VDX 6740 Switch
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Architectural Flexibility

  • Deploy in Layer 2 or Layer 3 fabrics for flexibility and investment protection
  • Leverage existing wiring infrastructure while moving to a higher bandwidth, from 1000BASE-T to 10GBASE-T
  • Provide a choice of multitenant solutions using Virtual Fabrics for tenant isolation within a data center and across data centers
  • Deliver advanced storage networking with improved performance, management, security, span of control and connectivity for FCoE, iSCSI and NAS

High-capacity Ports and Buffers

  • 1000BASE-T, 10G BASE-T ports, 40 GbE uplink ports, and 24 MB deep buffers
  • Aggregate high bandwidth traffic
  • Deliver low-latency support for east-west traffic with per-packet load balancing at Layers 1, 2, and 3

Simplify Management with Embedded Automation

  • Scale out the fabric without adding complexity
  • Save time and resources with elastic, self-forming, and self-healing fabrics
  • Centrally manage all VDX switches as a single logical element

High Performance Plus Low Latency

Support virtualized data centers, reduce network congestion, and meet demanding application performance requirements. The Extreme VDX 6740 offers wire speed and non-blocking packet forwarding to meet the capacity requirements of 1/10/40GbE servers and storage.

Simplicity with Embedded Automation

Streamline configuration and management, and maximize efficiency with capabilities including scalable multitenancy, unification of virtual and physical environments, support for layer 3 gateways, and automated storage traffic prioritization.

Flexibility and Resiliency

Create a resilient and flexible network that adapts to changing traffic patterns. Extreme data center fabric technology helps maximize network bandwidth and allows for immediate discovery and recovery across all networking nodes.

