Cisco Catalyst 3550 Command Reference Manual page 513

Chapter 2 Cisco IOS Commands
This example shows the Layer 2 path when the source and destination devices are in different VLANs:
Switch# traceroute mac 0000.0201.0601 0000.0301.0201
Error:Source and destination macs are on different vlans.
Layer2 trace aborted.
This example shows the Layer 2 path when the destination MAC address is a multicast address:
Switch# traceroute mac 0000.0201.0601 0100.0201.0201
Invalid destination mac address
This example shows the Layer 2 path when source and destination switches belong to multiple VLANs:
Switch# traceroute mac 0000.0201.0601 0000.0201.0201
Error:Mac found on multiple vlans.
Layer2 trace aborted.
Related Commands Command
traceroute mac ip
78-11195-09
Description
Displays the Layer 2 path taken by the packets from the specified source IP
address or hostname to the specified destination IP address or hostname.
Catalyst 3550 Multilayer Switch Command Reference
traceroute mac
2-487