidth (data rate, full duplex) 2.88 Tbps 2.88 Tbps
Switch performance 2.16 Bpps 2.16 Bpps
Port-to-port latency 800 ns 800 ns
Dimensions and weight Width: 44 cm (17.32 in.) Width: 44 cm (17.32 in.)
  Height: 4.4 cm (1.73 in.) Height: 8.7 cm (3.41 in.)
  Depth: 43.8 cm (17.22 in.) Depth: 48.5 cm (19.1 in.)
  Weight: 8.9 kg (19.6 lb) without media; 10.1 kg (22.3 lb) with media Weight: 15.46 kg (34.1 lb) empty; 17.32 kg (38.2 lb) with media
10 GbE SFP+ ports 144 10 GbE ports using breakout cables 96 fixed 10 GbE ports and additional 48 10 GbE ports with breakout cables
1 GbE SFP 0 96
1/10 GBASE-T 0 0
40 GbE QSFP+ 36 12
100 GbE QSFP28 0 4
40 GbE Ports on Demand (PoD) 24, 36 6, 12
10 GbE Ports on Demand (PoD) N/A 64, 80, 96
Power Supplies Two internal, redundant, field-replaceable, load-sharing AC/DC power supplies Two internal, redundant, field-replaceable, load-sharing AC/DC power supplies
Cooling fans 5 field-replaceable fans (FRUs); each fan FRU has 2 fans 4 field-replaceable fans (FRUs); each fan FRU has 1 fan
Airflow Rear-to-front or front-to-rear airflow Rear-to-front or front-to-rear airflow
VDX 6940 Scalability Information
Connector Options Out-of-band 
Ethernet management: RJ45 (fixed)
Console management: RJ45 to RS-232 (fixed)Firmware and diagnostic: USB
Maximum VLANs 4,096
Maximum MAC addresses 112,000 (L2 MACs); fabric-wide 256,000 (CML)
Maximum port profiles (AMPP) 512
Maximum members in a standard LAG 16
Maximum per-port priority pause level 8
Maximum switches that a vLAG can span 8
Maximum members in a vLAG 64
Maximum jumbo frame size 9,216 bytes
Queues per port 8
DCB Priority Flow Control (PFC) classes 8
Maximum ACLs 10,000
Maximum ARP entries 84,000
Maximum IPv4 unicast routes 12,000
Maximum IPv6 unicast routes 3,000
HA/ISSU ISSU fully supported
VDX 6940 Mechanical
Enclosure Front-to-rear, rear-to-front airflow; 1U (6940-36Q) and 2U (6940-144S), 19-inch EIA-compliant; power from non-port side
VDX 6940 Environmental
Temperature Operating: 0°C to 40°C (32°F to 104°F)
Non-operating and storage: -25°C to 70°C (-13°F to 158°F)
Operating: 0°C to 40°C (32°F to 104°F)
Non-operating and storage: -25°C to 70°C (-13°F to 158°F)
Humidity Operating: 5% to 93% at 50°C (122°F )
Non-operating and storage: 10% to 95% at 60°C (140°F)
Operating: 5% to 93% at 50°C (122°F )
Non-operating and storage: 10% to 95% at 60°C (140°F)
Altitude Operating: 0 -3,000 meters (9,842 feet)
Non-operating and storage: 0 to 12,000 m (39,370 ft.)
Operating: 0 to 3,000 m (9,842 ft.)
Non-operating and storage: 0 to 12,000 m (39,370 ft.)
