Address Resolution Protocol is a layer 2 networking protocol used for resolving layer 3 addresses (such as IP addresses) into layer 2 addresses (such as Ethernet MACs). It is used by network devices when communicating with devices on the same layer 2 network.
Questions tagged [arp]
406 questions
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How to send/broadcast ipv6-mac maping cache update request for IPv6 IP
We can update IPv4 neighbors by using arping command. I have used arping -A -I -c with success.
what is the command to update mapping of IPv6 address and mac on router/gateway/nodes. we have observed when…
tushars
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Limit ARP to gateway IP only
My current network setup is as follows
auto lo
iface lo inet loopback
dns-nameservers 8.8.8.8 8.8.4.4
auto eth0
iface eth0 inet static
address 104.244.72.242/32
gateway 107.189.30.113
pointopoint 107.189.30.113
netmask 255.255.255.255
I was…
Harmonytalk
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Linux does not send arp reply
I have an interface keeping receiving arp request but never respond. Can anyone help?
My interface ip is 192.168.40.2.
The routing table looks good.
Joe Lu
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Static ARP Entries aren't being added
So I'm trying to create a static ARP Entry with the ip and MAC Address of my router. I'm currently using admin command prompt and the command arp -s [ip] [mac address], but it isn't working. Every time I check the table with arp -a, I just see the…
Ryan Ding
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Why can't I arping the direct broadcast of the LAN to populate the arp table?
I'm trying to write a simple network discovery for my linux 2.6 router.
I'm testing arping which is bult inot busybox. I can't work out why sending a single request to the direct broadcast is not enough.
root@router:# arping -h
BusyBox v1.32.1…
user3018558
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2 answers
can ping but not arping via OpenVPN
I'm working on a remote machine using OpenVPN at a customer's network. The IP addresses there change dynamically and (until they get hostnames to work properly which is not in my hands at this point) I'm looking for a way to find "my" machine…
Cookie
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3 answers
Windows Incorrect MAC Address Populating ARP Table
Recently I have been running into issues where incorrect MAC Addresses are populating the arp tables of some Windows VMs running in a Cloud Provider's cloud. For example, if I ping 10.1.2.3, some Windows VMs show a different MAC Address from the…
Howard_Roark
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rsync broken pipe between two servers on different networks
I have two FreeBSD servers, both on different networks, with a firewall in between. I have no control over the firewall.
Server 1:
IP: 10.1.0.2
GW (firewall): 10.1.0.1
Server2:
IP: 10.2.0.2
GW (firewall): 10.2.0.1
I am trying…
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How am I receiving ARP brodcasts from a different subnet?
My local IP/subnet is 10.33.19.*/24, and yet I am occasionally receiving broadcasts requesting information from and concerning IPs in the 10.17.*.* range. I was of the impression that ARP requests do not pass through subnets. Am I wrong?
Idunnoanymore
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Why is my client still talking to my server when I change client IP to different subnet?
On occasion, I'm using a Verizon Mifi adapter to share an internet connection over my office network (which doesn't have internet).
To do this, I have to share the internet connection on the adaptor, which changes my local ip address to a different…
silencedogood
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0 answers
How do l manually set an arp table entry to reach an otherwise unreachable host in debian
I'm trying to reach a host on an internal network whose configuration has gotten screwed up, and isn't pulling a DHCP lease as would be expected. I have a host on that network that l'm trying to use as a bridge to the unreachable host so that I…
Elliot
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arping not working in docker
I'm currently trying to add a presence feature in my OpenHab installation by detecting presence of our mobile phones. For iPhone an arping is necessary, unfortunately it looks to me like arping won't work from within the docker container.
Is this…
peez80
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Disable all gratuitious ARP, TCP & HTML queries Windows 7
We have a machine controller running Microchip firmware worked 100% with LINUX computers for 14 years via LAN (eth0).
Now have requirement to run using Windows 7.
Unfortunately Windows sends out a whole heap of gratuitous requests on a regular…
P.Holmes
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Access MAC addresses (IP to MAC - ARP) between two subnets. Seperated via router
I've come across an issue, and after spending days investigating I've realised I need some advice. My networking skill level is still quite low.
I've got two routers, with two LANs. I've connected one of the routers to the other via a LAN <-> WAN…
Josh
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How to plug in modem in switch for virtualized router?
I have been trying to run my router/firewall as a vm in my vmware host for a while now but I hit the following wall: I want to plug in my modem in my switch so as to enable my router to vmotion through my hosts and still work. The idea is as…
Chapeau
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