Cisco 7200 VXR User Manual page 60

Chapter 1 Cisco 7200 VXR Product Overview
Functional Overview
The Media Access Control (MAC)-layer or hardware address is a standardized
data link layer address that is required for certain network interface types. These
addresses are not used by other devices in the network; they are specific and
unique to each port. The Cisco 7200 VXR routers use a specific method to assign
and control the MAC-layer addresses of its port adapters. For a description of the
MAC-layer address, see the "MAC-Layer Address" section on page 1-62.
Port adapter slots maintain the same slot number regardless of whether other port
adapters are installed or removed. However, when you move a port adapter to a
different slot, the port adapter slot number changes to reflect the new slot number.
You can identify port adapter slots by using software commands. To display
information about all port adapter slots, use the show interfaces command. To
display information about a specific port adapter slot, use the show interfaces
command with the port adapter type and slot number in the format
show interfaces port-adapter-type slot-number/port-number. If you abbreviate
the command (sh int) and do not specify port adapter type and slot number (or
arguments), the system interprets the command as show interfaces and displays
the status of all port adapters and ports.
The following example shows how the show interfaces command, used without
arguments, displays status information (including the physical port adapter
number) for each port adapter in a Cisco 7206VXR.
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