[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/

[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

[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

[Info] Interface to the Routing System (I2RS)

IETF is trying to build its SDN standard by forming a group called Interface to the Routing System (I2RS) .

They are going to define SDN based on networking vendor side and could effect SDN market sooner or later. 

http://searchsdn.techtarget.com/opinion/IETF-SDN-standards-emerge-Southbound-protocols-NFV-service-chains?src=5174092

The Drafts:

Interface to the Routing System (i2rs) Internet Drafts

[Trema] A good example with Trema to build OpenFlow Controller ( use case )

Previously I just wondered how to use Trema to build a useful and piratical solution with a good architecture for users to leverage its functionality. Well, it does exist. The following URL is a good example of a good use case containing a good architecture.
http://www.slideshare.net/chibayasunobu/developing-production-open-flow-controller-with-trema-201304160

Source Code:
https://github.com/trema/virtual-network-platform


Design:

Implementation:

[Network] EtherTypes Reference

802 EtherTypes Reference:

0x0000 - 0x05DC	IEEE 802.3 length.
0x0600	XEROX NS IDP.
0x0660 0x0661	DLOG.
0x0800	IP, Internet Protocol.
0x0801	X.75 Internet.
0x0802	NBS Internet.
0x0803	ECMA Internet.
0x0804	Chaosnet.
0x0805	X.25 Level 3.
0x0806	ARP, Address Resolution Protocol.
0x0807	XNS compatability.
0x0808	Frame Relay ARP.
0x8035	DRARP, Dynamic RARP. RARP, Reverse Address Resolution Protocol.
0x80F3	AARP, AppleTalk Address Resolution Protocol.
0x8100	EAPS, Ethernet Automatic Protection Switching.
0x8137	IPX, Internet Packet Exchange.
0x814C	SNMP, Simple Network Management Protocol.
0x86DD	IPv6, Internet Protocol version 6.
0x8808	MPCP, Multi-Point Control Protocol.
0x880B	PPP, Point-to-Point Protocol.
0x880C	GSMP, General Switch Management Protocol.
0x8847	MPLS, Multi-Protocol Label Switching (unicast).
0x8848	MPLS, Multi-Protocol Label Switching (multicast).
0x8863	PPPoE, PPP Over Ethernet (Discovery Stage).
0x8864	PPPoE, PPP Over Ethernet (PPP Session Stage).
0x886F	Network Load Balancing.
0x888E	EAPOL, EAP over LAN.
0x88A2	AoE, ATA over Ethernet.
0x88A4	EtherCAT.
0x88CA	TIPC, Transparent Inter Process Communication Protocol.
0x88BB	LWAPP, Light Weight Access Point Protocol.
0x88CC	LLDP, Link Layer Discovery Protocol.
0x88DC	WSMP, WAVE S

[Static Analysis] Tools for static analysis ( C/C++ )

Here are the list of some software tools for static analysis ( C/C++ ). FYI.

• Klocwork Insight ( Commercial )
• Cppcheck
• LintProject Pro
• scan-build