Specifications

Chapter 2 Cisco IOS Commands
traceroute mac
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Catalyst 2950 and Catalyst 2955 Switch Command Reference
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traceroute mac
Use the traceroute mac privileged EXEC command to display the Layer 2 path taken by the packets
from the specified source MAC address to the specified destination MAC address.
tracetroute mac [interface interface-id] {source-mac-address} [interface interface-id]
{destination-mac-address} [vlan vlan-id] [detail]
Syntax Description
Defaults There is no default.
Command Modes Privileged EXEC
Command History
Usage Guidelines The Layer 2 traceroute feature is available on these switches:
• Catalyst 2950 switches running Release 12.1(12c)EA1 or later
• Catalyst 2955 switches running Release 12.1(12c)EA1 or later
• Catalyst 3550 switches running Release 12.1(12c)EA1 or later
• Catalyst 4000 switches running Catalyst software Release 6.2 or later for the supervisor engine
• Catalyst 5000 switches running Catalyst software Release 6.1 or later the supervisor engine
• Catalyst 6000 switches running Catalyst software Release 6.1 or later the supervisor engine
For Layer 2 traceroute to functional properly, Cisco Discovery Protocol (CDP) must be enabled on all
the switches in the network. Do not disable CDP.
When the switch detects a device in the Layer 2 path that does not support Layer 2 traceroute, the switch
continues to send Layer 2 trace queries and lets them time out.
The maximum number of hops identified in the path is ten.
interface interface-id (Optional) Specify an interface on the source or destination switch.
source-mac-address Specify the MAC address of the source switch in hexadecimal format.
destination-mac-address Specify the MAC address of the destination switch in hexadecimal format.
vlan vlan-id (Optional) Specify the VLAN on which to trace the Layer 2 path that the
packets take from the source switch to the destination switch. Valid VLAN
IDs are from 1 to 1005 when the standard software image (SI) is installed
and 1 to 4094 when the enhanced software image (EI) is installed . Do not
enter leading zeros.
detail (Optional) Specify that detailed information appears.
Release Modification
12.1(12c)EA1 This command was first introduced.