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Fabric Switches Pack Massive Capability into a Small Footprint

Scale out your data center environments with huge capacity and compelling economic benefits. Enable connection with top-of-rack switches or directly to servers. Include automation that lets you add switches network-wide without manual configuration. Then top it off with exceptional application performance.

Extreme Data Center Fabric Technologies

  • Address network needs with a choice of architectures
  • Get simple scalability for L2 and expansive scalability for large L3 deployments
  • Use resilient, elastic, self-forming, and self-healing fabrics
  • Centrally manage all VDX switches  as a single logical element
  • Deliver low latency and efficiency with load-balanced multipathing at Layers 1,2, 3
  • Enable seamless agility, security, and micro-segmentation with Extreme IP Fabric and Extreme VCS Fabric Gateways for VMware NSX network virtualization
  • Deliver advanced storage networking with improved performance, management, security, span of control and connectivity for FCoE, iSCSI, NAS

Automation and Programmability

  • Scale out fabrics without complexity with automatic fabric provisioning and network virtualization
  • Enable cloud-like agility and rapid innovation through open interfaces: Puppet, Ansible, VMware vRealize plugins, REST and Netconf APIs
  • Improve programmability with faster, more elegant integration with in-house and third-party management and orchestration tools
  • Easily orchestrate fabric services through the OpenStack and OpenDaylight-based SDN Controller
  • Provide a choice of multitenant solutions using Virtual Fabrics for tenant isolation within a data center and across data centers
  • Reduce maintenance costs and gain high availability through automated service and resource upgrades

Two high-density models support spine and leaf applications

  • The 6940-36Q is a 40 GbE, 1U switch primarily designed for spine applications, but very capable in a leaf deployment
  • The 6940-144S is a 2U switch that provides 96 fixed 10 Gb ports for demanding leaf applications
  • Support more than 10,000 servers using VCS multi-fabrics with overlays and 500,000 servers with IP Fabrics

Optimized for performance and scale

  • 24 MB buffers deliver line-rate performance for all packet sizes on all ports
  • 800 ns port-to-port latency supports speedy data transmission with a minimum of dropped packets
  • Wire-speed switching across all ports and all packet sizes
  • Auto-trunking Inter-Switch Links (ISLs) in VCS Fabrics
  • Non-disruptive scaling

 

DHCP Automatic Fabric Provisioning

Configure a new switch simply by plugging it in. Thanks to Extreme VCS fabric technologies, power and a network connection are all you need. The switch immediately becomes part of the network fabric, automatically provisioned and centrally managed

Better Performance for Large Infrastructures

Infrastructures with extensive traffic require lots of switch ports. And the VDX 6940 is an undisputed industry leader, with the market’s highest 10 GbE and 40 GbE port density in a fixed form factor switch. And with line rate throughput across all ports, you gain better application performance during bursty traffic

Balanced Design Improves User Experience

Moving traffic quickly across the network and ensuring ideal application performance requires unique switch characteristics. The VDX 6940 boasts a uniquely optimized packet buffer and latency that addresses both challenges. Outstanding throughput and performance, end to end.

Small Footprint Means More for Less

The VDX 6940 capabilities easily measure up to or surpass chassis offerings from competing vendors. But its size doesn’t. The small, rack-mounted design means a lower purchase cost and ongoing operational efficiencies such as reduced power, cooling and space requirements.

Programability: A Gift To Productivity

The days of manually configuring individual switches are over. The VCS Fabric, IP Fabric, APIs, and scripting tools let you automate switch feature implementation across the network. And those scripts live on, through operating system upgrades, personnel changes, and more. Greater operational efficiency, ongoing ROI