Shock Operating: 15 G, 11 ms, half-sine wave
Non-operating and storage: 33 G, 11 ms, half-sine wave, 5/ea axis, and 33 G 6 ms, trapezoidal, 1/ea axis
Operating: 15 G, 11 ms, half-sine wave
Non-operating and storage: 33 G, 11 ms, half-sine wave, 5/ea axis, and 33 G 6 ms, trapezoidal, 1/ea axis
Vibration Operating: 1 G sine, 0.5 gms random, 5 to 500 Hz
Non-operating and storage: 2.4 G sine, 1.1 gms random, 5 to 500 Hz
Operating: 1 G sine, 0.5 gms random, 5 to 500 Hz
Non-operating and storage: 2.4 G sine, 1.1 gms random, 5 to 500 Hz
Airflow Maximum: 159 CMH (94 CFM)Minimum: 65 CMH (38 CFM) Maximum: 370 CMH (218 CFM)
Minimum: 95 CMH (56 CFM)
VDX 6940 Power
Power supplies Two internal, redundant, field-replaceable, load-sharing power supplies Two internal, redundant, field-replaceable, load-sharing power supplies
Power inlet C13 C13
Input voltage 100 to 240 V or 48 V DC 100 to 240 V or 48 V DC
Input line frequency 50 to 60 Hz 50 to 60 Hz
Inrush current 30 A peak at cold start and 50 A peak at warm start for <10 ms, 10 A peak for cycles 10 ms to 150 ms, <7 A peak for >150 ms 40 A peak at either cold or warm start <10 ms, 10 A peak for cycles 10 ms to 150 ms, <7 A peak for >150 ms
Maximum current 6 A at 100 VAC
7 A at 90 VAC 
6 A at 100 VAC
7 A at 85 VAC
Typical power consumption At 100 VAC 2.18 A, 215 W, 733.81 BTU/hr
At 200 VAC 1.12 A, 212 W, 723.57 BTU/hr
Input current calculated with 1 PSU; watts and
BTU/hour with 2 PSUs
At 100 VAC 3.288 A, 327 W, 1,116 BTU/hr
At 200 VAC 1.639 A, 321 W, 1,095 BTU/hr
Input current calculated with 1 PSU; watts and
BTU/hour with 2 PSUs
Maximum power consumption At 100 VAC 2.84 A, 282 W, 962.5 BTU/hr
At 200 VAC 1.44 A, 276 W, 942 BTU/hr
Input current calculated with 1 PSU; watts and
BTU/hour with 2 PSUs
At 100 VAC 2.706 A, 512 W, 1,747 BTU/hr
At 200 VAC 1.375 A, 500 W, 1,706 BTU/hr
Input current calculated with 1 PSU; watts and
BTU/hour with 2 PSUs
VDX 6940 Safety Compliance
CAN/CSA C22.2 No. 60950-1-07 including A1 / UL 60950-1-07, Ed. 2 including A1
CAN/CSA-C22.2 No. 60950-1 Second Edition
EN 60950-1 Second Edition +A1/A12
IEC 60950-1 Second Edition +A1
GB 4943.1-2011 and GB9254-2008
CNS14336-1(99)
CSA/NRTL Certification
VDX 6940 EMC
FCC Class A
ICES-003 Class A
VCCI-Class A
CE
C-Tick
BSMI
KCC Class A
VDX 6940 Immunity
EN55024
VDX 6940 Environmental Regulatory Compliance
RoHS-6 (with lead exemption) Directive 2002/95/EC
NEBS-Compliant
VDX 6940 Standards Compliance
VDX 6940 products conform to the following Ethernet standards:
IEEE 802.1D Spanning Tree Protocol
IEEE 802.1s Multiple Spanning Tree
IEEE 802.1w Rapid Reconfiguration of Spanning Tree Protocol
IEEE 802.3 Ethernet
IEEE 802.3ad Link Aggregation with LACP
IEEE 802.3ae 10G Ethernet
IEEE 802.1Q VLAN Tagging
IEEE 802.1p Class of Service Prioritization and Tagging
IEEE 802.1v VLAN Classification by Protocol and Port
IEEE 802.1AB Link Layer Discovery Protocol (LLDP)
IEEE 802.3x Flow Control (Pause Frames)
IEEE 802.3ab 1000BASE-T
IEEE 802.3z 1000BASE-X
