Cisco WS-X6248-RJ-45 - Catalyst 6000 Expansion Module Manual de usuario descargar pdf (Pagina 14)

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CatOS and Cisco IOS Software on the MSFC

Before considering the Cisco IOS port concepts, a look at CatOS port concepts is used for a comparison of the two

operating systems. The hybrid model offers a very tight integration of the Layer 2/4 CatOS features with the Layer

3 Cisco IOS on the MSFC features. Layer 2 ports (such as access and trunk ports) and VLANs are conﬁgured with

the CatOS command set and Layer 3 VLAN interfaces are conﬁgured with the Cisco IOS Software on the MSFC

command set. As ports are conﬁgured in Layer 2 VLANs with CatOS (set vlan x <slot/port>), you must create a

corresponding Layer 3 SVI to enable inter-VLAN routing for the particular VLAN. You create SVIs using the

interfacevlancommand. In the hybrid model, theMSFCoperatesonthese logical interfaces (interface vlan 10)rather

than physical interfaces (interface gig 1/1). Figure 3 illustrates these concepts and the associated commands to use

Layer 2 or Layer 3 functionality.

Figure 3

Port Concepts in the Hybrid Model

Cisco IOS Software

The port concepts in the Cisco IOS Software model are similar to the hybrid software model. In the Cisco IOS model,

all system conﬁguration is done from a single command-line interface; so there is no separation between the Layer 2

and Layer 3 conﬁguration. The Layer 2 port concepts, such as access and trunk ports and Layer 3 VLAN interfaces

(SVIs), still apply, although with somewhat different syntax. Cisco IOS Software offers the concept of a Layer 3

routed interface, as well. Table 6 provides an overview ofthedifferent Cisco IOS port and interface types, and a more

detailed description follows.

VLAN 2

Workstation

VLAN 3

Workstation

VLAN 3

Workstation Switch

VLAN 4

Workstation

Access Ports

Physical

Ports

Layer 2

Bridging

Layer 3

Routing

Trunk Port Access Port

set trunk 2/4 dot1q set vlan 4 2/5set vlan 2 2/1

SVI SVI SVI

Route

Processor

interface vlan 2

ip address 10.2.1.1/24

interface vlan 3

ip address 10.3.1.1/24

interface vlan 4

ip address 10.4.1.1/24

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 41 42

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