10-13-2008 11:30 PM - edited 03-03-2019 11:55 PM
is there any way to find the IP address from the mac-address when the mac-address is 4 or 5 hops away from my router.
10-13-2008 11:33 PM
If you mean find the IP address from the mac-address by interrogating your router then the answer is no.
Mac-addresses are only local to the LAN so if the device is 4 or 5 hops away it the packet on your router will only have the mac-address of the last hop.
Jon
10-14-2008 12:02 AM
HOST 1----R1--R2--R3-----R4-----R5---HOST 2
please clarify , if i have a mac-address of HOST 2 , then which Router will be the last hop for HOST 1 ...... and the command for that ???
10-14-2008 12:55 AM
For your scenario above, you can know the IP address of Host2 from the MAC by issuing the "R5# show arp" command on router 5 only, as this router is the default gateway for Host2.
Cheers mate.
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