Specifications

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Optimizing East-West Trac
Traditional data centers are architected with a rigid, three-
tier tree topology optimized for the north-south trac flow
of client-server computing environments, compromising
performance, increasing latency, and creating bottlenecks.
With the increased prevalence of virtualization and
distributed applications, data center network trac is now
predominantly east-west, or server-server. Extreme data
center fabrics were designed and optimized to address
these trac patterns by moving trac through any of the
active paths and avoiding the multiple hops required in
other tiered topologies.
In-Service Software Upgrade
The VDX 6940 delivers a highly ecient In-Service
Software Upgrade (ISSU) by leveraging a software model
that uses a dual-OS infrastructure on a multi-core CPU. This
enables data center administrators to deliver enterprise-
class business continuity on fixed switches during a
software upgrade/downgrade process. This software
change process is non-disruptive to Layer 2, Layer 3, Fibre
Channel, and Fibre Channel over Ethernet (FCoE) trac.
Moreover, the ISSU implementation is hardware-optimized,
thus reducing the time it takes to complete the upgrade/
downgrade process.
Advanced Storage Support
VDX 6940 switches provide advanced storage support with
multiple storage connectivity options, including FCoE, iSCSI,
and NAS. They also feature Data Center Bridging (DCB),
which enables the reliable exchange of storage trac over
the LAN, eliminating packet loss when network congestion
occurs and allocating bandwidth as needed to keep the
network running eciently. Moreover, VDX 6940 switches
oer NAS Auto QoS intelligence to prioritize delay-sensitive
IP storage trac within the fabric and to help ensure
consistent performance while decreasing latency.
Maximizing Investments
To help optimize technology investments, Extreme
Networks and its partners oer complete solutions that
include professional services, technical support, and
education. For more information, contact a Extreme
Networks sales partner or visit www.extremenetworks.com.
VDX 6940-36Q and 6940-144S Feature Overview
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.)
Height: 4.4 cm (1.73 in.)
Depth: 43.8 cm (17.22 in.)
Weight: 8.9 kg (19.6 lb) without media;
10.1 kg (22.3 lb) with media
Width: 44 cm (17.32 in.)
Height: 8.7 cm (3.41 in.)
Depth:48.5 cm (19.1 in.) 
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