While upgrading the firmware on several network devices this past weekend, I needed to bring up a tftp server so the clients could retrieve the firmware image. I had a Fedora host readily available, so getting tftp up and working was super easy. Before configuring the server, I ran yum to install the tftp-server package: [...]
I have been doing quite a bit of experimentation with the Linux network stack in the past few weeks. One thing I have always liked about Linux networking is the bonding implementation, which allows you to aggregate one or more interfaces together for high availability purposes. To create a bonded interface on a CentOS Linux [...]
I have come to rely on the CentOS and Fedora network initialization scripts to add default routes, but a situation occurred where I needed to add one manually. The route command syntax differs between Solaris, Linux and OpenBSD, so I thought I would jot down how I manually added a static route to my Linux [...]
I kickstart’ed a Fedora Core 10 host last week, and decided to add a second NIC to the host to do some network bonding testing. Once the I added the NIC and rebooted the host, I noticed that one of the interfaces had the “_rename” extension: eth0_rename Link encap:Ethernet HWaddr 00:0C:29:B7:1B:7B inet addr:192.168.1.148 Bcast:192.168.1.255 Mask:255.255.255.0 [...]
One of my friends pinged me last week and asked me how I would go about locating all hosts on a layer-2 network. Typically I would use fping with the “-g’ option, but he wanted to find all hosts including ones that were running host-based firewalls. For this specific case, I would use the Linux [...]
I built a Fedora Core 10 host this weekend, and configured it to use DHCP to retrieve its IP address and network configuration during installation. Once the host was built, I decided to update the ifcfg-eth0 file to use static IP addresses. Here is the configuration I added to /etc/sysconfig/network-scripts/ifcfg-eth0 to assign the static IP [...]