VDX 6740 Feature Overview
VDX 6740VDX 6740TVDX 6740T-1G
Form Factor1U1U1U
Switching bandwidth (data rate, full duplex)1.28 Tbps1.28 Tbps1.28 Tbps
Switch performance960 Mpps960 Mpps960 Mpps
Port-to-port latency850 ns3 μs3 μs
Dimensions and weightWidth: 43.99 cm (17.32 in.)Width: 43.74 cm (17.22 in.)Width: 43.74 cm (17.22 in.)
Height: 4.32 cm (1.75 in.)Height: 4.27 cm (1.68 in.)Height: 4.27 cm (1.68 in.)
Depth: 40.99 cm (16.14 in.)Depth: 53.65 cm (21.12 in.)Depth: 53.65 cm (21.12 in.)
Weight: 8.66 kg (19.1 lb)Weight: 10.82 kg (23.85 lbWeight: 10.82 kg (23.85 lb
10 GbE SFP+ portsUp to 64Up to 16Up to 16
162/4/8/16 Gbps Fibre Channel Flex PortsUp to 32 (out of 64 10 GbE ports)Port types supported: E_Port (connecting to EX_Port only), F_Port, N_Port (Access Gateway mode)00
1/10 GBASE-T04848
40 GbE QSFP+ (10 GbE breakout cable)444
10 GbE Ports on Demand (PoD)24, 32, 40, 48, 56, 6424, 32, 40, 48, 56, 64N/A
10 GbE Capacity on Demand (CoD)N/AN/A16, 32, 48
Power suppliesTwo hot-swappable, load-sharingTwo hot-swappable, load-sharingTwo hot-swappable, load-sharing
Cooling fansN+1 redundant, integrated into power suppliesN+1 redundant, integrated into power suppliesN+1 redundant, five hot-swappable fan units
AirflowFront to back
Back to front
Front to back
Back to front
Front to back
Back to front
VDX 6740 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 addresses160,000
Maximum port profiles (AMPP)1,024
Maximum members in a standard LAG64
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 ACLs13,000
Maximum ARP entries32,000
Maximum IPv4 unicast routes12,000
Maximum IPv6 unicast routes3,000
HA/ISSUISSU fully supported
VDX 6740 Mechanical
EnclosureFront-to-rear, rear-to-front airflow; 1U, 19-inch EIA-compliant; power from non-port side
VDX 6740 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)
HumidityOperating: 10% to 85% non-condensing
Non-operating and storage: 10% to 90% non-condensing
AltitudeOperating: Up to 3,048 meters (10,000 feet)
Non-operating and storage: Up to 12 kilometers (39,370 feet)
ShockOperating: 20 G, 11 ms half-sine
Non-operating and storage: Square wave, 44 G, 15 ms
VibrationOperating: 0.5 G peak, 0.7 G ms random, 5 to 500 Hz
Non-operating and storage: 2.0 g sine, 1.4 G rms random, 5 to 500 Hz
AirflowVDX 6740T port-side-intake: Maximum: 49.3 CFM; Nominal: 26.3 CFMB
VDX 6740T port-side-exhaust: Maximum: 51.9 CFM; Nominal: 27.3 CFM
VDX 6740 port-side-intake and port-side-exhaust: Maximum: 25.7 CFM; Nominal: 11.5 CFM
Heat dissipation1,672.41 BTU/hr
VDX 6740 Power
Power suppliesTwo internal, redundant, field-replaceable, load-sharing AC power supplies
Power inletC13
Input voltage85 to 264 VAC nominal
Input line frequency50 to 60 Hz
Inrush currentLimited to 30 A peak at 240 VAC during cold startup at 25°C ambient
Maximum current6 A max at 100 VAC/60 Hz
Maximum power consumptionVDX 6740: 110 W
VDX 6740T: 460 W
VDX 6740T-1G: 276 W (Base SKU)
VDX 6740 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
VDX 6740 EMC
FCC Class A
ICES-003 Class A
VCCI-Class A
KCC Class A
VDX 6740 Immunity
ANSI C63.4
ICES-003 Class A
CISPR22 and JEIDA (Harmonics)
EN55022 Class A and EN55024
CNS 13438(95)
51318.22-99 and 51318.24-99
KN22 and KN24
VDX 6740 Environmental Regulatory Compliance
RoHS-6 (with lead exemption) Directive 2002/95/EC
VDX 6740 Standards Compliance
VDX 6740 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 6740:
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)
The VDX 6740 products conform to the following Fibre Channel standards:
FC-GS-5 ANSI INCITS 427:2007 (includes the following) –FC-GS-4 ANSI INCITS 387: 2004
FC-SP-2 INCITS 496-2012(AUTH-A, AUTH-B1 only)
FC-DA INCITS TR-36: 2004 (includes the following) –FC-FLA INCITS TR-20: 1998–FC-PLDA INCIT S TR-19: 1998
FC-PI INCITS 352: 2002
FC-PI-2 INCITS 404: 2005
FC-PI-4 INCITS 1647-D, revision 7.1 (under development)
FC-FS-2 ANSI/INCITS 424:2006 (includes the following) –FC-FS INCITS 373: 2003
FC-LS INCITS 433: 2007
VDX 6740 RFC 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
RFC 854 Telnet Protocol Specification
RFC 894
A Standard for the Transmission of IP Datagram over Ethernet Networks
RFC 1027 Using ARP to Implement Transparent Subnet Gateways (Proxy ARP)
RFC 1112
RFC 1157 Simple Network Management Protocol (SNMP) v1 and v2
RFC 1305 Network Time Protocol (NTP) Version 3
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
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 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
RFC 5798 VRRP Version 3 for IPv4 and IPv6
VDX 6740 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 Unlimited
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
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
STP Root Guard
Pause Frames 802.3x
Static MAC Configuration