The following draft versions of the Data Center Bridging (DCB) and Fibre Channel over Ethernet (FCoE) standards are also supported on the VDX 6940
IEEE 802.1Qbb Priority-based Flow Control
IEEE 802.1Qaz Enhanced Transmission Selection
IEEE 802.1 DCB Capability Exchange Protocol (Proposed under the DCB Task Group of IEEE 802.1 Working Group)
FC-BB-5 FCoE (Rev 2.0)
VDX 6940 Support
RFC 768  User Datagram Protocol (UDP)
RFC 783 TFTP Protocol (revision 2)
RFC 791 Internet Protocol (IP)
RFC 792 Internet Control Message Protocol (ICMP)
RFC 793 Transmission Control Protocol (TCP)
RFC 826  ARP
RFC 854 Telnet Protocol Specification
RFC 894 A Standard for the Transmission of IP Datagram over Ethernet Networks
RFC 959 FTP
RFC 1027 Using ARP to Implement Transparent Subnet Gateways (Proxy ARP)
RFC 1112  IGMPv1
RFC 1157 Simple Network Management Protocol (SNMP) v1 and v2
RFC 1305 Network Time Protocol (NTP) Version 3
RFC 1492 TACACS+
RFC 1519 Classless Inter-Domain Routing (CIDR)
RFC 1584 Multicast Extensions to OSPF
RFC 1765 OSPF Database Overflow
RFC 1812 Requirements for IP Version 4 Routers
RFC 1997 BGP Communities Attribute
RFC 2068 HTTP Server
RFC 2131 Dynamic Host Configuration Protocol (DHCP)
RFC 2154 OSPF with Digital Signatures (Password, MD-5)
RFC 2236 IGMPv2
RFC 2267 Network Ingress Filtering
RFC 2328 OSPF v2
RFC 2370 OSPF Opaque Link-State Advertisement (LSA) Option—Partial Support
RFC 2375 IPv6 Multicast Address Assignments
RFC 2385  Protection of BGP Sessions with the TCP MD5 Signature Option
RFC 2439 BGP Route Flap Damping
RFC 2460 Internet Protocol, Version 6 (v6) Specification (on management interface)
RFC 2462  IPv6 Stateless Address Auto-Configuration
RFC 2464 Transmission of IPv6 Packets over Ethernet Networks (on management interface)
RFC 2474 Definition of the Differentiated Services Field in the IPv4 and IPv6 Headers
RFC 2571 An Architecture for Describing SNMP Management Frameworks
RFC 2711 IPv6 Router Alert Option
RFC 2865  Remote Authentication Dial-In User Service (RADIUS)
RFC 3101 The OSPF Not-So-Stubby Area (NSSA) Option
RFC 3137 OSPF Stub Router Advertisement
RFC 3176 sFlow
RFC 3392 Capabilities Advertisement with BGPv4
RFC 3411 An Architecture for Describing SNMP Frameworks
RFC 3412 Message Processing and Dispatching for the SNMP
RFC 3413 Simple Network Management Protocol (SNMP) Applications
RFC 3587 IPv6 Global Unicast Address Format
RFC 3623 Graceful OSPF Restart—IETF Tools
RFC 3768 VRRP
RFC 4271 BGPv4
RFC 4291 IPv6 Addressing Architecture
RFC 4292 IP Forwarding MIB
RFC 4293 Management Information Base for the Internet Protocol (IP)
RFC 4443 ICMPv6 (replaces 2463)
RFC 4456 BGP Route Reflection
RFC 4510 Lightweight Directory Access Protocol (LDAP): Technical Specification Road Map
RFC 4601 Protocol Independent Multicast—Sparse Mode (PIM-SM): Protocol Specification (Revised)
RFC 4724 Graceful Restart Mechanism for BGP
RFC 4861 IPv6 Neighbor Discovery
RFC 4893 BGP Support for Four-Octet AS Number Space
