Cisco WS-X6248-RJ-45 - Catalyst 6000 Expansion Module Manual de usuario descargar pdf (Pagina 2)

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Service (QoS), security, multicast,and network management of the Policy Feature Card (PFC), but does not have

any routing capabilities. Layer 3 routing functionality is provided via a Cisco IOS Software image on the optional

MSFC routing engine. In this paper, the combination of CatOS on theSupervisor Engineand Cisco IOS Software

on the MSFC is referred to as the “hybrid” OS, meaning that two operating systems work together to provide

complete Layer 2/3/4 system functionality.

The hybrid model operates based on two operating images, two conﬁgurations, and two command lines; one of

each for CatOS and the Cisco IOS Software. The default operation of CatOS is as a switch (all ports bridging in

VLAN 1), but can be conﬁgured to operate as a router.

This operating model, as a Layer 2 forwarding device, targets wiring closet or access layer services with protocols

such as IEEE 802.1x, inline power, and voice virtual LAN (VLAN) identiﬁcation. With the optional MSFC, the

chassis is suitable for distribution or core layers of a network.

• Cisco IOS Software for the Supervisor Engine on the Cisco Catalyst 6500 Series provides a single Cisco IOS

image, conﬁguration, and command line to support all Layer 2, 3, and 4 functionality on the switch. Cisco IOS

has historically been a Layer 3 operating system on routing platforms; Cisco IOS on the supervisor of a Cisco

Catalyst 6500 has expanded these capabilities to include true Layer 2 functionality as well. Cisco IOS requires a

MSFC daughter card be present onthe Supervisor Engine. In this paper, the term“Cisco IOS” refers to the Cisco

IOS Software on the Supervisor Engine of the Cisco Catalyst 6500 Series.

The default operation of the Cisco IOS Software is as a router (all ports are routed and shutdown), but can be

conﬁgured to operate as a switch.

The Cisco IOS operating mode targets service provider and enterprise data center backbones and distribution

layer services. Cisco IOS Software combines the switching features of the CiscoCatalyst 6500 Series Switch with

routing features of Cisco IOS Software to create a single, integrated operating system that performs all switching

androuting functionality. ACiscoIOS systemhasthe capabilitytoscale the throughputandbandwidth ofaCisco

Catalyst 6500 Series to 210 Mpps and 256 Gbps, respectively. This provides operational ease of use by allowing

customers to deploy a single image across their Cisco Catalyst 6500 Series product line.

Both operating models can exist simultaneously in a network environment to satisfy varying requirements. One

model is recommended over another based solely on featuresupport, becauseboth models are not at 100 percent

feature parity. One model is not a replacement for another, because both will continue feature development.

Figure 1 illustrates the two operating systems in a typical network architecture.

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Cisco WS-X6248-RJ-45 - Catalyst 6000 Expansion Module Manual de usuario Pagina 2