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Cisco Nexus 7000 Series Switches

Cisco Nexus 7700 Series Switches Environment Data Sheet

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Product Overview

The Cisco Nexus® 7700 Switches is the latest extension to the modular Cisco Nexus 7000 Series Switches. Capable of 83 terabits per second (Tbps) of overall switching capacity, the Cisco Nexus 7700 switches deliver the highest-capacity 10, 40, and 100 Gigabit Ethernet ports in the industry: up to 768 wire-rate 10-Gbps ports, 384 40-Gbps ports, and 192 100-Gbps ports. The Cisco Nexus 7700 switches have operation and feature consistency with the existing Cisco Nexus 7000 Series Switches, using the same system architecture, application-specific integrated circuit (ASIC) technology, and proven Cisco® NX-OS Software versions.

Designed to meet the requirements of the most mission-critical data centers, these switches deliver outstanding availability and scalability and a comprehensive Cisco NX-OS feature set that includes real-time system upgrades with exceptional manageability and serviceability.

The Cisco Nexus 7700 chassis (Figures 1 and 2) incorporate significant enhancements in design, power, airflow, cooling, and cabling. Both the 10-slot chassis and 18-slot chassis have true front-to-back airflow, making them excellent solutions for hot-aisle and cold-aisle deployments. The power supplies, I/O modules, and supervisor modules are accessible from the front of the chassis, and the fabric modules and fan trays are accessible from the back of the chassis. In addition, the Cisco Nexus 7000 Series has many power saving enhancements such as temperature sensors, variable-speed fans, and high-efficiency power supplies that reduce the total cost of ownership (TCO) for customers.

Figure 1. Cisco Nexus 7700 10-Slot Switch Chassis

Figure 2. Cisco Nexus 7700 18-Slot Switch Chassis

Physical Specifications

The Cisco Nexus 7700 10-Slot Switch chassis has two supervisor slots, eight I/O module slots, dual-side integrated cable management, eight power supply bays, and an optional air filter on the front of the chassis. On the back, it has three system fan trays and six fabric slots behind the fan trays.

The Cisco Nexus 7700 18-Slot Switch chassis has two supervisor module slots, 16 I/O module slots, dual-side integrated cable management, 16 power supply bays, and a dual-hinged protective front door, allowing unobstructed access to the cables and modules. On the back are three system fan trays and six fabric module slots behind the fan trays.

Table 1 summarizes the physical features of the chassis.

Table 1. Physical Specifications

Item

Description

Cisco Nexus 7700 10-Slot Switch

Cisco Nexus 7700 18-Slot Switch

Dimensions

(H x W x D)

24.35 x 17.3 x 34 in. (61.85 x 43.9 x 86.4 cm)
42.25 x 17.3 x 35 in. (111.49 x 43.9 x 88.9 cm)

Chassis depth with cable management and doors

40 in. (101.6 cm)

41 in. (104.1 cm)

Rack units (RUs)

14RU

26RU

Weight

Chassis only

160 lb (72 kg)

300 lb (136 kg)

Fully configured

438 lb (199 kg)

900 lb (408 kg)

Module orientation

Supervisor and I/O modules: Horizontal
Fabric cards (at the back): Vertical
Supervisor and I/O modules: Horizontal
Fabric cards (at the back): Vertical

Airflow

Front to back
Designed for hot-aisle and cold-aisle deployments
Front to back
Designed for hot-aisle and cold-aisle deployments

Cable management

Integrated dual-side cable management for flexible cabling deployments

Air filter

Optional door air filter

Doors

Lockable front module doors

System LEDs

5 system LEDs that summarize the device status:

LED 1: Power supplies

LED 2: Fans

LED 3: Supervisors

LED 4: Fabric modules

LED 5: I/O modules

Each LED is green if the status is normal, and amber otherwise.

Power

The Cisco Nexus 7700 10-Slot chassis has 8 power supply bays, and the Cisco Nexus 7700 18-Slot chassis has 16 power supply bays that can hold 3.0-kilowatt (kW) AC or DC power supplies. The smaller power supply configuration provides more flexibility and greater control in power provisioning. The 8 power supply bays and the 16 power supply bays for the 10-slot and 18-slot chassis respectively are designed for future growth, and most common configurations do not require the use of all power supply units for redundant power configurations.

Each 3000-watt (W) power supply has one universal (100 to 240 volt [V]) input that can be connected to one AC source using an AC power cord with a C19 connector. Two versions are available: one for International markets, with an IEC 60309 AC plug; and one for U.S. markets, with a NEMA L6-30 AC plug.

Table 2 shows the power output provided by one Cisco Nexus 7000 Series 3.0-kW AC Power Supply Module.

Table 2. Power Supply Output

Power Supply Input

Output

Single input

220V

3000W

110V

1500W

Table 3 shows the power output provided by one Cisco Nexus 7000 Series 3.0-kW DC Power Supply Module.

