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Old 11-05-2004, 09:03 AM   #1
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Registered: Jul 2004
Location: U.S
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ARP request

I am working on a router projects. My PC (two ethernet interface) run with RedHat linux. eth0 connect to a "managed switch. The switch three ports has been programmed (port 2 -- vlan 2, port 3 --vlan 3, port 7 -- vlan 2 & 3)
I also added vlan 2 & 3 to eth0. Therefore, I ran /sbin/ifconfig I can found etho, eth0.2 & eth0.3.

Connect two test PC to switch and enable DHCP. I can get IP address of two PCs. ( which connect to port2 vlan2, which connect to port 3 vlan3)

ping from to The Linux PC receive ARP request (I am and who is I ran /sbin/arp did not found arp entry


1. How can I enable ARP features on my Linux pc?
2. How I add MAC to ARP table?
3. Why DHCP request works fine without any arp request?


Old 11-05-2004, 09:21 AM   #2
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Registered: Aug 2003
Location: Sydney, Australia
Distribution: Gentoo
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The Linux PC ignores the request because the arp request is not for itself.

2. Use the arp command

3. The clients don't know the ip address of the dhcp server to begin with.
Old 11-05-2004, 10:01 AM   #3
Registered: Sep 2004
Location: Texas, USA
Distribution: Fedora
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ping from to The Linux PC receive ARP request (I am and who is I ran /sbin/arp did not found arp entry

Maybe I'm misunderstanding your post or how your computers are actually connected to yuor switch, but I don't see a problem here. VLAN's separate broadcast domains. So why would you think an arp request would be sent from VLAN2->VLAN3???


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