HP HP ProCurve Series 6600 Installation guide

HP Networking 6600 Switch Series Technical Overview
v1.0
Table of contents
Tableofcontents................................. 1
Tableoffiguresandtables.......................... 5
Executive summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Introduction .................................... 7
HP ProCurve 6600 Switch Series . . . . . . . . . . . . . . . . . . . . 7
Audience..................................... 7
Scope....................................... 7
Productpositioning ............................... 8
Overview..................................... 8
Datacenterusemodels........................... 8
6600 series system overview . . . . . . . . . . . . . . . . . . . . . . . 10
Chassislayout ................................ 10
Systemelements............................... 10
HP ProCurve 6600 Switch Power Supply (J9269A) . . . . . . 10
HP ProCurve 6600 Switch Fan Tray (J9271A) . . . . . . . . . . .11
6600LEDs ................................. 13
Processor................................... 14
Memory ................................... 14

Consoleport................................ 15
Ethernet out-of-band management (OOBM) port . . . . . . . . 15
Auxiliary (USB) port. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6600 series system architecture . . . . . . . . . . . . . . . . . . . . . . 15
HP ProCurve 6600-24G Switch (J9263A) . . . . . . . . . . . . . . 15
Description ................................. 16
Ports...................................... 16
Management connectivity . . . . . . . . . . . . . . . . . . . . . . . 16
HP ProCurve 6600-24G-4XG Switch (J9264A) . . . . . . . . . . 16
Description ................................. 16
Ports...................................... 17
Management connectivity . . . . . . . . . . . . . . . . . . . . . . . 17
HP ProCurve 6600-48G Switch (J9451A) . . . . . . . . . . . . . . 18
Description ................................. 18
Ports...................................... 18
Management connectivity . . . . . . . . . . . . . . . . . . . . . . . 18
HP ProCurve 6600-48G-4XG Switch (J9452A) . . . . . . . . . . 19
Description ................................. 19
Ports...................................... 20
Management connectivity . . . . . . . . . . . . . . . . . . . . . . . 20
HP ProCurve 6600-24XG Switch (J9265A) . . . . . . . . . . . . . 21
Description ................................. 21
Enhanced packet buffers . . . . . . . . . . . . . . . . . . . . . . . . 22
Ports...................................... 22
Management connectivity . . . . . . . . . . . . . . . . . . . . . . . 22
ProVision ASIC architecture . . . . . . . . . . . . . . . . . . . . . . . . . 22
Inside the ProVision ASIC architecture. . . . . . . . . . . . . . . . . 22
Classification and lookup. . . . . . . . . . . . . . . . . . . . . . . . 22
Policy Enforcement Engine . . . . . . . . . . . . . . . . . . . . . . . 23
Network switch engine programmability . . . . . . . . . . . . . 23
Fabricinterfaces.............................. 23
ProVisionASICCPU ........................... 23
FabricASIC................................. 24
Managementsubsystem......................... 24
ProVision hardware resiliency . . . . . . . . . . . . . . . . . . . . . 24
6600seriesaccessories........................... 24
HP ProCurve 6600 Switch Premium License (J9305A) . . . . . . 24

HP ProCurve 6600 Switch Power Supply (J9269A). . . . . . . . 24
HP ProCurve 6600 Switch Fan Tray (J9271A) . . . . . . . . . . . 25
Rackmountingoptions........................... 25
2-posttelcoracks............................. 25
4-post racks: HP ProCurve 6600 Series Rack Mount Kit
(J9469A)................................... 25
HP 10000 series server racks: HP 10000 Series Rack
Mount Kit (5070-0145) for 6600 series . . . . . . . . . . . . . . 25
6600 series air plenums. . . . . . . . . . . . . . . . . . . . . . . . . . 26
HP ProCurve 6600 Series Air Plenum Kit (J9480A) . . . . . . 26
HP ProCurve 6600-24G/24G-4XG Air Plenum (J9481A). . . 26
Transceivers and direct attach cables . . . . . . . . . . . . . . . . . 27
1-Gb SFP (mini-GBIC) transceivers . . . . . . . . . . . . . . . . . . 27
10-Gb SFP+ transceivers . . . . . . . . . . . . . . . . . . . . . . . . 27
10-Gb SFP+ direct attach cables . . . . . . . . . . . . . . . . . . . 27
Overview of features and benefits . . . . . . . . . . . . . . . . . . . . 28
Featuresetsummary............................ 30
Datacenteroptimized.......................... 30
Management................................ 30
Connectivity................................. 30
Performance ................................ 31
Resiliency and high availability . . . . . . . . . . . . . . . . . . . . 31
Layer2switching............................. 31
Layer3services.............................. 31
Layer3routing............................... 31
Security.................................... 31
Multicastsupport ............................. 32
QualityofService(QoS)........................ 32
Warrantyandsupport.......................... 33
Standardsandprotocols ......................... 33
Capacity, performance, and features . . . . . . . . . . . . . . . . . . 33
6600seriescomparison ......................... 33
Routing and forwarding tables . . . . . . . . . . . . . . . . . . . . 34
Optimizing the 10-GbE port configuration for wire speed . . . 34
Throughput and latency performance data . . . . . . . . . . . . . 36
10-Gb performance traffic patterns . . . . . . . . . . . . . . . . . 36
Throughputtest............................... 37