Table 3. Power Supply Output

Power Supply Input

Input

Output

Single input

48V

1500W

Dual Input

48V

3000W

Cisco Nexus 7000 Series power supplies are more than 90 percent efficient, so less power is dissipated as heat, and more power is available for the system to use than with typical power supplies. The high-efficiency 3-kW power supplies allow smaller power configuration and provide flexible power provisioning. The Cisco Nexus 7700 systems can operate in four user-configurable power redundancy modes, listed in Table 4. The power redundancy modes are designed to determine the optimum power for the combination of power supplies installed, helping ensure system availability.

Table 4. Power Redundancy Modes

Redundancy Mode

Description

Combined

Does not provide redundancy; power available to the system is the sum of power outputs of all power supplies (Cisco does not recommend this mode)

Power supply redundancy (N+1redundancy)

System default redundancy mode; guards against failure of one of the power supplies, and power available to the system is the sum of the two least-rated power supplies.

Input source redundancy (grid redundancy)

Guards against failure of one input circuit (grid); power available to the system is the minimum power provided by either of the input sources (grids).

Power supply and input source (full) redundancy (DC only)

Guards against failure of either one power supply or one grid, and the available power is the minimum power for input source and power supply redundancy.

The NX-OS platform software requires a minimum of 3230W to run the 10-slot system (three fan trays, six fabric modules, and two supervisor modules), and 5030W to run the 18-slot system (three fan trays, six fabric modules, and two supervisor modules). If the power available from the power supplies is more than the minimum, the additional power is used to activate the I/O modules. If there is not enough power to activate the I/O modules, the I/O modules are kept in a power-denied state. After more power is provisioned, the user must turn on power to the I/O modules manually to activate them.

Under typical operating conditions, the system consumes significantly less power than the maximum values. The NX-OS platform software uses the maximum values to reserve sufficient power for the I/O modules. The typical power rating is the value that is commonly seen in a temperature-controlled environment.

Table 5 shows the maximum and typical power ratings for the system and modules.

Table 5. Maximum and Typical Power Requirements

Component

Part Number

Maximum Power

Typical Power

Supervisor 2E module

N77-SUP2E

265W

137W

48-port 1/10 Gigabit Ethernet (Enhanced Small Form-Factor Pluggable [SFP+]) module

N77-F248XP-25E

500W

450W

10-slot chassis: Fabric-2 module

N77-C7710-FAB-2

150W

122W

18-slot chassis: Fabric-2 module

N77-C7718-FAB-2

300W

260W

10-slot system fan

N7K-C7710-FAN

600W

30W

18-slot system fan

N77-C7718-FAN

900W

102W

Climatic Environment

Table 6 summarizes the climatic environment for the Cisco Nexus 7700 10-Slot and 18-Slot chassis.

Table 6. Climatic Environment

Item

Description

Cisco Nexus 7700 10-Slot Switch

Cisco Nexus 7700 18-Slot Switch

Temperature

Note: Chassis external thermal requirements are defined in the GR-63-CORE Network Equipment Building Standards (NEBS) specification published by Telcordia Technologies in Section 4.1.2, Operating Temperature and Humidity Criteria.

Humidity

Note: An ambient relative humidity between 45 and 50% is suggested to reduce corrosive problems, to provide an operating time buffer in the event of failures, and to reduce interference from static discharges.

Altitude

Operational vibrations

Floor loading

122 lb per sq ft

230 lb per sq ft

Seismic

Zone 4 per GR63

Heat dissipation

52500 BTU per hour per chassis (maximum)

96160 BTU per hour per chassis (maximum)

Airflow and Cooling

The 10-slot chassis cooling system consists of three redundant system fan trays that deliver cooling for the I/O and supervisor modules as well as the fabric modules. Each system fan tray is composed of multiple independent fans. All fan trays are removable from the rear of the chassis, allowing continuous system operation during maintenance. Table 7 summarizes the airflow and cooling features of the Cisco Nexus 7700 10-Slot chassis.

Table 7. Cisco Nexus 7700 10-Slot Chassis Airflow and Cooling Features

Feature

Description

Air flow

Air flows front to back.
Air enters through the perforations in the I/O and supervisor modules at the front of the chassis and exits at the rear of the chassis, making the Cisco Nexus 7700 10-Slot chassis excellent for hot-aisle and cold-aisle designs.

Fan trays

3 system fan trays.

Fan trays removable from the rear

All fan trays are removable from the rear, and hence there is no obstruction from the I/O module cabling on the front. This arrangement enables continuous system operation during maintenance.

Variable fan speeds

Current fans have 256 speed levels.
The fan speed changes based on the type of I/O module (and supervisor), the inlet temperature reading on the supervisor, and the presence or absence of an air filter.
Power consumption and noise emission by fans is optimized.

Self-healing mechanism

The software tracks the temperature of the most critical components on the I/O modules and the supervisors. If the recorded temperature is higher than a certain system-defined threshold, the fan speed automatically increases and stays at that speed until the temperature falls below the threshold.

Fan redundancy

Both system and fabric fan trays are redundant and hot swappable.
If a system fan tray is removed, the speed of the other fan increases to provide the required cooling.

