Monday, November 18, 2013

[OpenVNet] The introduction of OpenVNet

Why I pay attention to OpenVNet is because it uses Trema-Edge as OpenFlow 1.3 Controller to communicate with Open vSwitch 1.10. It gives us a great example to use Trema-Edge in Virtual Network Environment and learn more about some use cases. Please check out the following lists:

What is OpenVNet?
http://www.slideshare.net/akirayokokawa/openvnet

Offical Web Site:
http://openvnet.com/

Github Source:
https://github.com/axsh/openvnet

[Quagga] How to compile and install Quagga on Ubuntu 12.04

The following steps are the compilation and installation for Quagga on Ubuntu 12.04. Hopefully it is helpful for you.
  • Install all dependency(package) 
    • sudo apt-get build-dep quagga
  • Give the path for all configurations files and libraries used by quagga for starting. I use this one /opt/quagga .... and this is done by this comand: 
    • ./configure --enable-vtysh --prefix=/opt/quagga --localstatedir=/opt/quagga sysconfdir=/opt/quagga 
  • Create new folder: 
    • sudo mkdir /opt/quagga
  • Add new user : 
    • sudo adduser quagga 
  • Give the priviledge for the user quagga over the folder: /opt/quagga and for the folders and subfolders you give the privilegde for all rights : reading, changing and executing
    • sudo chown quagga:quagga /opt/quagga
    • sudo chmod 777 /opt/quagga 
  • Then you will be able to comiple Quagga: 
    • make
    • sudo make install 
Quagga configuration
--------------------
quagga version          : 0.99.22
host operating system   : linux-gnu
source code location    : .
compiler                : gcc
compiler flags          : -Os -fno-omit-frame-pointer -g -std=gnu99 -Wall -Wsign-compare -Wpointer-arith -Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Wmissing-declarations -Wchar-subscripts -Wcast-qual
make                    : make
includes                : 
linker flags            :  -lcrypt   -lrt -lcap  -lm
state file directory    : /opt/quagga
config file directory   : /opt/quagga
example directory       : /opt/quagga
user to run as  : quagga
group to run as  : quagga
group for vty sockets : 
config file mask        : 0600
log file mask           : 0600

Now, let us try Quagga for some examples
  • Zebra
    • Copy sample to conf file:
      • cd /opt/quagga
      • cp zebra.conf.sample zebra.conf
    • Start zebra daemon, you use this command 
      • sudo /opt/quagga/sbin/zebra &
    • Check the daemon zebra:
      • netstat -a | grep zebra 
    • Get into the zebra, you use 
      • telnet localhost zebra
  • BGP
    • Copy sample to conf file:
      • cd /opt/quagga
      • cp bgpd.conf.sample bgpd.conf
    • Start bgpd: 
      • sudo /opt/quagga/sbin/bgpd &
    • Check the daemon zebra:
      • netstat -a | grep bgpd
    • Get into the bgpd, you use 
      • telnet localhost bgpd
  • vtysh
    • cd /opt/quagga
    • vi /opt/quagga/vtysh.conf
    • sudo /opt/quagga/bin/vtysh
! Sample configuration file for vtysh. ! !service integrated-vtysh-config hostname quagga-router username root nopassword !
Stop Quagga Daemon ( for example: bgpd ):
  • sudo kill `cat /opt/quagga/bgpd.pid`
Port Number:

  • zebra: 2601
  • ripd:  2602
  • ripng: 2603
  • ospfd: 2604
  • bgpd:  2605
  • ospf6d: 2606



Monday, November 11, 2013

[EVB] What is EVB?

The introduction of EVB
http://networkerhere.blogspot.tw/2012/11/impact-of-server-virtualization-on_13.html
http://blog.ipspace.net/2011/05/edge-virtual-bridging-evb-8021qbg-eases.html

Due to overlay network, EVB is becoming to die ...!? The most main reason is that VLAN is not able to scale:
http://blog.ipspace.net/2012/02/edge-virtual-bridging-8021qbg.html

There are also some similar approaches, such as, VN-Tags that can do the same thing as EVB.
http://www.definethecloud.net/access-layer-network-virtualization-vn-tag-and-vepa/

Friday, November 8, 2013

[Puppet] The studying track of Puppet

After taking some time to study Puppet a while, I become to believe more and more that it is a great auto configuration tool. The following URLs are my studying track of Puppet.

For the beginner, it is recommended to walk through for learning the basic concept
Learning Puppet
http://docs.puppetlabs.com/learning/index.html

Once you finish the above document, you probably want to do your own type and provider. Here you go:
Customer Type
http://docs.puppetlabs.com/guides/custom_types.html
Provider Development
http://docs.puppetlabs.com/guides/provider_development.html

Juniper provides its open source project for using Puppet to manage and configure the switches that support Puppet Agent. It is a very good example for you to understand how to define customer type and to implement provider.

To define customer type:
https://github.com/NetdevOps/puppet-netdev-stdlib
To implement provider:
https://github.com/Juniper/puppet-netdev-stdlib-junos

Sunday, November 3, 2013

[OpenFlow 1.X] The Flow Table Usage

When OpenFlow 1.0 guys try to reach the version 1.1 or more, the first question coming up with would most likely be "how to use multi-flow tables ?" Well, we could see an example in RYU OpenFlow Controller as follow: http://www.slideshare.net/yamahata/ryu-sdnframeworkupload
In page 33, there are 3 flow tables which contains match conditons and actions. It can give an initial idea for that question.






P.S: Pica8 works with Broadcom to double flow table size in its OF1.3 Switch
http://searchsdn.techtarget.com/news/2240214709/Pica8-doubles-flow-rule-capacity-in-its-new-OpenFlow-13-switch