Latencymeasurements.......................... 37
Power consumption measurements . . . . . . . . . . . . . . . . . . . 37
PowerSavemode............................. 38
Servicesandsupport............................. 38
Lifetimewarranty............................... 38
Freetelephonesupport .......................... 38
Optional support services. . . . . . . . . . . . . . . . . . . . . . . . . 39
Appendix A: out-of-band management port. . . . . . . . . . . . . . 39
OOBMavailability............................. 39
Applications supported with OOBM port . . . . . . . . . . . . . . 39
OOBMlimitations ............................. 40
Appendix B: Policy Enforcement Engine . . . . . . . . . . . . . . . . 40
Policy Enforcement Engine benefits. . . . . . . . . . . . . . . . . . . 40
Granular policy enforcement . . . . . . . . . . . . . . . . . . . . . 40
Hardware-based performance . . . . . . . . . . . . . . . . . . . . 40
Works with HP ProCurve Data Center Connection
ManagerONE............................... 40
Wire-speed performance for ACLs. . . . . . . . . . . . . . . . . . . 40
Appendix C: PIM-Sparse Mode . . . . . . . . . . . . . . . . . . . . . . 41
Appendix D: virus throttle security . . . . . . . . . . . . . . . . . . . . 42
Responseoptions .............................. 43
Sensitivity.................................... 43
Connection-rateACL............................ 43
AppendixE:VRRP............................... 43
Appendix F: OSPF Equal Cost Multipath . . . . . . . . . . . . . . . . 44
Appendix G: troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 45
LED status indicators for 6600 series . . . . . . . . . . . . . . . . . 45
Appendix H: links to other useful documents . . . . . . . . . . . . . 46
Whitepapers................................. 46
Technicalbriefs................................ 46
Documents related to HP ProCurve 6600 Switch Series and
thedatacenter................................ 46

Figure 1: Top-of-rack use model . . . . . . . . . . . . . . . . . . . . . 9
Figure 2: HP ProCurve 6600 Switch Series (power supply
sideview)............................ 10
Figure 3: HP ProCurve 6600 Switch Power Supply
(J9269A)..............................11
Figure 4: Default airflow direction and connectivity side
view of the 6600-24XG switch . . . . . . . . . . . . . . 12
Figure 5: HP ProCurve 6600 Switch Fan Tray (J9271A) . . . . 12
Figure 6: Closeup view of the HP ProCurve 6600 Switch
SeriesLEDs........................... 14
Table 1: 6600 buffer memory configurations . . . . . . . . . . 14
Figure 7: HP ProCurve 6600-24G Switch—ProVision ASIC
architecture overview . . . . . . . . . . . . . . . . . . . . 15
Figure 8: HP ProCurve 6600-24G-4XG Switch—
ProVision ASIC architecture overview. . . . . . . . . . 16
Table 2: 6600-24G/24G-4XG switches vs. 2910al-24G
and 3500yl-24G switches . . . . . . . . . . . . . . . . . 17
Figure 9: HP ProCurve 6600-48G Switch—ProVision ASIC
architecture overview . . . . . . . . . . . . . . . . . . . . 18
Figure 10: HP ProCurve 6600-48G-4XG Switch—
ProVision ASIC architecture overview. . . . . . . . . . 19
Table 3: 6600-48G/48G-4XG switches vs. 2910al-48G
and 3500yl-48G switches . . . . . . . . . . . . . . . . . 20
Figure 11: Recommended trunking uplink configuration for
the 6600-48G-4XG switch. . . . . . . . . . . . . . . . . 21
Figure 12: HP ProCurve 6600-24XG Switch—ProVision
ASIC architecture overview . . . . . . . . . . . . . . . . 21
Table 4: 6600 series accessories . . . . . . . . . . . . . . . . . . 24
Figure 13: HP ProCurve 6600 Rack Mount Kit (J9469A) . . . . 25
Figure 14: HP 10000 Series Rack Mount Kit (5070-0145)
for6600series ........................ 25
Figure 15: HP ProCurve 6600 Series Air Plenum . . . . . . . . . 26
Figure 16: HP ProCurve 6600 Series Air Plenum Kit
(J9480A)............................. 26
Figure 17: HP ProCurve 6600-24G/24G-4XG Air Plenum
(J9481A)............................. 27
Table of figures and tables

Table 5: SFP+vs.X2optics ...................... 27
Table 6: Capacity, performance, and features
comparison of the 6600 series products . . . . . . . 33
Figure 18: 4-port 10-GbE blocks showing how ports are
grouped to a 14.4-Gbps channel . . . . . . . . . . . . 34
Figure 19: 10-GbE module architecture showing four
ports grouped to a 14.4-Gbps channel . . . . . . . . 34
Figure 20: Approach for providing 10 Gbps on a specific
port................................ 35
Figure 21: Providing equally balanced bandwidth in a
VRRPenvironment....................... 35
Table 7: 6600 series throughput performance. . . . . . . . . . 36
Table 8: 6600 series power consumption measurements . . 37
Table 9: Expected energy savings from 6600 Switch
PowerSavemode....................... 38
Figure A-1: Out-of-band management use model. . . . . . . . . . 39
Figure C-1: PIM: Shared Tree example topology . . . . . . . . . . 41
Figure D-1: Virus throttle example topology. . . . . . . . . . . . . . 42
Figure E-1: VRRP example topology . . . . . . . . . . . . . . . . . . 44
Figure F-1: OSPF ECMP example technology . . . . . . . . . . . . 44
Table G-1: LED status indicators for management/system
supportmodule ........................ 45
Table G-2: LED status indicators for ProCurve 6600 Switch
Series Ethernet ports . . . . . . . . . . . . . . . . . . . . . 46

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Executive summary
HP networking has an extensive line of networking products built around the concept of the ProCurve Adaptive
Network vision that provides the security, mobility, and convergence capabilities businesses demand while
giving technology administrators the ability to adapt to the changing needs of their organizations and control
their infrastructure centrally.
This guide describes the HP ProCurve 6600 Switch Series and how it builds upon the HP ProCurve Switch
8200zl, 5400zl, 6200yl, and 3500yl Series and the principles of the Adaptive Network by providing a
platform for delivering intelligence, performance, and affordability to the edge of the enterprise compute
network. Specifically, the HP ProCurve 6600 Switch Series enhances server edge connectivity in the data
center by delivering advanced Layer 2/3/4 capabilities that embody the Adaptive Network architecture, where
intelligence and decisions are made at the edge of the compute network and effective visibility, provisioning,
and automation is provided remotely. With Gigabit and 10-GbE SFP+ options, front-to-back (reversible)
airflow, redundant hot-swappable power supplies, and a hot-swappable fan tray, the 6600 switches offer high
availability, flexibility, and scalability for a highly virtualized server edge. The HP ProCurve 6600 Switch Series
is the industry’s first data center edge switch with a lifetime warranty and free software updates.
Introduction
HP ProCurve 6600 Switch Series
The HP ProCurve 6600 Switch Series enhances data center top-of-rack server connectivity and end-of-row
aggregation by offering Layer 2/3/4 functionality in 1-GbE copper and 10-GbE SFP+ options.
Audience
This guide is written primarily for technical evaluators and product reviewers of networking equipment and
solutions.
Scope
This guide provides detailed information about and specifications for the ProCurve 6600 Switch Series, with
the assumption that details about networking protocols can be referenced externally by those familiar with
general networking. Technologies that are relatively new will be covered in more detail than more familiar and
established technologies.
References to the ProCurve Switch 8200zl, 5400zl, 3500yl, and 6200yl Series are used as they relate to the
architecture and positioning of the 6600 switch series.
For more information regarding the complete line of HP networking products, please visit www.procurve.com.

