Running Layer 2 Traceroute - Cisco Catalyst 4500 Series Configuration Manual

Using Layer 2 Traceroute
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Running Layer 2 Traceroute

To display the physical path that a packet takes from a source device to a destination device, enter either
one of these commands:
Command
Switch# traceroute mac {source-mac-address}
{destination-mac-address}
or
Command
Switch# traceroute mac ip {source-mac-address}
{destination-mac-address}
These examples show how to use the traceroute mac and traceroute mac ip commands to display the
physical path a packet takes through the network to reach its destination:
Switch# traceroute mac 0000.0201.0601 0000.0201.0201
Source 0000.0201.0601 found on con6[WS-C2950G-24-EI] (2.2.6.6)
con6 (2.2.6.6) :Fa0/1 => Fa0/3
con5
con1
con2
Destination 0000.0201.0201 found on con2[WS-C3550-24] (2.2.2.2)
Layer 2 trace completed
Switch#
Switch# traceroute mac ip 2.2.66.66 2.2.22.22 detail
Translating IP to mac .....
2.2.66.66 => 0000.0201.0601
2.2.22.22 => 0000.0201.0201
Source 0000.0201.0601 found on con6[WS-C2950G-24-EI] (2.2.6.6)
con6 / WS-C2950G-24-EI / 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.
Switch#
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
8-12
This feature is not supported in Token Ring VLANs.
(2.2.5.5
(2.2.1.1
(2.2.2.2
Fa0/1 [auto, auto] => Fa0/3 [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]
Chapter 8
Purpose
Runs Layer 2 traceroute to trace the path that
packets take through the network.
Purpose
Runs IP traceroute to trace the path that
packets take through the network.
) : Fa0/3 => Gi0/1
) : Gi0/1 => Gi0/2
) : Gi0/2 => Fa0/1
Checking Port Status and Connectivity
OL-25340-01