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Posts in Networking
Using sharemgr to manage NFS file systems on OpenSolaris hosts
I've supported Solaris NFS servers for as long as I can remember. The typical drill I follow to get a server up and running is: 1. Work with a developer / app support to determine how much space is needed. 2…
$ read more →Debugging problems with the open-iscsi initiator
I talked about the open-iscsi initiator in a previous post, and briefly touched on debugging problems. If you want to get additional debugging data for the iscsid daemon, you can add the "-d 8" option to the iscsi initialization file: This will cause the daemon to write a bunch of debugging data to the syslog logs, which you can then use to isolate problems.
$ read more →Configuring the open-iscsi initiator on CentOS Linux hosts
My lab environment at home consists of numerous hosts running Linux, Solaris, HP-UX and Windows. To allow me to rebuild hosts with little impact to the applications they run, I typically assign one or more iSCSI LUNs to each host. Configuring the Solaris iSCSI initiator is pretty straight forward, and I documented it a while back for SysAdmin magazine. The Linux Open iSCSI initiator is just as easy to configure, and I thought I would document the process here for future reference…
$ read more →Configuring active/backup bonded interfaces on CentOS Linux hosts
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 host, you will first need to locate two or more NICs to use. Once you locate a couple of NICs, you will need to create an ifcfg-eth[0-9] interface file similar to the following for each interface: The difference between these files and the typical interface definition files is the removal of the network information, and the inclusion of the MASTER and SLAVE directives…
$ read more →Manually adding a default route to a CentOS Linux host
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 host for future reference:
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