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Product positioning
Overview
The intelligence, throughput, scalability, and physical connectivity options of the 6600 series make them
suitable for applications at the server edge or aggregation/distribution layer of a compute network. The 6600
switch series leverages the same ProVision ASIC and software found in the widely deployed 8200zl, 5400zl,
6200yl, and 3500yl products. Enhanced for the data center, the 6600 series provides front-to-back (reversible)
airflow, redundant hot-swappable power supplies, hot-swappable fan trays, expanded 10-Gb port buffering for
demanding high-availability applications.
The foundation for all of these switches is the purpose-built, programmable ProVision ASIC that allows the most
demanding networking features to be implemented in a scalable yet granular fashion. The 6600, 8200zl,
5400zl, 6200yl, and 3500yl series switches have been designed as a continuum of products that utilize a
common code image that enables consistency and scalability throughout the portfolio from data center core to
edge. The ProVision ASICs are aimed at achieving several technology and business imperatives:
•Providing superior feature capabilities and performance without sacrificing affordability
•Allowing sophisticated control features in both campus and data center networks
•Enabling programmatic capabilities to safeguard future needs and requirements
Data center use models
The HP ProCurve 6600 Switch Series includes one of the most advanced routing switches in the HP networking
product line. The 6600 switch series is targeted at both top-of-rack server access and end-of-row aggregation/
distribution for enterprise data centers and midmarket compute rooms. The 6600 series products ship standard
with the Intelligent Edge feature group, and offer an optional Premium License feature group that includes
advanced protocols such as Q-in-Q, PIM-SM, PIM-DM, OSPFv2, OSPFv3, and VRRP to support end-of-row use
models (RIP and static routing features are included in the standard Intelligent Edge feature group).
The 6600 series was specifically designed to support top-of-rack use models with the intent of supporting highly
virtualized server edge deployments for large Layer 2 scale-out systems. The advantages of top-of-rack use
models are effectively fourfold:
•Lower-cost design: Fixed configuration products offer significant per-port savings over modular-based
products. Additionally, top-of-rack products designed to support front-to-back airflow better support hot-aisle
and cold-aisle separation to reduce cooling expenses.
•Enhanced multi-tier network: Virtualized data centers require expansive Layer 2 footprints to allow for
adequate mobility between hypervisors and application scalability. The 6600 series supports 64K MAC
addresses for enhanced mobility and scale in the data center.
•Reduced cabling costs: With the eventual adoption of 10-Gb at the server edge, direct attach copper cables
from the server NIC to the top-of-rack switch significantly reduce the cost per connection versus expensive
fiber-optic connections.
•Easier edge network refresh: When networking becomes integrated in the rack with servers, technology
refreshes become easier to manage as the compute and networking building blocks are effectively deployed
in tandem.

9
Figure 1 provides an example of a three-tiered networking model with top-of-rack networking components.
Data center
network
Core
Server and network “packs”
All applications have standard server deployment
Distribution
Top of rack: enables standard
server edge/edge networking racks
ProCurve edge switches deployed
as part of a standard solution
Standard
servers
Standard
server edge
Server edge
Top-of-rack advantages:
• Lower-cost design
• Enhanced multi-tier network designs
• Reduced cabling costs—copper
connections from server edge for 10-Gb
via direct attach
• Edge network can be refreshed more
easily and frequently without disturbing
distribution or core layers
–› Network can begin to match server
deployment requirements and processes
Figure 1: Top-of-rack use model
The 6600 series (specifically the 6600-24XG switch) is also ideal for end-of-row Layer 2 and Layer 3
aggregation, as the 6600-24XG switch provides the highest-density 10-Gb per rack unit in HP networking’s
product line. The advanced Layer 3 features provided in the Premium License make the 6600-24XG switch an
ideal candidate for aggregation and distribution in the data center. Key features of the ProCurve 6600 series to
support both top-of-rack and end-of-row use models include the following:
•Front-to-back (reversible) airflow—Enables highly virtualized compute environments where connectivity
ports face the hot aisle for use at top of rack. In addition, airflow can be reversed to support end-of-row
aggregation and distribution use models where users want data ports facing forward toward the cold aisle.
•Redundant, hot-swappable power supplies and fans—Power and fan resiliency as well as replaceable in
rack to increase availability.
•64K MAC address scalability—Supports best-in-class 64K MAC addresses to enable data center scale-outs of
highly virtualized server environments.
•Out-of-band management port—Isolated Ethernet management port provides robust access to the
management plane that is truly isolated from in-band data ports (available on 6600-48G, 6600-48G-4XG,
and 6600-24XG switches).
•sFlow for enhanced network visibility—Supports sFlow packet sampling to provide real-time visibility to
monitor traffic across all data ports at up to 10-Gb wire speed.
•Upgradability—Premium License option to support advanced Layer 3 functions most commonly needed for
end-of-row use models.
•Performance—High-capacity switch fabrics (from 48-Gbps to 322-Gbps backplane speed), bandwidth
shaping and control, QoS, and Layer 2 and Layer 3 jumbo frames.
•Security—ACLs (per-port or identity-driven), virus throttle, out-of-band Ethernet management, switch CPU
protection, detection of malicious attacks, DHCP protection, BPDU port protection, dynamic ARP protection,
dynamic IP lockdown, IP and MAC lockdown/lockout, IEEE 802.1X/Web/MAC user authentication, and
management access control (SSH, SSL, TACACS+, secure FTP).
•Resiliency—Redundant hot-swappable power supply options, hot-swappable fan tray, MSTP, switch meshing,
VRRP1, OSPF-ECMP1.
•IP Routing—RIPv1/v2, OSPFv2, OSPFv3, PIM-SM/DM, and static routes.
•Diagnostic—Remote intelligent mirroring, loopback interface, UDLD, and sFlow support.
1Requires Premium Software License

