Quagga Software Routing Suite

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Quagga Software Routing Suite.

Quagga is a routing software suite, providing implementations of OSPFv2, OSPFv3, RIP v1 and v2, RIPng and BGP-4 for Unix platforms, particularly FreeBSD, Linux, Solaris and NetBSD. Quagga is a fork of GNU Zebra which was developed by Kunihiro Ishiguro. The Quagga tree aims to build a more involved community around Quagga than the current centralised model of GNU Zebra.

I’m not sure I want to support this.  This is what Cisco et al. do and they do this very well.  As a science project maybe but why would a small or medium biz need to do OSPF or RIP?  I need to think about that question for awhile.

How Can I Justify Using Red Hat When CentOS Exists? – Slashdot

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How Can I Justify Using Red Hat When CentOS Exists? – Slashdot.

by Paska (801395) Alter Relationship on Sunday October 30, @05:20PM (#37888510) Homepage

CentOS’s release schedule has been really struggling recently. Release 6 was almost edging a 250 day delay over Red Hat.

CentOS have still to announce an official date for 6.1 to be released, which Red Hat released back on May 19th. There is a lot of uncertainty regarding CentOS releases and as such in my opinion makes CentOS not the ideal choice for the enterprise.

Other advantages are Red Hat’s support services and the Red Hat Network (RHN) are second to none. RHN alone is what convinced us to pony up money for licenses.

The gist of the advantages are: better support, quicker updates/security fixes, easier and centralised management of multiple servers with the only disadvantage being a price tag.

Interesting discussion about this over on Slashdot.

Computer cluster

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Computer cluster – Wikipedia, the free encyclopedia.

A computer cluster is a group of linked computers, working together closely thus in many respects forming a single computer. The components of a cluster are commonly, but not always, connected to each other through fast local area networks. Clusters are usually deployed to improve performance and availability over that of a single computer, while typically being much more cost-effective than single computers of comparable speed or availability.[1]

And now I will put together clusters for high availability and load balancing.  This is where VMs come in handy.   I think I  prefer loosely coupled clusters, clusters where individual nodes are separated on different power grids.

It’s always nice to have a succinct definition handy to stay focused.

Xen Guest (DomU) Installation

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xm commands

List Domains (Xen Guests)

# xm list

Start a Guest

# xm create [guest-config]

Connect to a guest console ( Back: ESC-] (US-keyboard), Ctrl-5 (German keyboard))

# xm console [guest_name]

Shutdown a guest

# xm shutdown [guest_name]

Destroy (Power off) a guest

# xm destroy [guest_name]

Monitor guests

# xm top

virsh commands

# virsh

virsh # help

 

virsh start [guest_name]

via Xen Guest (DomU) Installation « Thomas Vogt’s IT Blog.

OpenWrt

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OpenWrt is described as a Linux distribution for embedded devices.

Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developer, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.

via OpenWrt.