VDX 6940 Feature Overview
VDX 6940- 36QVDX 6940-144S
Form Factor1U2U
Switching bandwidth (data rate, full duplex)2.88 Tbps2.88 Tbps
Switch performance2.16 Bpps2.16 Bpps
Port-to-port latency800 ns800 ns
Dimensions and weightWidth: 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 mediaWeight: 15.46 kg (34.1 lb) empty; 17.32 kg (38.2 lb) with media
10 GbE SFP+ ports144 10 GbE ports using breakout cables96 fixed 10 GbE ports and additional 48 10 GbE ports with breakout cables
1 GbE SFP096
1/10 GBASE-T00
40 GbE QSFP+3612
100 GbE QSFP2804
40 GbE Ports on Demand (PoD)24, 366, 12
10 GbE Ports on Demand (PoD)N/A64, 80, 96
Power SuppliesTwo internal, redundant, field-replaceable, load-sharing AC/DC power suppliesTwo internal, redundant, field-replaceable, load-sharing AC/DC power supplies
Cooling fans5 field-replaceable fans (FRUs); each fan FRU has 2 fans4 field-replaceable fans (FRUs); each fan FRU has 1 fan
AirflowRear-to-front or front-to-rear airflowRear-to-front or front-to-rear airflow
VDX 6940 Scalability Information
Connector OptionsOut-of-band
Ethernet management: RJ45 (fixed)
Console management: RJ45 to RS-232 (fixed)Firmware and diagnostic: USB
Maximum VLANs4,096
Maximum MAC addresses112,000 (L2 MACs); fabric-wide 256,000 (CML)
Maximum port profiles (AMPP)512
Maximum members in a standard LAG16
Maximum per-port priority pause level8
Maximum switches that a vLAG can span8
Maximum members in a vLAG64
Maximum jumbo frame size9,216 bytes
Queues per port8
DCB Priority Flow Control (PFC) classes8
Maximum ACLs10,000
Maximum ARP entries84,000
Maximum IPv4 unicast routes12,000
Maximum IPv6 unicast routes3,000
HA/ISSUISSU fully supported
VDX 6940 Mechanical
EnclosureFront-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
TemperatureOperating: 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)
HumidityOperating: 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)
AltitudeOperating: 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.)
ShockOperating: 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
VibrationOperating: 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
AirflowMaximum: 159 CMH (94 CFM)Minimum: 65 CMH (38 CFM)Maximum: 370 CMH (218 CFM)
Minimum: 95 CMH (56 CFM)
VDX 6940 Power
Power suppliesTwo internal, redundant, field-replaceable, load-sharing power suppliesTwo internal, redundant, field-replaceable, load-sharing power supplies
Power inletC13C13
Input voltage100 to 240 V or 48 V DC100 to 240 V or 48 V DC
Input line frequency50 to 60 Hz50 to 60 Hz
Inrush current30 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 ms40 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 current6 A at 100 VAC
7 A at 90 VAC
6 A at 100 VAC
7 A at 85 VAC
Typical power consumptionAt 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 consumptionAt 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 783TFTP Protocol (revision 2)
RFC 791Internet 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 2328OSPF 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 2571An Architecture for Describing SNMP Management Frameworks
RFC 2711 IPv6 Router Alert Option
RFC 2865
Remote Authentication Dial-In User Service (RADIUS)
RFC 3101The OSPF Not-So-Stubby Area (NSSA) Option
RFC 3137OSPF 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 3768VRRP
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 4456BGP Route Reflection
RFC 4510Lightweight Directory Access Protocol (LDAP): Technical Specification Road Map
RFC 4601Protocol 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 5082Generalized 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 5883Bidirectional 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 FabricsIP Fabrics
Software scalabilityMaximum switches in a fabric48 Unlimited
Maximum ECMP paths in a fabric3232
Maximum LAGs in a fabric2,000 144
Layer 2 switchingService Node Load Balancing BFD/ARP Optimizations XX
Conversational MAC Learning XX
Virtual Link Aggregation Group (vLAG) spanningXX
Layer 2 Access Control Lists (ACLs) XX
Supports 2K ingress and egress ACLs XX
Edge Loop Detection (ELD) XX
Address Resolution Protocol (ARP) RFC 826 XX
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 XX
IGMP snooping support for multicast flooding XX
IGMPv1/v2 SnoopingXX
IGMPv1/v2 SnoopingXX
IGMPv3 XX
MAC Learning and AgingXX
Link Aggregation Control Protocol (LACP) IEEE 802.3ad/802.1AXXX
Virtual Local Area Networks (VLANs) XX
VLAN Encapsulation 802.1Q XX
Per-VLAN Spanning Tree (PVST+/PVRST+) XX
Rapid Spanning Tree Protocol (RSTP) 802.1w XX
Multiple Spanning Tree Protocol (MSTP) 802.1s XX
STP PortFast, BPDU Guard, BPDU Filter
XX
STP Root Guard
XX
Pause Frames 802.3x
XX
Static MAC Configuration


XX
Uni-Directional Link Detection (UDLD) XX
Uplink switch for Extreme VDX switches, Extreme VCS fabrics, and the Extreme VCS Virtual Fabric featureX
Transparent LAN Services

