Fork me on GitHub

Short Update

Just a short update… I know I haven’t posted anything in quite a while, but I hope to get back into the habit of doing so… or even making daily posts like I had wanted.

  1. The truck that was totaled has been replaced with a newer, nicer one.
  2. I ...
more ...

Xen/Etherboot and DHCP Problems

Well, I’ve spend the better part of the last week or so debugging a problem with out new Xen VMs (on one host) not getting DHCP leases. Since our DHCP servers (ISC DHCPd 3.0.6) are using Brian Masney’s LDAP patch (which has recently been included in ...

more ...

DHCP Debugging and Handy TCPdump filters

Recently at $WORK we’ve been having some strange issues with a particular Xen VM not getting DHCP. Traditional (tail -f dhcpd.log) debugging hasn’t turned up much, other than the server is getting the DISCOVER but not sending out an OFFER. I’ve turned to packet captures to ...

more ...


Using nmap to quickly ping all hosts in an address range

At $WORK, the subnet we use for some of our workstations and test boxes was only recently setup with DHCP. Previously, we’d used IP-by-Whiteboard in the office. As a result, most of the recent machines use DHCP, but there are a few older ones still around using static ...

more ...