Cisco Systems 3560X Manual De Usuario
13-13
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 13 Configuring Interface Characteristics
Using the Switch USB Ports
possible, to maintain high performance, forwarding is done by the switch hardware. However, only IPv4
packets with Ethernet II encapsulation are routed in hardware. Non-IP traffic and traffic with other
encapsulation methods are fallback-bridged by hardware.
packets with Ethernet II encapsulation are routed in hardware. Non-IP traffic and traffic with other
encapsulation methods are fallback-bridged by hardware.
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The routing function can be enabled on all SVIs and routed ports. The switch routes only IP traffic.
When IP routing protocol parameters and address configuration are added to an SVI or routed port,
any IP traffic received from these ports is routed. For more information, see
When IP routing protocol parameters and address configuration are added to an SVI or routed port,
any IP traffic received from these ports is routed. For more information, see
and
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Fallback bridging forwards traffic that the switch does not route or traffic belonging to a nonroutable
protocol, such as DECnet. Fallback bridging connects multiple VLANs into one bridge domain by
bridging between two or more SVIs or routed ports. When configuring fallback bridging, you assign
SVIs or routed ports to bridge groups with each SVI or routed port assigned to only one bridge
group. All interfaces in the same group belong to the same bridge domain. For more information,
see
protocol, such as DECnet. Fallback bridging connects multiple VLANs into one bridge domain by
bridging between two or more SVIs or routed ports. When configuring fallback bridging, you assign
SVIs or routed ports to bridge groups with each SVI or routed port assigned to only one bridge
group. All interfaces in the same group belong to the same bridge domain. For more information,
see
Note
Routing and fallback bridging are not supported on switches running the LAN base feature set.
Using the Switch USB Ports
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USB Mini-Type B Console Port
The switch has two console ports available—a USB mini-Type B console connection and an RJ-45
console port. Console output appears on devices connected to both ports, but console input is active on
only one port at a time. The USB connector takes precedence over the RJ-45 connector.
console port. Console output appears on devices connected to both ports, but console input is active on
only one port at a time. The USB connector takes precedence over the RJ-45 connector.
Note
Windows PCs require a driver for the USB port. See the hardware installation guide for driver
installation instructions.
installation instructions.
Use the supplied USB Type A-to-USB mini-Type B cable to connect a PC or other device to the switch.
The connected device must include a terminal emulation application. When the switch detects a valid
USB connection to a powered-on device that supports host functionality (such as a PC), input from the
RJ-45 console is immediately disabled, and input from the USB console is enabled. Removing the USB
connection immediately reenables input from the RJ-45 console connection. An LED on the switch
shows which console connection is in use.
The connected device must include a terminal emulation application. When the switch detects a valid
USB connection to a powered-on device that supports host functionality (such as a PC), input from the
RJ-45 console is immediately disabled, and input from the USB console is enabled. Removing the USB
connection immediately reenables input from the RJ-45 console connection. An LED on the switch
shows which console connection is in use.
Console Port Change Logs
At software startup, a log shows whether the USB or the RJ-45 console is active. Each switch in a stack
issues this log. Every switch always first displays the RJ-45 media type.
issues this log. Every switch always first displays the RJ-45 media type.
In the sample output, switch 1 has a connected USB console cable. Because the bootloader did not
change to the USB console, the first log from switch 1 shows the RJ-45 console. A short time later, the
console changes and the USB console log appears. Switch 2 and switch 3 have connected RJ-45 console
cables.
change to the USB console, the first log from switch 1 shows the RJ-45 console. A short time later, the
console changes and the USB console log appears. Switch 2 and switch 3 have connected RJ-45 console
cables.