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Cisco ME 3400 Ethernet Access Switch Command Reference
OL-9640-10
Chapter 2    Cisco ME 3400 Ethernet Access Switch Cisco IOS Commands
traceroute mac
This example shows the Layer 2 path when the switch is not connected to the source switch:
Switch# traceroute mac 0000.0201.0501 0000.0201.0201 detail
Source not directly connected, tracing source .....
Source 0000.0201.0501 found on con5[ME-3400-24TS] (2.2.5.5)
con5 / ME-3400-24TS/ 2.2.5.5 :
        Gi0/1 [auto, auto] => Gi0/3 [auto, auto]
con1 / WS-C3550-12G / 2.2.1.1 :
        Gi0/1 [auto, auto] => Gi0/2 [auto, auto]
con2 / WS-C3550-24 / 2.2.2.2 :
        Gi0/2 [auto, auto] => Fa0/1 [auto, auto]
Destination 0000.0201.0201 found on con2[WS-C3550-24] (2.2.2.2)
Layer 2 trace completed.
This example shows the Layer 2 path when the switch cannot find the destination port for the source 
MAC address:
Switch# traceroute mac 0000.0011.1111 0000.0201.0201
Error:Source Mac address not found. 
Layer2 trace aborted.
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 Description
traceroute mac ip 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.