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6600 series system overview
The HP ProCurve 6600 Switch Series was designed to be co-located with data center servers for both top-of-
rack edge access and end-of-row aggregation and distribution deployment models. To support high availability
in a 1U form factor, all 6600 series products allow for redundant hot-swappable power supply options, hot-
swappable fan tray, and front-to-back (reversible) airflow, along with out-of-band Ethernet management ports.
These are key capabilities that separate the 6600 series from other competitive products as well as other
products in the HP networking portfolio and position it well for data center top-of-rack and end-of-row designs.
To allow seamless core-to-edge deployment with HP networking products, the 6600 series shares the same
software and hardware building blocks as the 8200zl, 5400zl, 6200yl, and 3500yl products, thus reducing
complexity and operating expense.
The base configuration for the 6600 series as shipped from the factory includes the following:
•1 system fan tray (J9271A)
−The 6600 ships as a back-to-front direction for ports-rearward installation, but the fan tray is mechanically
reversible to support front-to-back (ports-forward) airflow when positioned as an end-of-row aggregation/
distribution switch.
•1 power supply (J9269A)
−The 6600 series has two power supply bays to support power redundancy.
−The power supplies are hot-swappable and allow for tool-less serviceability.
−The 6600 power supplies leverage the 1200 W ProLiant G6 “common-slot” supply to simplify sparing.
•Rack ears for mounting in a two-post telco rack
−For mounting in a four-post network/server rack, the 6600 rack mount kit (J9469A) that includes telescoping
rails is highly recommended.
•AC power cords
−The system ships with two AC power cords: one is the standard HP line cord using a C13 connector on the
power supply side and a country plug on the source end, while the other is a power distribution unit (PDU)
jumper cord with a C13 connector on the power supply side and a PDU plug on the source end. With either
option, the AC source is: 100 to 120 VAC/200 to 240 VAC; 7.5 A/3.75 A; 50/60 Hz.
Chassis layout
The 6600 switch series are high-density, 1U form factor switches. Figure 2 details the power supply side view
of the 6600 series products.
Internal power supply slots
Fan tray
Figure 2: HP ProCurve 6600 Switch Series (power supply side view)
The 6600 fan tray and power supplies are all hot-swappable so that the switch does not have to be powered
off to remove these serviceable components.
System elements
HP ProCurve 6600 Switch Power Supply (J9269A)
Two power supplies need to be installed to take advantage of the power supply hot-swappable capabilities.
The power supply slots can accommodate the ProLiant G6 “common-slot” supplies. Currently, the 6600 series

11
supports only the 1200 W AC supply, although the 6600 series is capable of supporting DC and other
common-slot supplies.
Two AC-to-12-V DC power supplies can be configured as 1+1 redundant supplies. The system is fully powered
with either power supply, and either power supply (but not both) can be removed and replaced while the
system is still racked, and the switch will continue to operate. Each power supply input is C14 with proper
safety ground.
110–120 VAC 200–240 VAC
Current < 7.5 A < 3.75 A
Output power > 548 W (> 45.7 A @ 12 VDC) > 548 W (> 45.7 A @ 12 VDC)
Efficiency (1 supply) < 677 W @ > 81% efficiency at full load < 677 W @ > 81% efficiency at full load
Efficiency (2 supplies) < 677 W @ > 75% efficiency at 50% load < 677 W @ > 75% efficiency at 50% load
Efficiency calculations include internal fans and line filter. The power supply size is 4.4 inch x 63 inch x 8 inch
(57 in3) with an output power density of ~9.6 W/in3. The power supply ships with two W40S12BUA5-01
40 mm x 40 mm x 28 mm (44,800 mm3) NIDEC fans or equivalent, producing 36 CFM (18 CFM each)
at .5 INWG using 13.2 W (6.6 W each).
In terms of the power supply load-sharing algorithm when two supplies are installed, the power load is shared
equally across both supplies to improve longevity. All 6600 series products utilize the same power supply to
reduce sparing.
Figure 3: HP ProCurve 6600 Switch Power Supply (J9269A)
HP ProCurve 6600 Switch Fan Tray (J9271A)
The fan tray assembly contains the cooling fans for the interior of the 6600 chassis; the power supplies have
their own internal cooling fans. The 6600 fan tray consists of eight variable-speed fans, which offer N+N
redundancy. Thus, half of the eight fan rotors can fail and the system will maintain cooling capacity. The fan
speed is based on the sensed ambient temperature inside the chassis.
The default airflow configuration for the fan tray is power supply side to port side (front to back, also described
as power to port side). Figure 4 shows the default direction for the 6600 series products. The fan tray is
mechanically reversible, by first removing the fan tray and then loosening the four T10 torx screws on the
sides of the fan assembly. Reversing the fan tray should occur when the system has been powered off to allow
adequate time for replacement. A position sensor determines the configuration of the fan tray, which is then
reported through the CLI as to the direction of the airflow. There is a system configuration option (see section
titled “Monitoring airflow direction”) to report an error if a replacement fan is installed with the incorrect fan
orientation.
To support high-availability data center configurations, the fan tray can be replaced without system shutdown
if replacement occurs in under 3 minutes (the 6600 software monitors the time and takes required action to
protect the system). Because the fan tray can easily be replaced in less than 30 seconds, the 3-minute service
window provides adequate time to make a replacement, but users should replace the fans as quickly as
possible. Care must also be taken to install the replacement fan tray to help ensure that the airflow direction is
correct for the product’s deployment.
To reduce sparing requirements, all 6600 series products utilize the same fan tray.