RFC 5082 Generalized TTL Security Mechanism (GTSM)
RFC 5880 Bidirectional Forwarding Detection (BFD)
RFC 5881 Bidirectional Forwarding Detection (BFD) for IPv4 and IPv6 (Single Hop)
RFC 5882 Generic Application of Bidirectional Forwarding Detection (BFD)
RFC 5883 Bidirectional Forwarding Detection (BFD) for Multihop Paths
RFC 5942 IPv6 Neighbor Discovery
RFC 7432 BGP-EVPN—Network Virtualization Using VXLAN Data Plane
IPv6 Routing  
RFC 2545 Use of BGP-MP Extensions for IPv6
RFC 2740 OSPFv3 for IPv6
IPv6 Multicast  
RFC 2710 Multicast Listener Discovery (MLD) for IPv6
VDX 6940 OS Software Capabilities
    VCS Fabrics IP Fabrics
Software scalability Maximum switches in a fabric 48 Unlimited
  Maximum ECMP paths in a fabric 32 32
  Maximum LAGs in a fabric 2,000 144
Layer 2 switching Service Node Load Balancing BFD/ARP Optimizations X X
  Conversational MAC Learning X X
  Virtual Link Aggregation Group (vLAG) spanning X X
  Layer 2 Access Control Lists (ACLs) X X
  Supports 2K ingress and egress ACLs X X
  Edge Loop Detection (ELD) X X
  Address Resolution Protocol (ARP) RFC 826 X X
  Private VLANs X  
  Maintenance Mode/Graceful Traffic Diversion X  
  Distributed VXLAN Gateway X  
  Diagnostic Ports X  
  IP Maps Support X  
  L2 Loop prevention in an overlay environment   X
  High availability/In-Service Software Upgrade—hardware-enabled X X
  IGMP snooping support for multicast flooding X X
  IGMPv1/v2 Snooping X X
  IGMPv1/v2 Snooping X X
  IGMPv3 X X
  MAC Learning and Aging X X
  Link Aggregation Control Protocol (LACP) IEEE 802.3ad/802.1AX X X
  Virtual Local Area Networks (VLANs) X X
  VLAN Encapsulation 802.1Q X X
  Per-VLAN Spanning Tree (PVST+/PVRST+) X X
  Rapid Spanning Tree Protocol (RSTP) 802.1w X X
  Multiple Spanning Tree Protocol (MSTP) 802.1s X X
  STP PortFast, BPDU Guard, BPDU Filter  X X
  STP Root Guard  X X
  Pause Frames 802.3x  X X
  Static MAC Configuration 

 
X X
  Uni-Directional Link Detection (UDLD) X X
  Uplink switch for Extreme VDX switches, Extreme VCS fabrics, and the Extreme VCS Virtual Fabric feature X  
  Transparent LAN Services 
 
X  
  L2 Traceroute for VXLAN X X
  BUM Storm Control X X
Layer 3 switching Border Gateway Protocol (BGP4+) X X
  DHCP Helper X X
  Layer 3 ACLs X X
  Multicast: PIM-SM, IGMPv2 X X
  OSPF v2/v3 X X
  Static routes X X
  IPv4/v6 ACL X X
  IPv4/v6 ACL X X
  Policy-Based Routing (PBR) X X
  Bidirectional Forwarding Detection (BFD) X X
  32-Way ECMP X X
  VRF Lite X X
  VRF-aware OSPF, BGP, VRRP, static routes X X
  VRRP v2 and v3 X X
  uRPF for IPv4 and IPv6 X  
  IPv4/IPv6 dual stack X X
  IPv6 ACL packet filtering X X
  BGP automatic neighbor discovery for IP fabric   X
  BGP Additional-Path X X
  BGP-Allow AS X X
  BGP Generalized TTL Security Mechanism (GTSM) X X
  BGP graceful shutdown for maintenance mode   X
  BGP Peer Auto Shutdown X X
  Multicast Refactoring X X
  IPv6 routing X X
  OSPF Type-3 LSA Filter X X
  Wire-speed routing for IPv4 and IPv6 using any routing protocol X X
