Getting Started

You must enter privileged mode to perform most of the tasks described in this publication. Enter the enable command to enter privileged mode.

To connect to the switch through the console port and to enter privileged mode, perform this task:

Task	Command
Step 1 Make sure the terminal connected to the console port is configured as follows: 9600 baud, 8 data bits, no parity, 1 stop bit.	-
Step 2 Power up the switch. Output from the bootup script appears on the terminal screen.	-
Step 3 At the Enter Password prompt, press Return.	-
Step 4 Enter privileged mode.	enable
Step 5 At the Enter Password prompt, press Return.	-

This example shows the end of the bootup cycle and how to enter privileged mode. By default, both the normal and privileged mode passwords are not set; press Return at the Enter Password prompts. The output on your switch might look different, depending on the switch model you are booting.

<...output truncated...>
Exiting Off-line Diagnostics
 
IP address for Catalyst not configured
BOOTP will commence after the ports are online
Ports are coming online ...
 
 
Cisco Systems, Inc. Console
 
 
 
 
Enter password: 
1999 Apr 08 15:35:14 %SYS-5-MOD_OK:Module 1 is online
1999 Apr 08 15:35:17 %SYS-5-MOD_OK:Module 2 is online
1999 Apr 08 15:35:17 %SYS-5-MOD_OK:Module 3 is online
<Return>
Console> enable
 
Enter password: <Return>
Console> (enable)

When configuring the switch for the first time, the in-band (sc0) interface is assigned to the default VLAN, VLAN 1.

After you have configured additional VLANs, you can assign the interface to any VLAN. Make sure the IP address you specify belongs to the IP subnet associated with that VLAN, and that you configure an appropriate default gateway for that subnet.

To set the switch IP configuration, perform this task in privileged mode:

Task	Command
Step 1 Assign an IP address and subnet mask to the switch.	set interface sc0 ip_addr netmask
Step 2 (Optional) Assign the switch interface to a VLAN. (If you do not specify a VLAN, VLAN 1 is used.)	set interface sc0 vlan_num
Step 3 Specify one or more default gateways to the switch. The default gateway address should be the address of a router in the same subnet/VLAN as the switch IP address.	set ip route default gateway
Step 4 Verify the in-band interface configuration.	show interface
Step 5 Verify the default gateway assignment.	show ip route

This example shows how to assign an IP address and default gateway to the switch, and verify the configuration:

Console> (enable) set interface sc0 10.10.1.20/24
Interface sc0 IP address set.
Console> (enable) set ip route default 10.10.1.1
Route added.
Console> (enable) show interface
sl0: flags=50<DOWN,POINTOPOINT,RUNNING>
        slip 0.0.0.0 dest 0.0.0.0
sc0: flags=63<UP,BROADCAST,RUNNING>
        vlan 1 inet 10.10.1.20 netmask 255.0.0.0 broadcast 10.255.255.255
me1: flags=62<DOWN,BROADCAST,RUNNING>
        inet 0.0.0.0 netmask 255.0.0.0 broadcast 0.0.0.0
Console> (enable) show ip route
Fragmentation   Redirect   Unreachable
-------------   --------   -----------
enabled         enabled    enabled 
 
The primary gateway: 10.10.1.1
Destination      Gateway          RouteMask    Flags   Use       Interface
---------------  ---------------  ----------   -----   --------  ---------
default          10.10.1.1        0x0          UG      0           sc0
10.0.0.0         10.10.1.20       0xff000000   U       11          sc0
Console> (enable)

In most cases, the default port configuration is adequate. If you have trouble communicating with the connected device, check the port configuration on both ends of the link.

Gigabit Ethernet ports (and some Fast Ethernet ports) support flow control and link negotiation. In most cases, you do not need to change the default configuration.

To change the port configuration, perform this task in privileged mode:

Task	Command
Step 1 On 10/100-Mbps Fast Ethernet ports, you can explicitly set the port speed or you can use the auto keyword to allow the port to autonegotiate both port speed and duplex mode with the connected port.	set port speed mod_num/port_num {10 | 100 | auto}
Step 2 On Ethernet or Fast Ethernet ports, set the port duplex mode. Make sure the duplex mode is the same on both ends of the link.	set port duplex mod_num/port_num {full | half}
Step 3 On Fast or Gigabit Ethernet ports (on supported hardware), set the flow control mode for transmit (Tx) and receive (Rx).	set port flowcontrol mod_num/port_num {receive | send} {on | off | desired}
Step 4 On Fast or Gigabit Ethernet ports (on supported hardware), configure link negotiation.	set port negotiation mod_num/port_num {enable | disable}
Step 5 Set the port name, if desired.	set port name mod_num/port_num name_string
Step 6 Verify the port configuration.	show port mod_num/port_num

This example shows how to configure the port speed, duplex mode, and port name on a 10/100-Mbps Fast Ethernet port, and how to verify the port configuration:

Console> (enable) set port speed 6/1 100 
Port(s) 6/1 speed set to 100Mbps.
Console> (enable) set port duplex 6/1 full
Port(s) 6/1 set to full-duplex.
Console> (enable) set port name 6/1 Sparc Ultra
Port 6/1 name set.
Console> (enable) show port 6/1                
Port  Name               Status     Vlan       Level  Duplex Speed Type
----- ------------------ ---------- ---------- ------ ------ ----- ------------
6/1   Sparc Ultra        connected  trunk      normal   full   100 10/100BaseTX
 
<...output truncated...>
 
Last-Time-Cleared
--------------------------
Thu Apr 30 1999, 18:38:59
Console> (enable)