There are some nightmares that could torment the life of an access network, one of them is the MAC FLAPPING.
as a loop condition or sometimes rogue devices installation, you will spend your day chasing mac addresses around your network.
this great function on switches firmwares can Help!
#Cisco
C3750X_LAB#traceroute mac ip 10.99.0.56 10.98.0.63 detail
Translating IP to mac .....
10.99.0.56 => 0006.5b81.a86e
10.98.0.63 => 0006.5b47.44a3
Source 0006.5b81.a86e found on C3750X_LAB[WS-C3750X-48] (192.168.69.101)
1 C3750X_LAB / WS-C3750X-48 / 192.168.69.101 :
Po25 [auto, auto] => Po28 [auto, auto]
Destination 0006.5b47.44a3 found on C3750X_LAB[WS-C3750X-48] (192.168.69.101)
Layer2 trace completed.
#Huawei
[HW5720EI_LAB]trace mac enable
[HW5720EI_LAB]trace mac 346a-c223-1449 vlan 1
Tracing the route to 346a-c223-1449 over a maximum of 255 hops:
Hops Ingress MAC Ingress Port Ingress Action Relay Action
Egress MAC Egress Port Egress Action
1 346a-c223-1449 XGigabitEthernet0/0/2 IngOK RlyHit
-- -- --
Info: Succeed in tracing the destination address 346a-c223-1449.
#HP
[HP_A7510_LAB]display mac-address (hahahahahha....)On Huawei switches trace mac enable must be enable on all access devices.
enjoy,
.glitchlist crew