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

L2 Traceroute for VXLAN XX
BUM Storm Control
Layer 3 switchingBorder Gateway Protocol (BGP4+)XX
DHCP HelperX
Layer 3 ACLsX
Multicast: PIM-SM, IGMPv2X
OSPF v2/v3X
Static routesX
IPv4/v6 ACLX
IPv4/v6 ACLX
Policy-Based Routing (PBR)X
Bidirectional Forwarding Detection (BFD)X
32-Way ECMP X
VRF-aware OSPF, BGP, VRRP, static routesX
VRRP v2 and v3 X
uRPF for IPv4 and IPv6X
IPv4/IPv6 dual stackX
IPv6 ACL packet filteringX
BGP automatic neighbor discovery for IP fabricX
BGP Additional-PathX
BGP Generalized TTL Security Mechanism (GTSM)X
BGP graceful shutdown for maintenance modeX
BGP Peer Auto ShutdownX
Multicast RefactoringX
IPv6 routingX
OSPF Type-3 LSA FilterX
Wire-speed routing for IPv4 and IPv6 using any routing protocolX
BGP-EVPN Control Plane Signaling RFC 7432X
BGP-EVPN VXLAN Standard-based OverlayX
IP Unnumbered InterfaceX
Intersubnet Routing (Symmetric and Asymmetric)X
IP over Port ChannelX
Fabric Virtual GatewayX
Static Anycast GatewayX
ARP SuppressionX
Automation and programmabilityOpenFlow 1.3X
REST API with YANG data modelX
PyNOS librariesX
VMware vRealize pluginsX
DHCP automatic fabric provisioningX
Netconf APIX
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
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
Fibre Channel/FCoEMulti-hop Fibre Channel over Ethernet (FCoE); requires VCS Fabric technologyX
FC-BB5 compliant Fibre Channel Forwarder (FCF)X
Native FCoE forwardingX
FCoE to Fibre Channel BridgingX
FCoE on 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
Management Module FailoverX
Quality of Service
ACL-based QoSXX
Eight priority levels for QoSXX
Class of Service (CoS) IEEE 802.1pXX
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)
Queue-based ShapingXX
Flow-based QoSXX
Management and
Logical chassis managementX
IPv4/IPv6 managementXX
Industry-standard Command Line Interface (CLI)XX
Netconf APIXX
REST API with YANG data modelXX
VDX Plugin for OpenStackXX
Link Layer Discovery Protocol (LLDP) IEEE 802.1ABXX
Switch BeaconingXX
Management VRFXX
Switched Port Analyzer (SPAN)XX
SNMP v1, v2C, v3XX
sFlow RFC 3176XX
Out-of-band management XX
Management Access Control Lists (ACLs)XX
Role-Based Access Control (RBAC)XX
Range CLI supportXX
OpenStack Neutron ML2 pluginXX
Python XX
Puppet XX
Distributed Configuration ManagementX
Maps switch health monitoringX
SecurityPort-based Network Access Control 802.1XXX
Secure Shell (SSHv2)X
Lightweight Directory Access Protocol (LDAP)XX
Secure Copy ProtocolXX
Port Security XX
VDX 6740 Hardware Ordering Information
BR-VDX6740-24-FVDX 6740, 24P SFP+ ports only—no optics, AC, non-port-side exhaust airflow
BR-VDX6740-24-RVDX 6740, 24P SFP+ ports only—no optics, AC, port-side exhaust airflow
BR-VDX6740-48-FVDX 6740, 48P SFP+ ports only—no optics, AC, non-port-side exhaust airflow
BR-VDX6740-48-RVDX 6740, 48P SFP+ ports only—no optics, AC, port-side exhaust airflow
