Solved

arp who-has on multiple subnet

Posted on 2010-11-26
2
739 Views
Last Modified: 2012-05-10

Hi,

I have some questions about the protocol ARP. One of my device send a "who has" arp packet to a other device. But the second device are in other subnet.

If I understand well a "who has" query is a broadcast, so it is normal that the second device don't reply the "who has" query since is not in the same subnet. is it? But why the first device send "who has" query?

Maybe I just don't understand how is working.

Here are the packet:

2.835165 wlan in arp who-has 192.168.10.40 tell 192.168.6.2
0x0000       ffff ffff ffff 0002 2d66 1bd2 0806 0001      ........-f......
0x0010       0800 0604 0001 0002 2d66 1bd2 c0a8 0602      ........-f......
0x0020       0000 0000 0000 c0a8 0a28                                          .........(

and no more reply after that.



0
Comment
Question by:Vbourbeau
2 Comments
 
LVL 3

Accepted Solution

by:
guitar7man earned 250 total points
ID: 34218594
If a node needs to get to a device on a different subnet, it's not going to send out an ARP for its MAC address, it's going to ARP for its gateway (if needed) because it knows the intended destination is not on the layer 2 network. Do you have your subnet mask correct on the host?
0
 

Author Comment

by:Vbourbeau
ID: 34218781

This is what I think. For the subnet mask I'm pretty sure is set correctly but I can't check for now.

My doubts are on the device himself maybe an frimware update will help.

Thank you
0

Featured Post

Manage your data center from practically anywhere

The KN8164V features HD resolution of 1920 x 1200, FIPS 140-2 with level 1 security standards and virtual media transmissions at twice the speed. Built for reliability, the KN series provides local console and remote over IP access, ensuring 24/7 availability to all servers.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
eBGP policy and ACL in interface 7 60
Network Packet Analyzer Solar Winds 3 94
EIGRP Load sharing 12 82
Expanding Subnet Mask 20 156
The article explains the protocols and technology which is involved when two computers on different TCP/IP networks communicate with each other. In the diagram, a router is used to segregate two networks. The networks are 192.168.1.0/24 and 192…
As companies replace their old PBX phone systems with Unified IP Communications, many are finding out that legacy applications such as fax do not work well with VoIP. Fortunately, Cloud Faxing provides a cost-effective alternative that works over an…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question