ARP (Address Resolution Protocol) is a protocol used to find an address from the link layer (Ethernet, for example) from the network layer address (such as an IP address).

learn more… | top users | synonyms

1
vote
1answer
1k views

wake on lan from internet - problems with router: arp

I've ubuntu server on lan with static IP within lan, I use router: DSL-2640B. For waking I use program called "wolcmd". From within lan network it is very easy to wake up the machine. I just issue ...
0
votes
1answer
2k views

How can I add an active arp entry on Win 7

I can't see to find a way to add an active/dynamic arp entry. This all started with old Win32 exe that calls the SetIpNetEntry API to create a dynamic/active arp entry as part of a process to setup ...
0
votes
1answer
761 views

why do I get a different MAC address using arp and ifconfig?

# ifconfig eth1 Link encap:Ethernet HWaddr 00:1e:8c:10:xx:xx # arp Address HWtype HWaddress Flags Mask Iface 192.xxx.x.x ether ...
2
votes
2answers
3k views

target IP address is same as source IP address in ping ARP request

I am working on wireless driver. But I feel this question is just a general network question. I saw strange content of the first ping packt, which is an arp request, where the target IP address is ...
3
votes
1answer
316 views

Why would an iPod Touch and PS3 respond to netdiscover as 0.0.0.0?

Only slightly related to this question, because it was discovered in the same scan: Can someone explain how this happened? When running netdiscover on my home network, my iPod Touch (identified by ...
5
votes
1answer
414 views

Can someone explain how this happened?

I seem to be having some odd results when running netdiscover on my home network. From the cable modem to my scanner (skipping a few peripherals), here's the basic layout: The cable modem is ...
2
votes
1answer
1k views

Can I temporarily affect ARP table without using `arp` command directly?

I have some knowledge about arp command under linux which can help modify the ARP table. Now I want to temporarily affect ARP table(add, delete and change) entries without the help of arp. For ...
3
votes
1answer
2k views

How do i get the ARP list from our router (programmatically / in the command line)?

At our office we have a netgear router, I'd like to poll it to see who's in the office (preferably on the command line) because i'm weird like that.. Is their a standard way of doing this? is it ...
3
votes
1answer
826 views

Detect changes to routing table or address resolution protocol on Windows 7

On two different Win7 PCs we're having a very specific problem where connecting a device which uses a RNDIS driver sometimes disrupts the PC's network adapter connection (we detect this because we ...
0
votes
1answer
2k views

What happens when an ARP Request arrives to an Ethernet switch?

I remember reading somewhere that switches defined "data link layer broadcast domains": that is, data link broadcasts from one network connected to the switch are not forwarded to the others. If this ...
15
votes
5answers
51k views

how does 'ping' command really work?

How does the ping command really work? Specifically where does the ARP (Address Resolution Protocol) come into picture? I was asked this question in an interview and I was not able to come up with ...
3
votes
3answers
757 views

Wireless router's ip address

Does my wireless router have an ip address that's independent of my computer's ip address? Is there any way to determine what that ip address is? Note: I'm not talking about the internal router ip ...
4
votes
3answers
2k views

What adds these Multicast IPs to the ARP table, as static entries?

(Similar to my previous question, but addressing a separate aspect which has gone unanswered.) I've seen this on my Windows 7 computer, and searches have turned up others in Vista/7 who have seen the ...
5
votes
2answers
2k views

What are the purposes of the addresses in this ARP table?

I've seen this on my Windows 7 computer, and searches have turned up others in Vista/7 who have seen the same. However, I've not yet found (or perhaps have just missed) a good explanation for this. ...
4
votes
3answers
3k views

Given a PC's MAC address, can I find its IP?

Is there a way to get the IP address when all you have is the MAC of an item?
2
votes
3answers
2k views

Windows XP Home issuing about 20 ARP requests a second

I have been asked to remotely fix a family member's computer that is running "slow". I've had them run any number of S&D and AVG scans, even in safe mode, but they find nothing of interest. In ...
16
votes
3answers
76k views

Windows 7: The ARP entry addition failed: Access is denied

I'm on Windows 7 and am trying to assign a static arp entry for my default gateway using the command: arp -s 172.24.7.254 00-05-01-f9-28-00 172.24.1.20 But I get the following error: The ARP ...