Cisco WS-X6248-RJ-45 - Catalyst 6000 Expansion Module Manual de usuario descargar pdf (Pagina 13)

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Switch Management

While the direct console cable connection is a useful way for managing a Cisco Catalyst 6500, other methods of

network-based management (such as telnet or SNMP) require a management interface with which to access the

switch. In CatOS, a single management interface, sc0, is available for the system. An IP address and VLAN are

assigned to this interface. Any IP-based management of a CatOS system is then directed to the sc0 interface address.

With the hybrid OS, the sc0 interface is used in conjunction with any Layer 3 VLAN interfaces created for routing

functionality.

In the Cisco IOS Software, the concept of a sc0 interface does not exist; however, network-based management of the

switch is still possible. For every Layer 2 VLAN that is created, there can also be a corresponding Switch Virtual

Interface(SVI,whichis discussed further in the following section). Each SVI can haveoneormoreIPaddresses which

are used for accessing the device on the particular VLAN. A SNMP or telnet client can access the device via this

method. The followingcommand displays the VLAN SVIs and the associated IPaddressing for managing the system.

Switch Configuration

Conﬁguration changes in the Catalyst software are written to NVRAM immediately after a change is made. The user

does not need to manually save conﬁguration changes to memory. All conﬁguration in the Catalyst OS is done via a

“set” command sequence. The set commands are done from the enabled-mode prompt. You can erase a particular

command with a clear command from the same prompt.

In contrast, Cisco IOS Software does not save conﬁguration changes to NVRAM unless you issue the copy run start

(or write memory) command. So unless the user explicitly saves the conﬁguration, any changes to the conﬁguration

will be lost should the system be reloaded. All command line conﬁguration in Cisco IOS (whether on the Supervisor

or the MSFC) is done from the conﬁguration mode, commonly known as “conﬁg-t”. You can remove a particular

command with the no form of the original command.

Port Behavior

The following section details the differences in port behavior between the Catalyst software and the Cisco

IOS Software.

CatOS> (enable) show interface

sl0: flags=51<UP,POINTOPOINT,RUNNING>

slip 0.0.0.0 dest 0.0.0.0

sc0: flags=63<UP,BROADCAST,RUNNING>

vlan 1 inet 10.1.1.54 netmask 255.255.255.0 broadcast 10.1.1.255

IOS#show ip interface brief

Interface IP-Address OK? Method Status Protocol

Vlan1 20.1.1.1 YES manual up up

Vlan10 30.1.1.1 YES manual up down

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Cisco WS-X6248-RJ-45 - Catalyst 6000 Expansion Module Manual de usuario Pagina 13