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Figure 4: Default airflow direction and connectivity side view of the 6600-24XG switch
In the event of an individual fan failure, an SNMP trap and event log entry is generated. A system can typically
operate for quite a long time with a single fan failure (out of the eight), as the remaining fans can increase
speed to compensate for the loss of airflow.
The fan tray replicates the Power, Fan, Fault, and Locator LEDs found on the connectivity side of the 6600
switch. This is useful when attempting to locate a 6600 switch while servicing the product from either the hot- or
cold-aisle side of the equipment cabinets.
Figure 5: HP ProCurve 6600 Switch Fan Tray (J9271A)
Monitoring airflow direction
The “fan-pref-airflow-dir” CLI command registers the preferred airflow direction (front to back or back to front)
in the 6600 switch’s configuration file. Because the fan tray is mechanically reversible, it’s important for users
to monitor when fan hardware configuration does not match the desired configuration that is registered in the
configuration file. This notification is especially important when replacing a fan tray in a serviceable event. It
is important to note that the “fan-pref-airflow-dir” command does not change the airflow direction—it must be
reversed mechanically. The following sequence details CLI output from a 6600-24G switch where the “fan-pref-
airflow-dir” command has been entered:
ProCurve Switch 6600ml-24G# sh system fan
 fan-pref-airow-dir
fans
ProCurve Switch 6600ml-24G# sh system fans
Fan Information:
Num State AirowDirection Failures
Sys-1 Fan Ok Power To Port 0
*UserpreferredfanairowdirectionisPorttoPower
ProCurve Switch 6600ml-24G# shsystemfan-pref-airow-dir
 Preferredfanairowdirection:PortToPower
To illustrate the usefulness of the “fan-pref-airflow-dir” command, by default the 6600 switches ship from
the factory configured with back-to-front (power side to port side) cooling, with the intention that top-of-rack

13
switches would more likely have their network ports facing toward the back (hot aisle) of the cabinet to facilitate
server connectivity. With this intention, the default configuration for the command is, “Power-to-Port”, so the
“fan-pref-airflow-dir” command will not show up in the configuration file—it is the default.
If the user intends to change the airflow so that the preferred direction is Ethernet ports facing the cold aisle,
then in the configuration file the use should change the preferred direction to be port to power.
Upon change, the user would see:
» Log Entry/Syslog event
» And the “*” and message in the “show system fans” output
If the physical setup of the fans did not match this configured parameter—that is, it is there so that if someone
forgot to reverse the fans and you configured this preference, the user would receive a warning.
If everything matched properly (as they would from the factory), the output of the “show system fans” would
simply be as follows, with no warnings or messages:
ProCurve Switch 6600ml-24G# sh system fans
Fan Information:
Num State AirowDirection Failures
Sys-1 Fan Ok Power To Port 0
ProCurve Switch 6600ml-24G# sh system fan-pref-airow-dir
 Preferredfanairowdirection:PowerToPort
Imagine if someone wanted their ports mounted in the front/cold aisle and they had a warranty replacement
of the fan tray—and they forgot to reverse the fans. This event would pop up because the user had configured
the 6600 switch with a power-to-port direction (that is, the air is pulled in from the back of the unit [power], and
ejected out of the front [the ports]). In this instance, the user would receive a warning.
The SNMP MIB object to manipulate the setting of the “Preferred Fan Direction” is:
hpicfDcFan.mib –> hpicfFanUserPrefAirflowDir
6600 LEDs
The LEDs on the 6600 switch are grouped in two columns:
•One set to indicate the status of system components (power supplies, temperature, fan tray, and so on)
•One set to indicate the switch state (Active, Standby, or Down)
Locator LED
The Locator function is enabled through the following CLI command:
ProCurve Switch 6600ml-24G# chassislocate ?
 blink Blinkthechassislocateled(default30minutes).
 off Turnthechassislocateledoff.
 on Turnthechassislocateledon(default30minutes).
ProCurve Switch 6600ml-24G# chassislocate blink ?
 <1-1440> Numberofminutesduration(default30).
<cr>
By indicating a number N after either the “blink” or “on” parameter, the locator LED will extinguish
automatically after N minutes. Without specifying a value, the default is 30 minutes.
The LED indicators are covered in more detail in “Appendix G: troubleshooting” later in this document.

14
Figure 6: Closeup view of the HP ProCurve 6600 Switch Series LEDs
Processor
The CPU processor is a Freescale PowerPC 8540 operating at 667 MHz.
Memory
SDRAM
Synchronous Dynamic RAM (SDRAM) is used for the storage of uncompressed executable code and data
structures. The SDRAM consists of a 256 MB DDR-1 DIMM in the base module, expandable up to 1 GB. The
DDR-1 interface is 64 bits running at 166-MHz bus speed (333-MHz data rate).
Buffer memory
Table 1 highlights the amount of QDR SDRAM allocated for buffer memory for all 1-Gb and all 10-Gb data
ports for each of the 6600 series products.
Product Buffer memory for 1-Gb ports Buffer memory for 10-Gb ports
6600-24G switch (J9263A) 18 MB –
6600-24G-4XG switch (J9264A) 18 MB 18 MB
6600-48G switch (J9451A) 36 MB –
6600-48G-4XG switch (J9452A) 36 MB 36 MB
6600-24XG switch (J9265A) – 108 MB
Table 1: 6600 series buffer memory configurations
Flash memory
Both 24-port Gigabit products include 256 MB of Compact Flash and 4 MB of MirrorBit Flash. All other 6600
series products include 1 GB of Compact Flash memory as well as 4 MB of MirrorBit Flash. The MirrorBit Flash
is used for initial boot code. The Compact Flash is used for nonvolatile configuration storage (“NVRAM”).
Compressed image storage and the relatively large storage capacity allow multiple configurations and images
to be stored locally to facilitate upgrades and rollbacks during maintenance periods. The Compact Flash card
is removable for future upgrade capability if needed.
Because all application code is executed out of SDRAM, the Compact Flash may be programmed while the
switch is operational; that is, you can download new code onto the Compact Flash during system operation.
The Compact Flash is sized so that a backup copy of an older revision of application code also may be stored.
The system also allows you to hold up to three copies of configuration files, associating them to a particular
Flash image (primary => Config1, secondary => Config2, Active Running session => Config3).

