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Linux - Networking This forum is for any issue related to networks or networking.
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Old 10-04-2012, 01:32 PM   #1
Jamf
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using static IP addressing for VM guest machines


if been working on this a bit and have referenced http://wiki.centos.org/HowTos/KVM and http://www.linux-kvm.org/page/Networking

While I have been able to establish network connectivity to my guest VMs they are not accepting static addressing. What is most odd about this is that when I dhclient the interface and it grabs an adress it works, but I can ifconfig it to that exact same address/mask/gateway etc.. and it won't work. Any thoughts on why this is? does it have to do with the briding?
 
Old 10-05-2012, 04:19 PM   #2
jefro
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Virtual machines have a virtual router for use when you want to use the Nat way to connect. Guess it could know that it assigned a number already to a mac and for some reason locks it out on release. I think I used a higher number than the normal pool of addresses to work. Say 10.10.0.50 instead of letting it get 10.10.0.16 or whatever it was.
 
Old 10-06-2012, 02:30 AM   #3
Jamf
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That shouldn't matter though. I have been having all kinds of issues now though following instructions i find here and there on the internet. If the gateway is correct and the nameserver is correction as long as the IP falls within the subnet (even if it is outside the DHCP pool) and is using the correct mask, that address is routable, or I am wasting my time studying for a CCNP becuase I can't grasp basic networking. I mean how can the same address assigned with ifconfig NOT work and the exact same address that was recieved by DHCP does work. DHCP does edit resolv.conf which COULD be an issue since I am pinging internet hostnames to test connectivity but even when i verify that is correct it still doesnt work. My best guess is like.... the wireless routers arp table? but I don't even care anymore, I think I will try and use esxi since I can't verify that configuring VMs with QEMU is part of the RHCSA exam.
 
  


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