Cisco Catalyst 2950 Command Reference

Chapter 2 Catalyst 2950 and 2955 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 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.
Layer 2 traceroute supports only unicast source and destination MAC addresses. If you specify a
multicast source or destination MAC address, the physical path is not identified, and an error message
appears.
The traceroute mac command output shows the Layer 2 path when the specified source and destination
addresses belong to the same VLAN. If you specify source and destination addresses that belong to
different VLANs, the Layer 2 path is not identified, and an error message appears.
If the source or destination MAC address belongs to multiple VLANs, you must specify the VLAN to
which both the source and destination MAC addresses belong. If the VLAN is not specified, the path is
not identified, and an error message appears.
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. The range is
1 to 4094.
detail (Optional) Specify that detailed information appears.
Release Modification
12.1(12c)EA1 This command was introduced.

Cisco Catalyst 2950 Specifications

General

Forwarding Bandwidth	8.8 Gbps
Switching Capacity	13.6 Gbps
Forwarding Rate	6.6 Mpps
Weight	3.6 kg
RAM	16 MB
Flash Memory	8 MB
Operating Humidity	10% to 85% non-condensing
Uplink Ports	2 x 10/100/1000Base-T
Dimensions	4.4 cm x 44.5 cm x 24.2 cm
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Quality of Service (QoS), VLAN support
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.1p
Status Indicators	system
Operating Temperature	0 to 45°C
Ports	24 x 10/100 Ethernet ports
MAC Address Table Size	8, 192 entries
Power Supply	Internal 100-240V AC, 50-60Hz