15
Console port
The console port allows for RS-232 serial connectivity for local management and configuration. For the 6600-
48G, 6600-48G-4XG, and 6600-24XG switches, the console port is an RJ-45 connector. To connect to the
console, an RJ-45–to–DB-9 cable is provided with each switch to connect to the serial port on a laptop. The
6600-24G/6600-24G-4XG products offer a DB-9 serial console port for management access, and a DB-9–to–
DB-9 cable is provided. The part numbers for the various console port cables are as follows:
DB-9–to–DB-9 console cable: 5184-1894 (included with 6600-24G/24G-4XG switch)
RJ-45–to–DB-9 console adapter: 5189-6795 (included with 6600-48G/48G-4XG/24XG switch)
For a detailed description of the console cable pin-outs, please refer to the “Installation and Getting Started
Guide” located at www.hp.com/rnd/support/manuals/6600dc.htm
Ethernet out-of-band management (OOBM) port
The 6600-48G, 6600-48G-4XG, and 6600-24XG models offer an RJ-45 10/100 Ethernet management port
with isolated CPU and memory resources and a separate TCP/IP stack to provide control of the 6600 switch,
even in cases where the in-band network has succumbed to a broadcast storm or has become inaccessible
through misconfiguration. The out-of-band management (OOBM) port effectively provides in-band management
capabilities in an out-of-band context by enabling key services such as SSH, Telnet, TFTP, HTTP, SNTP, RADIUS,
TACACS, DNS, syslog, ping, and traceroute. “Appendix A: out-of-band management port” provides more
details about the capabilities of the OOBM port.
Auxiliary (USB) port
The connectivity side of the 6600 series includes a USB auxiliary port that is used to transfer configuration and
image files without the need to establish console or network access. The system image and configurations can
be copied to a USB memory stick, and the 6600 switch can copy the configuration and image from USB, just
as users typically would over the network. The auxiliary port is enabled by default, but can be deactivated as
part of the CLI and MIB structure.
The USB port is compatible with the 1.1 USB standard and only supports file storage.
6600 series system architecture
The following section provides an architectural review of each of the HP ProCurve 6600 switches.
HP ProCurve 6600-24G Switch (J9263A)
4 port
mGBIC
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
NG ASIC
24 gigMACs
4 port
mGBIC
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
F1
6 Hi-Speed
Links
Based on 3500yl design
Management function
(on motherboard)
NG ASIC
24-Gb MACs
4-port
mGBIC
24-Gb ports
F1
6High-speed
links
48.0-Gbps*
switching capacity
14.4-Gbps HSL
14.4-Gbps HSL
Mgmt. to N-chip comm.
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
• Based on 3500yl-24G design
• 4 ports are dual personality (Gig-T or Gigabit fiber)
• No NGX ASIC (no 10-Gb uplink option)
• Runs same code as 3500yl/5400zl/8200zl switch
* 48.0 Gbps = 24x2(Fdx), although
F1 has a full capability of
172.8-Gbps switching
Figure 7: HP ProCurve 6600-24G Switch—ProVision ASIC architecture overview

16
Description
The HP ProCurve 6600-24G Switch is a data center optimized, advanced Layer 3 1U stackable switch with
20 10/100/1000Base-T ports and 4 dual-personality ports. The 6600 series 1U form factor switches are
enhanced for server edge connectivity with front-to-back cooling, redundant hot-swappable power, and
redundant hot-swappable fans. The foundation for all these switches is a purpose-built, programmable ProVision
ASIC that allows the most demanding networking features, such as QoS and security, to be implemented in
a scalable yet granular fashion. With a variety of connectivity interfaces and expanded buffering, the 6600
switches offer excellent investment protection, flexibility, and scalability, as well as ease of deployment and
reduced operational expense.
Ports
•24 10/100/1000Base-T RJ-45 connectors
•4 dual-personality 1-GbE SFP (can be used in lieu of last four 10/100/1000Base-T ports)
Management connectivity
•DB-9 serial console port
HP ProCurve 6600-24G-4XG Switch (J9264A)
4 port
mGBIC
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
NG ASIC
24 gigMACs
4 port
mGBIC
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
1
F1
6 Hi-Speed
Links
NGX ASIC
18MB pkt buffer
4 10gigMACs
SFP+
port
SFP+
port
SFP+
port
SFP+
port
Four 10 GbE ports
SFP+
port
SFP+
port
SFP+
port
SFP+
port
Based on 3500yl design
Management function
(on motherboard)
NG ASIC
24-Gb MACs
4-port
mGBIC
24-Gb ports
Four 10-GbE ports
F1
6High-speed
links
105.6-Gbps*
switching capacity
14.4-Gbps HSL
14.4-Gbps HSL
14.4-Gbps HSL
14.4-Gbps HSL
Mgmt. to N-chip comm.
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
• Based on 3500yl-24G design
• 4 ports are dual personality (Gig-T or Gigabit fiber)
• NGX ASIC with 18 MB packet buffer
(3500yl series has 4.5 MB and 10-Gb ports)
• Runs same code as 3500yl/5400zl/8200zl switch
* 105.6 Gbps = (24+28.8)x2(Fdx),
although F1 has a full capability of
172.8-Gbps switching
SFP+
port
SFP+
port
SFP+
port
SFP+
port
NGX ASIC
18-MB pkt buffer
4 10-Gb MACs
Figure 8: HP ProCurve 6600-24G-4XG Switch—ProVision ASIC architecture overview
Description
The HP ProCurve 6600-24G-4XG Switch is a data center optimized, advanced Layer 3 1U stackable switch
with 20 10/100/1000Base-T ports, 4 dual-personality ports, and 4 SFP+ 10-GbE integrated ports. The 6600
series 1U form factor switches are enhanced for server edge connectivity with front-to-back cooling, redundant
hot-swappable power, and redundant hot-swappable fans. The foundation for all these switches is a purpose-
built, programmable ProVision ASIC that allows the most demanding networking features, such as QoS and
security, to be implemented in a scalable yet granular fashion. With a variety of connectivity interfaces and
expanded buffering, the 6600 switches offer excellent investment protection, flexibility, and scalability, as well
as ease of deployment and reduced operational expense.

