Cisco 7600 Series Routers

Cisco 7600 Series - Catalyst 6500 Series Enhanced FlexWAN Module Data Sheet

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The Cisco® 7600 Series/Catalyst® 6500 Series Enhanced FlexWAN module (Enhanced FlexWAN) enables high-performance, intelligent metropolitan-area network (MAN) and WAN services. Enterprises and service providers can take advantage of the many types of the Cisco 7000 Series common port adapters for their WAN aggregation and connectivity options, as well as the increased scalability, performance, and rich quality of service (QoS) features offered by the Cisco Enhanced FlexWAN module.

Figure 1.      The Cisco 7600 Series/Catalyst 6500 Series Enhanced FlexWAN module

Product Overview

The Cisco Enhanced FlexWAN module (Figure 1) enables high-performance, intelligent WAN and MAN service scalability for both enterprises and service providers. The Cisco Enhanced FlexWAN module supports a variety of clear-channel and channelized WAN interfaces, including T1/E1, T3/E3, High-Speed Serial Interface (HSSI), T3/E3 ATM, OC-3 ATM, and OC-3 packet over SONET (POS), with the ability to directly interface with high-speed SONET equipment for MANs and WANs.

The Cisco Enhanced FlexWAN module accepts up to two WAN port adapters commonly used with the Cisco 7200 and 7500 Series Routers, providing an easy migration path for Cisco customers from the Cisco 7500 Series to the Cisco 7600 Series. In addition, the Cisco Enhanced FlexWAN module adds switch fabric connectivity, offers increased performance and memory compared to the existing FlexWAN module, and supports advanced features targeted at Metropolitan (Metro) Ethernet markets. This new innovative architecture is designed to deliver numerous media options and enable scalable, distributed, intelligent network services for the next generation of applications.


WAN, MAN, and LAN Service Convergence

A hallmark of the Cisco 7600 Series and the Cisco Catalyst 6500 Series is the flexibility to support multiple applications on the same platform, delivering “no-compromise” convergence for a range of applications, including data center, MAN, and WAN edge. The Cisco Enhanced FlexWAN module simplifies network design and deployment by allowing consolidation of LAN, WAN, and MAN interfaces into a single, highly scalable platform. The Cisco 7600 Series and Cisco Catalyst 6500 Series deliver advanced flexibility, supporting any mix of media or traffic within a common system, software, and chassis, thereby easing and simplifying network configuration and installation tasks, and speeding service delivery. Converged data, voice, and video traffic can be transported transparently from end to end across an interconnected LAN, WAN, or MAN, with the ability to manage thousands of simultaneous traffic flows at wire speed with granular QoS and security control.

WAN Aggregation

The Cisco Enhanced FlexWAN module enables the Cisco 7600 Series Router and Cisco Catalyst 6500 Series Switch to do high-end WAN aggregation, including that based on point-to-point circuits, Frame Relay, Point-to-Point Protocol (PPP), High-Level Data Link Control (HDLC), ATM, or POS. The rich QoS features and distributed processing attributes of the Cisco Enhanced FlexWAN module make it a cornerstone of a highly scalable WAN aggregation solution. Higher-layer applications can easily be supported on this end-to-end network to allow intelligent data, voice, video, and security services—all on the same platform to provide integrated easy-to-use application delivery and control. Figure 2 illustrates a Cisco 7600 or a Cisco Catalyst 6500 deployed as a head-end router for WAN aggregation.

Figure 2.      WAN Aggregation

Key Features and Benefits

The Cisco Enhanced FlexWAN module offers the ability to consolidate LAN, WAN, and MAN services into a single platform and lowers the total cost of ownership of the network through simplified design and ease of network management and maintenance.

Scalable Bandwidth with Intelligent Network Services for Next-Generation Applications

The unique value proposition of the Cisco 7600 Series and the Cisco Catalyst 6500 Series is the convergence supported from the physical layer to a highly scalable application layer. These two platforms can scale from 10 Megabit Ethernet to 10 Gigabit Ethernet in the LAN and DS-0 to OC-48/STM-16 in the WAN. Differentiated Services (DiffServ) and IP Precedence priority packet marking along with QoS classification, policing, queuing, intelligent packet discard, and security access control on every port ensure that the platform will meet the demands of any network environment.

Included in the rich QoS features is the capability to guarantee bandwidth to business-critical applications; limit bandwidth to non-critical applications; drop selective, low-priority packets to avoid congestion; and mark packets to control QoS for any type of traffic flows. In addition, the Cisco Enhanced FlexWAN module supports several key features required for low-speed WAN aggregation, such as compressed Real-Time Protocol (cRTP) and distributed link fragmentation and interleaving (LFI).

