Cisco Catalyst 3650 series Command Reference Manual page 1000

traceroute mac
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.
The Layer 2 traceroute feature is not supported when multiple devices are attached to one port through hubs
(for example, multiple CDP neighbors are detected on a port).
When more than one CDP neighbor is detected on a port, the Layer 2 path is not identified, and an error
message appears.
This feature is not supported in Token Ring VLANs.
Examples This example shows how to display the Layer 2 path by specifying the source and destination MAC addresses:
Device# traceroute mac 0000.0201.0601 0000.0201.0201
Source 0000.0201.0601 found on con6[WS-C3750E-24PD] (2.2.6.6)
con6 (2.2.6.6) :Gi0/0/1 => Gi0/0/3
con5
con1
con2
Destination 0000.0201.0201 found on con2[WS-C3550-24] (2.2.2.2)
Layer 2 trace completed
This example shows how to display the Layer 2 path by using the detail keyword:
Device# traceroute mac 0000.0201.0601 0000.0201.0201 detail
Source 0000.0201.0601 found on con6[WS-C3750E-24PD] (2.2.6.6)
con6 / WS-C3750E-24PD / 2.2.6.6 :
con5 / WS-C2950G-24-EI / 2.2.5.5 :
con1 / WS-C3550-12G / 2.2.1.1 :
con2 / WS-C3550-24 / 2.2.2.2 :
Destination 0000.0201.0201 found on con2[WS-C3550-24] (2.2.2.2)
Layer 2 trace completed.
This example shows how to display the Layer 2 path by specifying the interfaces on the source and destination
devicees:
Device# traceroute mac interface fastethernet0/1 0000.0201.0601 interface fastethernet0/3
0000.0201.0201
Source 0000.0201.0601 found on con6[WS-C3750E-24PD] (2.2.6.6)
con6 (2.2.6.6) :Gi0/0/1 => Gi0/0/3
con5
con1
con2
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 device is not connected to the source device:
Device# traceroute mac 0000.0201.0501 0000.0201.0201 detail
Source not directly connected, tracing source .....
Source 0000.0201.0501 found on con5[WS-C3750E-24TD] (2.2.5.5)
con5 / WS-C3750E-24TD / 2.2.5.5 :
con1 / WS-C3550-12G / 2.2.1.1 :
con2 / WS-C3550-24 / 2.2.2.2 :
Command Reference, Cisco IOS XE Everest 16.5.1a (Catalyst 3650 Switches)
974
(2.2.5.5
(2.2.1.1
(2.2.2.2
Gi0/0/2 [auto, auto] => Gi0/0/3 [auto, auto]
Fa0/3 [auto, auto] => Gi0/1 [auto, auto]
Gi0/1 [auto, auto] => Gi0/2 [auto, auto]
Gi0/2 [auto, auto] => Fa0/1 [auto, auto]
(2.2.5.5
(2.2.1.1
(2.2.2.2
Gi0/0/1 [auto, auto] => Gi0/0/3 [auto, auto]
Gi0/1 [auto, auto] => Gi0/2 [auto, auto]
) : Gi0/0/3 => Gi0/0/1
) : Gi0/0/1 => Gi0/0/2
) : Gi0/0/2 => Gi0/0/1
) : Gi0/0/3 => Gi0/0/1
) : Gi0/0/1 => Gi0/0/2
) : Gi0/0/2 => Gi0/0/1