10-24-2012
Quote:
Often you can ping the broadcast address and the duplicate IP addresses will show up in the reply.
There's absolutely nothing on my network that answers a ping broadcast -- perhaps because of the wireless bridge -- and increasingly many things these days never bother answering ping at all.
Engineers seem to be forgetting why ICMP exists. I don't like it, but if the equipment isn't my own, I have to live with it.
Equipment can't block or ignore ARP and still function on a local network though, so I've got the
arping tool installed standard everywhere. That's how I tracked down the dup.
arping2 -d -i lan 192.168.6.101 Note that without the -d, it won't show dups.
Last edited by Corona688; 10-24-2012 at 12:38 PM..
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IWSPY(8) Linux Programmer's Manual IWSPY(8)
NAME
iwspy - Get wireless statistics from specific nodes
SYNOPSIS
iwspy interface
iwspy interface [+] DNSNAME | IPADDR | HWADDR [...]
iwspy interface off
DESCRIPTION
Iwspy is used to set a list of addresses in a wireless network interface and to read back quality of link information for each of those.
This information is the same as the one available in /proc/net/wireless : quality of the link, signal strength and noise level.
This information is updated each time a new packet is received, so each address of the list add some overhead in the driver.
Note the this functionality work only for node part of the current wireless cells.
PARAMETERS
You may set any number of addresses up to 8.
DNSNAME | IPADDR
Set an IP address, or in some cases a DNS name (using the name resolver). As the hardware work with hardware addresses, iwspy will
translate this IP address through ARP. In some case, this address might not be in the ARP cache and iwspy will fail. In those case,
ping(8) this name/address and retry.
HWADDR Set a hardware (MAC) address (this address is not translated & checked like the IP one). The address must contain a colon (:) to be
recognised as a hardware address.
+ Add the new set of addresses at the end of the current list instead of replacing it. The address list is unique for each device, so
each user should use this option to avoid conflicts.
off Remove the current list of addresses and disable the spy functionality
FILES
/proc/net/wireless
SEE ALSO
iwconfig(8), ifconfig(8), iwlist(8). iwpriv(8).
net-tools 31 October 1996 IWSPY(8)