Lower Cost of Ownership

A major benefit of LAN, WAN, and MAN consolidation on the Cisco 7600 Series and Cisco Catalyst 6500 Series is the reduction in the number of platforms to deploy and manage in any given network. This service convergence not only simplifies network design and configuration, it also decreases rack space and power requirements as well as the training and administrative burden associated with managing many different platforms. Additionally, such integration eases the support burden placed on a maintenance staff because spare parts for multiple platforms do not need to be stocked or managed.

The Cisco Enhanced FlexWAN module also provides considerable investment protection for the large installed base of Cisco 7200 and 7500 Series Routers. These same WAN port adapters can be deployed on the Cisco 7600 Series and Cisco Catalyst 6500 Series for immediate service delivery and scaling to much higher levels of system performance and bandwidth.

These benefits directly translate to reduced costs of ownership—reduced capital costs of procurement and reduced ongoing operational costs of network management, such as training, element management, and inventory and configuration management. In addition to requiring fewer platforms to manage, a converged solution from Cisco Systems® provides management of all LAN, WAN, and MAN functions with the same network management tool set, easing the number of management platforms required.

Table 1.       Features and Benefits of Cisco Enhanced FlexWAN Module



Enhanced FlexWAN



Medium performance

High performance

Targets the granular DS-0 to the high-end OC-3 market

Number of CPUs

2 CPUs, one per bay

2 CPUs, one per bay

Offers a high-performance, independently scalable solution across the 2-port adapter bays

Memory default

Memory upgrade option

64 MB per bay

Total 128 MB per FlexWAN module

128 MB maximum per bay

256 MB per bay

Total 512 MB per Enhanced FlexWAN module

512 MB maximum per bay

Enables support of large routing tables, rich QoS features, and increased scalability

Switch fabric connectivity



Enables the use of 256- or 720-Gbps switch fabric modules for data forwarding

Online insertion and removal (OIR) of module



Increases high availability, and provides operational ease of use

Product Specifications

Table 2.       Product Specifications




Cisco Catalyst Supervisor Engine 2 and Supervisor Engine 720 systems

Minimum software compatibility

Cisco IOS® Software Release 12.2(17a)SXA or later releases for Supervisor Engine 720; Cisco IOS Software Release 12.2(17a)SXB or later releases for Supervisor Engine 2-based systems


TCP, IPv4, IPv6, Multiprotocol Label Switching (MPLS), Ethernet over MPLS (EoMPLS), Frame Relay over MPLS (FRoMPLS), ATM over MPLS (ATMoMPLS)


Frame Relay, Multilink Frame Relay—FRF.16, Multilink Point-to-Point Protocol (MLPPP), HDLC, ATM, HSSI, generic routing encapsulation (GRE) (supported on HSSI and Frame Relay interfaces)

Cards, ports, and slots

2-port adapter bays per Cisco Enhanced FlexWAN module

Features and benefits

  Higher performance—Doubles the packet forwarding performance over the previous-generation FlexWAN module
  Switch fabric connectivity—Allows system scalability up to 720 Gbps by offering switch fabric connectivity
  Increased packet memory—Increases the memory to 512 MB per bay, from 128 MB per bay supported in the previous-generation FlexWAN; this enables support of large routing tables, rich QoS features, and increased scalability
  OIR of the Cisco Enhanced FlexWAN module

QoS, ACLs, and Low-Speed Aggregation Features


  Standard, extended, dynamic, reflexive, and time-based access control lists (ACLs)


  IP Precedence
  Differentiated services code point (DSCP) (IPv6 and IPv4)
  MPLS experimental values (MPLS EXP)

Congestion avoidance

  Weighted Random Early Detection (WRED)

Congestion management

  Per-virtual circuit queuing
  Low-latency queuing (LLQ)
  Weighted Fair Queuing (WFQ)
  Class-Based Weighted Fair Queuing (CBWFQ)

Traffic classification, shaping, and bandwidth policing

  Distributed traffic shaping (DTS)
  Hierarchical traffic shaping
  Network-based application recognition (NBAR)

Bandwidth efficiency



  Distributed LFI (dLFI)
  Frame Relay Forum FRF.12

Voice over Frame Relay

  Frame Relay Forum FRF.11


  RFCs 1483 and 2684 ATM Bridging

ATM permanent-virtual-circuit (PVC) bundles

Unsupported features

  Frame Relay traffic shaping (FRTS), ISDN, Frame Relay switching, Layer 2 Tunneling Protocol (L2TP), Layer 2 Forwarding (L2F), Point-to-Point Tunneling Protocol (PPTP)
  Frame Relay switched virtual circuits (SVCs)
  Multi-chassis Multilink PPP
  Systems Network Architecture (SNA) serial protocols (Synchronous Data Link Control [SDLC], Frame Relay Access Support [FRAS], binary network node [BNN], and boundary access node [BAN])
  FRF.5, FRF.8, FRF. 9, and FRF.15
  POS channel bonding
  QoS groups