17
The ASIC layout shown in Figure 8 for the data center focused 6600-24G-4XG switch adds an NGX ASIC to
provide a 10-Gb uplink capability to this switch model. Unlike the 3500yl-24G switch, where the yl 10-Gb
module is rear mounted, the 6600-24G-4XG switch moves the 10-Gb ports to the front of the switch for
simplified cabling.
Examining the Gigabit ports, the last four ports are dual personality, meaning they can be used as RJ-45
copper ports or mGBIC (or SFP) fiber ports. The 6600-24G-4XG switch offers four ports of 10-Gb using SFP+
port slots—instead of X2 slots used on earlier 10-Gb HP networking products. There is no CX4 option for these
SFP+ products, but HP networking offers a low-cost copper direct attach cable (or DAC) option that is based
on the Small Form Factor Committee (SFF-8431) standard. The DACs are essentially a preterminated cable
with SFP+ compatible transceivers. DAC products are available in 1-, 3-, and 7-m lengths, primarily for close
proximity connections to 10-Gb servers or other SFP+ switches, such as in the same server cabinet. The 6600
accessories portion of this guide provides further details about the direct attach options.
The fabric-switching capacity is listed the same as the 3500yl-24G switch, where we account for the added
NGX ASIC and its maximum capacity of 28.8 Gbps of throughput. Table 2 compares the 6600-24G/24G-4XG
architectures to that of the 3500yl-24G and 2910al-24G switches.
2910al-24G 6600-24G 6600-24G-4XG 3500yl-24G
Rack height 1U 1U 1U 1U
1-Gb RJ-45 24 24 24 24
1-Gb SFP 4* 4* 4* 4*
10-Gb SFP+ 4 (2 X2/2 CX4) – 4 4 (2 X2/2 CX4)
Max. 1-Gb wire-speed ports 24 24 24 24
Max. 10-Gb wire-speed ports 4 – 2 2
Management console port RJ-45 Serial DB-9 Serial DB-9 Serial DB-9
10-Gb port buffering 6 MB** – 18 MB 4.5 MB
Out-of-band mgmt. port – – – –
Power save option – – – –
Power supply 1 internal PS
(external PS option)
2 internal PS slots
(ships with 1 PS)
2 internal PS slots
(ships with 1 PS)
1 internal PS
(external PS option)
Routing/Switching capacity 128.0 Gbps 48.0 Gbps 101.8 Gbps 101.8 Gbps
Fabric capacity 128.0 Gbps 48.0 Gbps 105.6 Gbps 105.6 Gbps
Switch throughput 95.2 mpps 35.7 mpps 75.7 mpps 75.7 mpps
MAC address entries 16K 64K 64K 64K
ACL entries 0.5K 3K 3K 3K
Routing table entries 2K 10K 10K 10K
* Dual-personality ports
** 16-MB shared across all 1-Gb and 10-Gb ports
Table 2: 6600-24G/24G-4XG switches vs. 2910al-24G and 3500yl-24G switches
Ports
•24 10/100/1000Base-T RJ-45 connectors
•4 dual-personality 1-GbE SFP (can be used in lieu of last 4 10/100/1000Base-T ports)
•4 10-GbE SFP+ ports (10-GbE-only speeds)
•SFP and SFP+ slots are not interchangeable and only support HP networking-branded optics
Management connectivity
•DB-9 serial console port

18
HP ProCurve 6600-48G Switch (J9451A)
4 port
mGBIC
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
NG ASIC
24 gigMACs
4 port
mGBIC
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
NG ASIC
24 gigMACs
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
10/100 Out- of- Band Ethernet Management port
Based on 5400zl design
Management function
(on motherboard)
NG ASIC
24-Gb MACs
NG ASIC
24-Gb MACs
24-Gb ports 24-Gb ports
F2
12 High-speed
links
96.0-Gbps*
switching capacity
14.4-Gbps HSL
14.4-Gbps HSL
Mgmt. to N-chip comm.
10/100 Ethernet out-of-band management port
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
• 4-Gb fiber ports (4 dual-personality ports)
• Runs same code as 3500yl/5400zl/8200zl switch
• No NGX ASIC (no 10-Gb uplink option)
* 96.0 Gbps = (24+24)x2(Fdx),
although F2 has a full capability of
345.6-Gbps switching
14.4-Gbps HSL
14.4-Gbps HSL
4-port
mGBIC
Figure 9: HP ProCurve 6600-48G switch—ProVision ASIC architecture overview
Description
The HP ProCurve 6600-48G Switch is a data center optimized, advanced Layer 3 1U stackable switch with
44 10/100/1000Base-T ports and 4 dual-personality ports. The 6600 series 1U form factor switches are
enhanced for server edge connectivity with front-to-back cooling, redundant hot-swappable power, and
redundant hot-swappable fans. The foundation for all these switches is a purpose-built, programmable ProVision
ASIC that allows the most demanding networking features, such as QoS and security, to be implemented in
a scalable yet granular fashion. With a variety of connectivity interfaces and expanded buffering, the 6600
switches offer excellent investment protection, flexibility, and scalability, as well as ease of deployment and
reduced operational expense.
The 6600-48G model is configured for 48-Gb copper connections, with the last four ports serving as dual-
personality options to accommodate mGBIC (SFP) fiber connections for longer-reach uplinks. Like the 6600-
24G switch, the 6600-48G switch does not offer a 10-Gb uplink capability, as the primary use model is for
low-cost, top-of-rack aggregation of server iLO ports and other Ethernet-based management ports. Unlike the
6600-24G switch, the 6600-48G switch is based on the 5400zl design, using an F2 fabric ASIC and a newly
designed motherboard. Due to this redesign effort, HP networking offers the 6600-48G/48G-4XG and the
6600-24G/24G-4XG switches with a 10/100Base-T Ethernet out-of-band management (OOBM) port. The
OOBM port interfaces directly to the management function on the motherboard to provide a truly separate IP
stack that is independent of the Ethernet switch-forwarding plane. The OOBM port is in addition to the RJ-45
serial console port that was first introduced on the HP ProCurve 8212zl chassis. The OOBM port is discussed
further in the appendix of this document.
Ports
•48 10/100/1000Base-T RJ-45 connectors
•4 dual-personality 1-GbE SFP (can be used in lieu of last four 10/100/1000Base-T ports)
Management connectivity
•RJ-45 serial console port
•RJ-45 Ethernet out-of-band management port

