2009.6.12(Fri) Cisco Layer 2 traceroute

這個Layer 2 traceroute的指令,之前有讀過,但一直到今天才初次使用.

此功能可以檢查source mac到destination mac沿路經過switch的哪些介面,都能清楚的顯示出來.

所需具備的條件是swtich cdp要打開, switch也都要支援layer 2 traceroute才能完成此指令的工作.

例如:

cp2960#traceroute mac 0001.e686.8171 0004.acd3.296f
Source 0001.e686.8171 found on cp2960
1 cp2960 (10.141.6.11) : Fa0/10 => Fa0/2
2 FXXX-1-4006 (10.141.200.150) : Fa3/19 => Po1
3 FXXX-2-4006 (10.141.200.213) : Po1 => Fa3/24
Destination 0004.acd3.296f found on FXXX-2-4006
Layer 2 trace completed

或:

cp2960#traceroute mac 0001.e686.8171 0004.acd3.296f detail
Source 0001.e686.8171 found on cp2960[WS-C2960-24TT-L] (10.141.6.11)
1 cp2960 / WS-C2960-24TT-L / 10.141.6.11 :
Fa0/10 [auto, auto] => Fa0/2 [auto, auto]
2 FXXX-1-4006 / WS-C4006 / 10.141.200.150 :
Fa3/19 [auto, auto] => Po1 [auto, auto]
3 FXXX-2-4006 / WS-C4006 / 10.141.200.213 :
Po1 [auto, auto] => Fa3/24 [auto, auto]
Destination 0004.acd3.296f found on FXXX-2-4006[WS-C4006] (10.141.200.213)
Layer 2 trace completed.