  BGP-EVPN Control Plane Signaling RFC 7432   X
  BGP-EVPN VXLAN Standard-based Overlay   X
  Multi-VRF X X
  IP Unnumbered Interface   X
  Intersubnet Routing (Symmetric and Asymmetric)   X
  IP over Port Channel   X
  VRRP-E X X
  Fabric Virtual Gateway X X
  Static Anycast Gateway   X
  ARP Suppression   X
Automation and programmability OpenFlow 1.3 X X
  REST API with YANG data model X X
  Puppet X X
  Python X X
  PyNOS libraries X X
  VMware vRealize plugins X X
  DHCP automatic fabric provisioning X X
  Netconf API X X
Mulititenancy and virtualization TRILL FGL-based VCS Virtual Fabric feature X  
  Virtual fabric extension X  
  VM-Aware Network Automation X  
  BFD for virtual fabric extension X  
  Automatic Migration of Port Profiles (AMPP) X X
DCB Priority-based Flow Control (PFC) 802.1Qbb X  
  Enhanced Transmission Selection (ETS) 802.1Qaz X  
  Manual configuration of lossless queues for protocols other than FCoE and iSCSI X  
  Data Center Bridging Exchange (DCBX) X  
  DCBX Application Type-Length-Value (TLV) for FCoE and iSCSI X  
IP storage Inter-Switch Link (ISL) X  
  Deep on-chip packet buffer
VDX 6940 Hardware Ordering Information
BR-VDX6940-36Q-AC-F VDX 6940-36Q base system with 36 40 GbE QSFP+ ports, AC power supply, non-port-side
exhaust airflow
BR-VDX6940-36Q-AC-R VDX 6940-36Q base system with 36 40 GbE QSFP+ ports, AC power supply, port-side
exhaust airflow
BR-VDX6940-24Q-DC-F VDX 6940-36Q base system with 24 40 GbE QSFP+ ports, DC power supply, non-port-side
exhaust airflow
BR-VDX6940-24Q-DC-R VDX 6940-36Q base system with 24 40 GbE QSFP+ ports, DC power supply, port-side
exhaust airflow
BR-VDX6940-24Q-AC-F VDX 6940-36Q base system with 24 40 GbE QSFP+ ports, AC power supply, non-port-side
exhaust airflow
BR-VDX6940-24Q-AC-R VDX 6940-36Q base system with 24 40 GbE QSFP+ ports, AC power supply, port-side
exhaust airflow
BR-VDX6940-64S-AC-R VDX 6940-144S base system with 64 10 GbE SFP+ ports, AC power supply, port-side
exhaust airflow
BR-VDX6940-64S-AC-F VDX 6940-144S base system with 64 10 GbE SFP+ ports, AC power supply, non-port-side
exhaust airflow
BR-VDX6940-96S-AC-R VDX 6940-144S base system with 96 10 GbE SFP+ ports, AC power supply, port-side
exhaust airflow
BR-VDX6940-96S-AC-F VDX 6940-144S base system with 96 10 GbE SFP+ ports, AC power supply, non-port-side
exhaust airflow
BR-VDX6940-144S-AC-R VDX 6940-144S base system with 96 10 GbE SFP+ ports and up to 12 40 GbE QSFP+ ports or
up to 4 100 GbE QSFP28 ports, AC power supply, port-side exhaust airflow
BR-VDX6940-144S-AC-F VDX 6940-144S base system with 96 10 GbE SFP+ ports and up to 12 40 GbE QSFP+ ports or
up to 4 100 GbE QSFP28 ports, AC power supply, non-port-side exhaust airflow
BR-VDX6940-64S-DC-F VDX 6940-144S base system with 64 10 GbE SFP+ ports, DC power supply, non-port-side
exhaust airflow
BR-VDX6940-64S-DC-R VDX 6940-144S base system with 64 10 GbE SFP+ ports, DC power supply, port-side
exhaust airflow

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