BR-VDX6740-64-F VDX 6740, 64P SFP+ ports only—no optics, AC, non-port-side exhaust airflow
BR-VDX6740-64-R VDX 6740, 64P SFP+ ports only—no optics, AC, port-side exhaust airflow
BR-VDX6740-64-ALLSW-FVDX 6740, 64P SFP+ ports only—no optics, AC, FCoE, VCS fabric, non-port-side exhaust airflow
BR-VDX6740-64-ALLSW-RVDX 6740, 64P SFP+ ports only—no optics, AC, FCoE, VCS fabric, port-side exhaust airflow
BR-VDX6740T-24-FVDX 6740T, 24P 10GBASE-T ports only—no optics, AC, non-port-side exhaust airflow
BR-VDX6740T-24-RVDX 6740T, 24P 10GBASE-T ports only—no optics, AC, port-side exhaust airflow
BR-VDX6740T-48-FVDX 6740T, 48P 10GBASE-T ports only—no optics, AC, non-port-side exhaust airflow
BR-VDX6740T-48-RVDX 6740T, 48P 10GBASE-T ports only—no optics, AC, port-side exhaust airflow
BR-VDX6740T-64-FVDX 6740T, 48P 10GBASE-T and 4 SFP+ ports only—no optics, AC, non-port-side exhaust airflow
BR-VDX6740T-64-RVDX 6740T, 48P 10GBASE-T and 4 SFP+ ports only—no optics, AC, port-side exhaust airflow
BR-VDX6740T-64-ALLSW-F VDX 6740T, 48P 10GBASE-T and 4 SFP+ ports only—no optics, AC, FCoE, VCS fabric, non-port-side exhaust airflow
BR-VDX6740T-64-ALLSW-RVDX 6740T, 48P 10GBASE-T and 4 SFP+ ports only—no optics, AC, FCoE, VCS fabric, port-side exhaust airflow
BR-VDX6740T-56-1G-FVDX 6740T-1G, 48P 1000BASE-T and 2 40 GbE QSFP+ ports, upgradable to 10GBASE-T via license only—no optics, AC, non-port-side exhaust airflow
BR-VDX6740T-56-1G-RVDX 6740T-1G, 48P 1000BASE-T and 2 40 GbE QSFP+ ports, upgradable to 10GBASE-T via license only—no optics, AC, port-side exhaust airflow
BR-VDX6740-8x10G-POD8-port PoD license for VDX 6740 and 6740T
BR-VDX6740-2x40G-POD2-port 40 GbE PoD license for VDX 6740 and 6740T
BR-VDX6740T-1G-16X10G-COD16-port 1 GbE to 10 GbE Capacity on Demand (CoD) upgrade license for VDX 6740T-1G
VDX 6740 Software License Ordering Information
BR-VDX6740-FCoESoftware, FCoE license for VDX 6740 and 6740T
BR-VDX6740-VCSSoftware, VCS license for VDX 6740 and 6740T
BR-VDX6740-ALLSWSoftware, VCS and FCoE license for VDX 6740 and 6740T
XBR-250WPSAC-FFRU 250 W AC power supply/fan, non-port-side exhaust airflow, VDX 6740
XBR-250WPSAC-RFRU 250 W AC power supply/fan, port-side exhaust airflow, VDX 6740
XBR-500WPSAC-01-FFRU 500 W AC power supply/fan, non-port-side exhaust airflow, VDX 6740T, 6740T-1G
XBR-500WPSAC-01-RFRU 500 W AC power supply/fan, port-side exhaust airflow, VDX 6740T, 6740T-1G
XBR-AC-FAN-FAC fan, non-port-side exhaust airflow, VDX 6740T, 6740T-1G
XBR-AC-FAN-RAC fan, port-side exhaust airflow, VDX 6740T, 6740T-1G
XBR-R000291FRU, VDX 6740 fixed rack-mount kit for 4-post racks
XBR-R000292FRU, VDX 6740 mid-mount kit for 2-post racks
XBR-R000293Flush-mount kit for 2-post racks for VDX 6740
XBR-R000294FRU, universal 2-post mid-mount kit/flush-mount kit, VDX 6740T/6740T-1G
XBR-R000295FRU, universal rack-mount kit, 4-post, 24- to 32-inch depth rack, VDX 6740T/6740T-1G
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