Cisco EtherSwitch Service Modules Feature Guide
How to Configure the Cisco EtherSwitch Service Module
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Cisco IOS Release 12.2(25)SEC
The interface numbering format on the Cisco EtherSwitch service module is
stack-member-number/0/switch-port. For more detailed information about interface types, see the
Catalyst 3750 Switch Software Configuration Guide, Cisco IOS Release 12.2 at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/index.htm
Using Interface Configuration Mode
You can configure th e individual Cis co EtherSwitch service module physical interfaces (ports) through
the interface configuration mode on the CLI. The port numbering scheme that you use in interface
configuration mode is interface type stack member number/0/port number.
Note For Cisco EtherSwitch service modules or switches that do not have StackWise interfaces, the stack
member number is 1 by default but changeable through Cisco IOS software or bootloader.
•Type—Fast Ethernet (fastethernet or fa) for 10/100-Mbps Ethernet or Gigabit Ethernet
(gigabitethernet or gi) for 10/100/1000-Mbps Ethernet ports.
•Stack member number—The number used to identify the Cisco EtherSwitch service module or
switch within the stack. The Cisco EtherSwitch service module or switch number ranges from 1 to
9 and is assigned the first time the service module or switch initializes. The default Cisco
EtherSwitch service module or switch number, before it is integrated into a switch stack, is 1; when
a service module or switch has been assigned a stack member number, it keeps that number until
another is assigned to it.
You can use the Cisco EtherSwitch service module or switch port LEDs in stack mode to identify
the stack member number of a service module or switch.
•Module number—The module slot number on the Cisco EtherSwitch service module or switch
(always 0 on the service module or switch).
•Port number—The interface number on the Cisco EtherSwitch service module or switch. The port
numbers always begin at 1, starting at the right when facing the front of the Cisco EtherSwitch
service module, for example, fastethernet 1/0/1, fastethernet 1/0/2, gigabitethernet 1/0/1,
gigabitethernet 1/0/2 with 1/0/1 on the top, 1/0/2 on the bottom, 1/0/3 on the top, 1/0/4 on the bottom
and so on.
You can identify physical interfaces by physically checking the interface location on the
Cisco EtherSwitch service module. You can also use the Cisco IOS show privileged EXEC commands
to display information about a specific interface or all the interfaces on the Cisco EtherSwitch
service module.
These are examples of specifying interfaces:
•To specify Gigabit Ethernet port 4 on a standalone Cisco EtherSwitch service module, enter this
command in global configuration mode:
Enhanced EtherSwitch (config)# interface gigabitethernet1/0/4
•To specify Fast Ethernet port 4 on stack member 3, enter this command in global configuration
mode:
Enhanced EtherSwitch (config)# interface fastethernet3/0/4
For more detailed information about configuring interfaces, see the Catalyst 3750 Switch Software
Configuration Guide, Cisco IOS Release 12.2 at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/index.htm