  256-MB default Double Data Rate (DDR) synchronous dynamic RAM (SDRAM) memory per bay
  Optionally upgradable to 512 MB DDR SDRAM memory per bay

Supported port adapters















T3/E3 and STM-1




































Unsupported port adapters

Dual-wide adapters, voice, Token Ring, Fiber Distributed Data Interface (FDDI), encryption, compression, Fibre Channel

Environmental conditions

  Operating temperature: 32 to 104°F (0 to 40°C)
  Storage temperature: –40 to 167°F (–40 to 75°C)
  Relative humidity: 10 to 90%, noncondensing
  Operating altitude: –60 to 2000m

Reliability and availability

Mean time between failures: 7 years for system configuration


  Cisco Entity Asset MIB
  Cisco Entity Field-Replaceable Unit (FRU) Control MIB
  Cisco Entity Alarm MIB
  Interface IF MIB (RFC 2233)
  DS-3 MIB (RFC 1407)
  DS-1 MIB (RFC 1406)
  Frame Relay MIB (RFC 1315)
  Cisco Frame Relay MIB
  ATM MIB (RFC 1695)
  Definitions of Managed Objects for Bridges (RFC 1493)
  Evolution of Interfaces Group of MIB-II (RFC 1573)
  Simple Network Management Protocol (SNMP) MIB II (RFC 1213)
  Remote Monitoring (RMON) MIB (RFC 1757)
  Switch Monitoring (SMON) MIB

Network management

Supported with CiscoWorks—CiscoView, CiscoWorks Resource Manager Essentials (RME)

Cisco VPN Solution Center (VPNSC)

Physical specifications

Occupies one slot in a Cisco 7600 Series Router or Cisco Catalyst 6500 Series Switch

Supports up to 12 Enhanced FlexWAN modules in a 13-slot chassis

Requires Supervisor Engine 2 with Multilayer Switch Feature Card 2 (MSFC2) and Policy Feature Card 2 (PFC2) or Supervisor Engine 720

Dimensions (H x W x D): 1.75 x 15.375 x 16 in.

Weight: 8.4 lb


135 watts power consumption per Enhanced FlexWAN module, 170 watts maximum power consumption with two port adapters


Enhanced FlexWAN module status: green (operational); orange (faulty)

Regulatory compliance

CE marking


  UL 60950
  CSA C22.2 No. 60950
  IEC 60950


  FCC Part 15 Class A
  ICES-003 Class A
  VCCI Class A
  EN55022 Class A
  CISPR22 Class A
  AS/NZS3548 Class A
  ETS-300 386



  ITU-T G.610
  ITU-T G.703
  ITU-T G.707
  ITU-T G.783 Sections 9-10
  ITU-T G.784
  ITU-T G.803
  ITU-T G.813
  ITU-T G.825
  ITU-T G.826
  ITU-T G.841
  ITU-T G.957 Table 3
  ITU-T G.958
  ITU-T I.361
  ITU-T I.363
  ITU I.432
  ITU-T Q.2110
  ITU-T Q.2130
  ITU-T Q.2140
  ITU-T Q.2931
  ITU-T O.151
  ITU-T O.171
  ETSI ETS 300 417-1-1
  ACA TS 026 (1997)
  BABT /TC/139 (Draft 1e)

Availability and Ordering

Table 3.       Ordering Information


Part Number

Cisco 7600 Series/Catalyst 6500 Series Enhanced FlexWAN module


Cisco 7600 Series/Catalyst 6500 Series Enhanced FlexWAN module, spare


Cisco 7600 Series/Catalyst 6500 Series Enhanced FlexWAN module 256-MB memory


Cisco 7600 Series/Catalyst 6500 Series Enhanced FlexWAN module 256-MB memory, spare


Cisco 7600 Series/Catalyst 6500 Series Enhanced FlexWAN module 512-MB memory


Cisco 7600 Series/Catalyst 6500 Series Enhanced FlexWAN module 512-MB memory, spare


Service and Support

Cisco offers numerous service and support offerings for both service provider and enterprise customers. Cisco has earned the highest customer satisfaction ratings in the industry by providing the world-class service and support necessary to deploy, operate, and optimize networks. Whether the goal is speed to market, maximizing network availability, or enhancing customer satisfaction and retention, Cisco is committed to the success of its customers.

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