Management-Only Interface; Using Interface Configuration Mode - Cisco WS-C3020 Software Configuration Manual

Chapter 9 Configuring Interface Characteristics
The switch supports basic routing (static routing and RIP). Whenever possible, to maintain high
performance, forwarding is done by the switch hardware. However, only IP Version 4 packets with
Ethernet II encapsulation can be routed in hardware. Non-IP traffic and traffic with other encapsulation
methods can be fallback-bridged by hardware.
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
Unicast Routing."

Management-Only Interface

The Fast Ethernet 0 (fa0) interface is an internal connection to the HP Onboard Administrator and is only
used for switch management traffic, not for data traffic. It is connected to the Onboard Administrator
through the blade server backplane connector. Management information that is sent to or received from
this interface is not sent to the other Ethernet interfaces on the switch. This interface cannot send or
receive data traffic from the servers that are connected to Gigabit interfaces 0/1 to 0/16. The speed and
duplex settings for this interface are fixed at 100 Mpbs and full duplex.
The fa0 interface is a routed interface. You can use the IP addresses that are assigned to this interface to
manage the switch through the HP Onboard Administrator module. By default, the fa0 interface is
assigned an IP address through a DHCP server. You can also statically configure the IP address. You can
see the IP address that is assigned to the fa0 interface from the Onboard Administrator GUI, through
which you can manage the switch through the HP Onboard Administrator module.
We recommend that you set up your network so that you can communicate with the assigned fa0 IP
address from the same external network in which the HP Onboard Administrator is located. For more
information on the IP routing and IP forwarding capabilities of the HP Onboard Administrator module,
see the HP BladeSystem documentation at http://www.hp.com/go/bladesystem/documentation.
If you do not want to manage the switch through the HP Onboard Administrator module, you can disable
the fa0 interface by using the shutdown interface configuration command.
The fa0 interface does not route its received IP packets to the IP Address that is assigned to other VLAN
interfaces on the switch. IP packets that are received by the VLAN interfaces are not routed to the fa0
interface. The fa0 interface is a routed interface, but the switch does not route IP data packets.

Using Interface Configuration Mode

The switch supports these interface types:
•
•
•
You can also configure a range of interfaces (see the
page
To configure a physical interface (port), specify the interface type, module number, and switch port number,
and enter interface configuration mode.
•
OL-8915-03
Physical ports—switch ports and routed ports
VLANs—switch virtual interfaces
Port channels—EtherChannel interfaces
9-9).
Type—Gigabit Ethernet (gigabitethernet or gi) for 10/100/1000 Mb/s Ethernet port or small
form-factor pluggable (SFP) module Gigabit Ethernet interfaces.
"Configuring a Range of Interfaces" section on
Cisco Catalyst Blade Switch 3020 for HP Software Configuration Guide

Using Interface Configuration Mode

Chapter 34, "Configuring IP
9-7