X
L2 Traceroute for VXLAN XX
BUM Storm Control
XX
Layer 3 switchingBorder Gateway Protocol (BGP4+)XX
DHCP HelperX
X
Layer 3 ACLsX
X
Multicast: PIM-SM, IGMPv2X
X
OSPF v2/v3X
X
Static routesX
X
IPv4/v6 ACLX
X
IPv4/v6 ACLX
X
Policy-Based Routing (PBR)X
X
Bidirectional Forwarding Detection (BFD)X
X
32-Way ECMP X
X
VRF LiteX
X
VRF-aware OSPF, BGP, VRRP, static routesX
X
VRRP v2 and v3 X
X
uRPF for IPv4 and IPv6X
IPv4/IPv6 dual stackX
X
IPv6 ACL packet filteringX
X
BGP automatic neighbor discovery for IP fabricX
BGP Additional-PathX
X
BGP-Allow ASX
X
BGP Generalized TTL Security Mechanism (GTSM)X
X
BGP graceful shutdown for maintenance modeX
BGP Peer Auto ShutdownX
X
Multicast RefactoringX
X
IPv6 routingX
X
OSPF Type-3 LSA FilterX
X
Wire-speed routing for IPv4 and IPv6 using any routing protocolX
X
BGP-EVPN Control Plane Signaling RFC 7432X
BGP-EVPN VXLAN Standard-based OverlayX
Multi-VRFX
X
IP Unnumbered InterfaceX
Intersubnet Routing (Symmetric and Asymmetric)X
IP over Port ChannelX
VRRP-EX
X
Fabric Virtual GatewayX
X
Static Anycast GatewayX
ARP SuppressionX
Automation and programmabilityOpenFlow 1.3X
X
REST API with YANG data modelX
X
PuppetX
X
PythonX
X
PyNOS librariesX
X
VMware vRealize pluginsX
X
DHCP automatic fabric provisioningX
X
Netconf APIX
X
Mulititenancy and virtualizationTRILL FGL-based VCS Virtual Fabric featureX
Virtual fabric extensionX
VM-Aware Network AutomationX
BFD for virtual fabric extensionX
Automatic Migration of Port Profiles (AMPP)X
X
DCBPriority-based Flow Control (PFC) 802.1QbbX
Enhanced Transmission Selection (ETS) 802.1QazX
Manual configuration of lossless queues for protocols other than FCoE and iSCSIX
Data Center Bridging Exchange (DCBX)X
DCBX Application Type-Length-Value (TLV) for FCoE and iSCSI X
IP storageInter-Switch Link (ISL)X
Deep on-chip packet bufferX
X
Auto QoS for NASX
X
VCS fabric auto forming/auto healingX
X
Fibre Channel/FCoEMulti-hop Fibre Channel over Ethernet (FCoE); requires Extreme VCS Fabric technologyX
FC-BB5 compliant Fibre Channel Forwarder (FCF)X
Native FCoE forwardingX
FCoE to Fibre Channel BridgingX
FCoE on Extreme VDX 8770X
FCoE on QSFP+ portX
Multi-hop Access Gateway SupportX
End-to-end FCoE (initiator to target)X
FCoE Initialization Protocol (FIP) v1 support for FCoE device login and initializationX
Name Server-based zoningX
Supports connectivity to FIP Snooping Bridge (FSB) deviceX
FCoE traffic over standard LAGX
Interface BindingX
Dual Personality PortsX
Logical SANsX
High availabilityISSU L2 and L3X
X
BFDX
X
OSPF3-NSRX
X
BGP4-GRX
X
Management Module FailoverX
X
Quality of Service
(QoS)
ACL-based QoSXX
Eight priority levels for QoSXX
Class of Service (CoS) IEEE 802.1pXX
DSCP TrustXX
DSCP to Traffic Class MutationXX
DSCP to CoS MutationXX
DSCP to DSCP MutationXX
Random Early DiscardXX
Per-port QoS configurationXX
ACL-based Rate LimitXX
Dual-rate, three-color token bucketXX
ACL-based remarking of CoS/DSCP/PrecedenceXX
ACL-based sFlowXX
Scheduling: Strict Priority (SP), Deficit Weighted Round-Robin (DWRR), Hybrid
Scheduling (Hybrid)
XX
Queue-based ShapingXX
Flow-based QoSXX
Management and
monitoring
Logical chassis managementX
IPv4/IPv6 managementXX
Industry-standard Command Line Interface (CLI)XX
Netconf APIXX
REST API with YANG data modelXX
Extreme VDX Plugin for OpenStackXX
Link Layer Discovery Protocol (LLDP) IEEE 802.1ABXX
MIB II RFC 1213 MIBXX
Switch BeaconingXX
Management VRFXX
Switched Port Analyzer (SPAN)XX
TelnetXX
SNMP v1, v2C, v3XX
sFlow RFC 3176XX
Out-of-band management XX
Remote SPAN (RSPAN)XX
RMON-1, RMON-2XX
NTPXX
Management Access Control Lists (ACLs)XX
Role-Based Access Control (RBAC)XX
Range CLI supportXX
UDLDXX
OpenStack Neutron ML2 pluginXX
Python XX
Puppet XX
Distributed Configuration ManagementX
Maps switch health monitoringX
SecurityPort-based Network Access Control 802.1XXX
RADIUS (AAA)XX
TACACS+XX
Secure Shell (SSHv2)X
BPDU Drop X X
XX
Lightweight Directory Access Protocol (LDAP)XX
Secure Copy ProtocolXX
Port Security XX
VDX 6940 Hardware Ordering Information
BR-VDX6940-36Q-AC-FVDX 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-RVDX 6940-36Q base system with 24 40 GbE QSFP+ ports, DC power supply, port-side
exhaust airflow
BR-VDX6940-24Q-AC-FVDX 6940-36Q base system with 24 40 GbE QSFP+ ports, AC power supply, non-port-side
exhaust airflow
BR-VDX6940-24Q-AC-RVDX 6940-36Q base system with 24 40 GbE QSFP+ ports, AC power supply, port-side
exhaust airflow
BR-VDX6940-64S-AC-RVDX 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-RVDX 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-RVDX 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