Hi,
This is my first time to post on this mailing list but i have been watching
it for quite some time now.
In regards to this issue i know you have verified that this with a physical
box successfully. Is your there a router between your two servers by
chance? However this seems like some kind of firewall issue.
In your environment is it possible for you to backup your firewall rules,
clear your firewall to temporarily allow all access and try again?
Are your VMs using a different interface to connect to the cobbler server?
It might be best to check your firewall rules for filtering of DHCP option
93 on the port accepting DHCP requests from the Cobbler server.
Also make sure you didnt open those ports for just you VMs but for the
entire subnet.
Eitherway I hope this helps.
Respectfully,
Scott
2015年4月2日木曜日、Alan Evangelista<alanoe(a)linux.vnet.ibm.xn--com>-i63fpcva2g3ioh5ky375e:
On 04/01/2015 10:52 PM, Sethuraman, Murali wrote:
> Hi Alan,
> Thanks for your continued responses. When "dhclient" is executed without
> any options from the baremetal, /var/log/messages on the cobbler server
> does not get updated with any DHCP requests [similar to what happens when
> it tries to pxe boot]. It does not work.
>
I know I have already asked again, but just confirming
- Are you sure the DHCP server is in the same subnet of the client?
- Are you sure there are no other DHCP servers in the same subnet?
If both answers are "yes", there is something odd in your network/DHCP
setup which prevents
broadcasted DHCP requests to arrive in the DHCP server. I'd also check if
there are any link layer firewalls
which may be blocking the communication. If not, I'd use some network
debugging tool such
as tcpdump in another system of the same subnet and assert if it is
receiving the broadcasted DHCP
requests (UDP packages), then we know if the problem is specific to the
DHCP server or not.
Regards,
Alan Evangelista
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