Air filter

The air filter filters dust and keeps the chassis interior clean.
Use of an air filter increases the fan speed; higher fan speeds result in higher levels of noise.

The 18-slot chassis cooling system consists of three redundant system fan modules that deliver cooling for the I/O and supervisor modules as well as the fabric modules. Each fan module is composed of multiple independent fans. The fan trays are removable from the rear of the chassis, allowing continuous system operation during maintenance. Each fan module incorporates fan redundancy and fan controller redundancy that delivers resilience for either a fan or controller failure. Table 8 summarizes the airflow and cooling features of the Cisco Nexus 7700 18-Slot chassis.

Table 8. Cisco Nexus 7700 18-Slot Chassis Airflow and Cooling Features

Feature

Description

Air flow

Air flows front to back.
Air enters through the perforations in the I/O and supervisor modules at the front of the chassis and exits at the rear of the chassis, making the Cisco Nexus 7700 18-Slot chassis excellent for hot-aisle and cold-aisle designs.

Fan modules

3 system fan modules

Fan modules removable from the rear

All fan modules are removable from the rear, and hence there is no obstruction from the I/O cabling on the front. This arrangement enables continuous system operation during maintenance.

Variable fan speeds

Fans have 256 speed levels controlled by software.
The fan speed changes based on the I/O module type (and supervisor) and the inlet temperature reading on the supervisor.
Power consumption and noise emission by fans is optimized.

Self-healing mechanism

The software tracks the temperature of the most critical components of the I/O modules and the supervisors. If the recorded temperature is higher than a system-defined threshold, the fan speed automatically increases and stays at that speed until the temperature falls below the threshold.

Fan redundancy

Both fan modules incorporate fan and controller redundancy and are hot swappable.
All the fans are required for normal operation. If the software detects any fan module removal, it warns the user with a syslog message and will shut down the system in 3 minutes unless the removed fan module is replaced. Failure of an individual fan does not result in system shutdown.

Cabling and Cabinet

The cable management system for the Cisco Nexus 7700 10-Slot and 18-Slot chassis is located on both sides of the chassis aligned with the module slots.

The Cisco Nexus 7700 10-Slot and 18-Slot chassis should be installed in either a standard four-post rack or a four-post cabinet that meets the depth, total equipment weight, and network cabling requirements.

Regulatory Compliance

The Cisco Nexus 7700 10-Slot and 18-Slot chassis are designed to meet regulator emissions and immunity requirements when tested with existing and future cards and power supplies, as summarized in Table 9.

Table 9. Emissions and Immunity Specifications

Specification

Description

Regulatory compliance

EMC compliance
FCC Part 15 (CFR 47) (USA) Class A
ICES-003 (Canada) Class A
EN55022 (Europe) Class A
CISPR22 (International) Class A
AS/NZS CISPR22 (Australia and New Zealand) Class A
VCCI (Japan) Class A
KN22 (Korea) Class A
CNS13438 (Taiwan) Class A
CISPR24
EN55024
EN50082-1
EN61000-3-2
EN61000-3-3
EN61000-6-1
EN300 386

Table 10 summarizes NEBS compliance.

Table 10. NEBS Specifications

Specification

Description

Environmental standards

NEBS criteria levels*
SR-3580 NEBS Level 3 (GR-63-CORE and GR-1089-CORE)
Verizon NEBS compliance*
Telecommunications Carrier Group (TCG) Checklist
Century Link NEBS requirements*
Telecommunications Carrier Group (TCG) Checklist
ATT NEBS requirements*
ATT TP76200 level 3 and TCG Checklist
ETSI*
ETSI 300 019-1-1, Class 1.2 Storage
ETSI 300 019-1-2, Class 2.3 Transportation
ETSI 300 019-1-3, Class 3.2 Stationary Use

* Validation in Progress

The Cisco Nexus 7700 switches are designed to meet regulator safety requirements when tested with existing and future cards and power supplies, as summarized in Table 11.

Table 11. Safety Specifications

Specification

Description

Safety

UL/CSA/IEC/EN 60950-1
AS/NZS 60950

Service and Support

Cisco offers a wide range of services to help accelerate your success in deploying and optimizing the Cisco Nexus 7700 switches in your data center. Our innovative services are delivered through a unique combination of people, processes, tools, and partners and are focused on helping you increase operating efficiency and improve your data center network. Cisco Advanced Services uses an architecture-led approach to help you align your data center infrastructure with your business goals and provide long-term value. Cisco SMARTnet® Service helps you resolve mission-critical problems with direct access at any time to Cisco network experts and award-winning resources. With this service, you can take advantage of the Cisco Smart Call Home service capability, which offers proactive diagnostics and real-time alerts for your Cisco Nexus 7700 switches. Spanning the entire network lifecycle, Cisco Services helps increase investment protection, optimize network operations, provide migration support, and strengthen your IT expertise. For more information about Cisco Data Center Services, visit http://www.cisco.com/go/dcservices.

For More Information

For more information about the Cisco Nexus 7700 switches, visit the product homepage at http://www.cisco.com/go/nexus7000 or contact your local account representative.