19
HP ProCurve 6600-48G-4XG Switch (J9452A)
SFP+
port
SFP+
port
NGX
ASIC
18MB pkt buffer
4 10gigMACs
SFP+
port
SFP+
port
Four Wirespeed
10 GbE
NGX
ASIC
18MB pkt buffer
4 10gigMACs
SFP+
port
SFP+
port
NGX
ASIC
18MB pkt buffer
4 10gigMACs
SFP+
port
SFP+
port
NGX
ASIC
18MB pkt buffer
4 10gigMACs
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
NG
ASIC
24 gigMACs
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
NG
ASIC
24 gigMACs
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
6 port
PHY
1
10/100 Out- of- Band Ethernet Management port
NGX
ASIC
18-MB pkt. buffer
4 10-Gb MACs
Based on 5400zl design
Management function
(on motherboard)
NG ASIC
24-Gb MACs
NG ASIC
24-Gb MACs
24-Gb ports 24-Gb ports
F2
12 High-speed
links
176.0-Gbps*
switching capacity
14.4-Gbps HSL 14.4-Gbps HSL
14.4-Gbps HSL
14.4-Gbps HSL
14.4-Gbps HSL
14.4-Gbps HSL
Mgmt. to N-chip comm.
10/100 Ethernet out-of-band management port
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
6-port
PHY
• No Gigabit fiber ports;
SFP+ ports are 10-Gb only
• Runs same code as
3500yl/5400zl/8200zl
switch
• Two NGX ASIC with 18-MB
pkt. buffer (3500yl switch has
4.5 MB) for full 40-Gb
wire-speed capability
* 176.0 Gbps = (24+24 + 20+20)x2(Fdx),
although F2 has a full capability of
345.6-Gbps switching
14.4-Gbps HSL
14.4-Gbps HSL
4 wire-speed 10-GbE ports
SFP+
port
SFP+
port
SFP+
port
SFP+
port
NGX
ASIC
18-MB pkt. buffer
4 10-Gb MACs
Figure 10: HP ProCurve 6600-48G-4XG Switch—ProVision ASIC architecture overview
Description
The HP ProCurve 6600-48G-4XG Switch is a data center optimized, advanced Layer 3 1U stackable switch
with 48 10/100/1000Base-T ports and 4 SFP+ 10-GbE integrated ports. The 6600 series 1U form factor
switches are enhanced for server edge connectivity with front-to-back cooling, redundant hot-swappable power,
and redundant hot-swappable fans. The foundation for all these switches is a purpose-built, programmable
ProVision ASIC that allows the most demanding networking features, such as QoS and security, to be
implemented in a scalable yet granular fashion. With a variety of connectivity interfaces and expanded
buffering, the 6600 switches offer excellent investment protection, flexibility, and scalability, as well as ease of
deployment and reduced operational expense.
To achieve wire-speed forwarding on all ports, the 6600-48G-4XG model is configured with two NGX
10-Gb ASICs. Each NGX connects to two downstream 10-Gb SFP+ ports, and therefore provides full line-rate
capacity across all four 10-Gb ports. Because each NGX is only connected to two 10-Gb ports, the maximum
throughput of each NGX ASIC is only counted as 20-Gb full-duplex (or 40-Gb switching). Thus, unlike the
3500yl-48G architecture, where the 4 x 10-Gb module connects to a single NGX ASIC, thereby achieving a
maximum throughput of 28.8 Gb across all four 10-Gb ports, the 6600-48G-4XG switch can achieve 40 Gb of
throughput.

20
Table 3 details the comparison of the 6600-48G/48G-4XG switches, the 2910al-48G, and the 3500yl-48G
switches in more detail.
2910al-48G 6600-48G 6600-48G-4XG 3500yl-48G
Rack height 1U 1U 1U 1U
1-Gb RJ-45 48 48 48 48
1-Gb SFP 4* 4* – 4*
10-Gb SFP+ 4 (2 X2/2 CX4) – 4 4 (2 X2/2 CX4)
Max. 1-Gb wire-speed ports 48 48 48 48
Max. 10-Gb wire-speed ports 4 – 4 2
10-Gb port buffering 6 MB** – 36 MB 4.5 MB
Management console port RJ-45 RJ-45 RJ-45 Serial DB-9
Out-of-band mgmt. port – RJ-45 10/100 Ethernet RJ-45 10/100 Ethernet –
Power save option – Yes Yes –
Power supply 1 internal PS
(external PS option)
2 internal PS slots
(ships with 1 PS)
2 internal PS slots
(ships with 1 PS)
1 internal PS
(external PS option)
Routing/Switching capacity 176.0 Gbps 96.0 Gbps 176.0 Gbps 149.8 Gbps
Fabric capacity 176.0 Gbps 96.0 Gbps 176.0 Gbps 153.6 Gbps
Switch throughput 130.9 mpps 71.4 mpps 130.9 mpps 111.5 mpps
MAC address entries 16K 64K 64K 64K
ACL entries 0.5K 3K 3K 3K
Routing table entries 2K 10K 10K 10K
* Dual-personality ports
** 6 MB shared across all 1-Gb and 10-Gb ports
Note: The 6600-48G-4XG switch does not support 1-Gb mGBIC/SFP capability. The last four ports are exclusively for 10-Gb SFP+ transceivers; they are
not capable of running at Gigabit speeds.
Table 3: 6600-48G/48G-4XG switches vs. 2910al-48G and 3500yl-48G switches
With line-rate processing across all four 10-Gb SFP+ ports, the 6600-48G-4XG switch is an effective solution to
provide true non-blocking connectivity to 40-Gb servers with 40-Gb uplink capability (along with the increased
packet-buffer capabilities of the 6600 series for its 10-Gb ports—18 MB of packet buffering, in this case, per
pair of 10-Gb ports for 36-MB total in available 10-Gb memory. A similarly configured 3500yl-48G switch
with its 4 x 10-Gb yl module option would be oversubscribed if connected to 40-Gb servers with only 28.8-Gb
maximum throughput. The 3500yl-48G switch is also limited to 4.5 MB of packet buffer memory across all
10-Gb ports).
Ports
•48 10/100/1000Base-T RJ-45 connectors
•4 10-GbE SFP+ ports (10-GbE-only speeds)
Management connectivity
•RJ-45 serial console port
•RJ-45 Ethernet out-of-band management port