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Old 04-26-2015, 03:14 PM   #1
circus78
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ARP request and wrong netmask


Hi all,

imagine two Linux box with:

box1 = 192.168.1.100 netmask 255.255.255.0
box2 = 192.168.1.1 netmask 255.255.255.248 <--- I am aware that this is incorrect!

box1 tries to ping box2, and it send an ARP request to broadcast (ff:ff:ff:ff:ff:ff).
box2 receives ARP request, but it doesn't reply.

Why?
Is ARP capable to filter request from different networks?
Thank you
 
Old 04-26-2015, 04:43 PM   #2
Nemesiz
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box1 range 192.168.1.1-192.168.1.254
box2 range 192.168.1.1-192.168.1.6

No ARP respond for outside network range.
 
Old 04-27-2015, 04:24 PM   #3
jefro
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Arp is not part of ping really.

"Frames are addressed to reach every computer on a given LAN segment if they are addressed to MAC address FF:FF:FF:FF:FF:FF. Ethernet frames that contain IP broadcast packages are usually sent to this address" from wiki.
 
Old 04-29-2015, 05:42 AM   #4
circus78
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Quote:
Originally Posted by jefro View Post
Arp is not part of ping really.

"Frames are addressed to reach every computer on a given LAN segment if they are addressed to MAC address FF:FF:FF:FF:FF:FF. Ethernet frames that contain IP broadcast packages are usually sent to this address" from wiki.
Hi jefro,
so, why is box2 not responding to arp request?
 
Old 04-29-2015, 06:11 PM   #5
Nemesiz
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box2 will replay only to 192.168.1.1-192.168.1.6 range. I`m wrong ?
 
  


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