Interesting announcement from Cisco and VMware during the VMworld 2011 which was regarding the VXLAN capability. Both company had invited a group of product principle together to submit the VXLAN to IETF for approval as a standard for future.

Let’s talk a little bit more about what is VXLAN and why do we need that. As of today, DR solution are commonly deploy by every enterprise environment. Did you realize 1 of the biggest challenge which always happen on the DNS record, hard coded IP segment, subnet and VLAN which always require human interaction to manually change it, to allow a success fail over of the DR scenario? Well, I think this is just 1 of the major issue commonly face. With Cisco Nexus 7000 come with OTV (Overlay Transport Virtualization) which allow you to stretch the Layer 2 traffic over Layer 3, with minimal bandwidth requirement. Cisco had done a great job to the enterprise to address this, which now you can have both side learning the same VLAN, Subnet and ip address. A DNS and ip changes is no longer require as both end are transparent with similar VLAN.

What about Cloud? I always think the major challenges on cloud are Network. VXLAN created are mainly to address to concerns of the public cloud provider. That was mainly due to the limitation on the current VLAN architecture, which only allow 4000++ VLAN to be created in the single manage environment. Imagine you as the public cloud provider, you will easily hit the maximum number and you do not want to build another new infrastructure due to this limit too. According to the Cisco Expert during VMworld, the additional header is been added to the bit and byte to enhance the additional number of VLAN could be deploy in the single environment. At the same time, it deliver the similarity of OTV from private to public cloud, which bring the Hybrid Cloud to the reality of tomorrow.

I will try to find out more technical information about this area with my counterpart back to Malaysia, and share again in details with another post. From the intention of both Cisco and VMware, they are pushing hard for VXLAN on this and I do believe this is 1 of the key area need to be addressed before the hybrid cloud environment could continue scale especially on the public cloud provider perspectives.

You can view the full details of the IETF submission from Cisco and VMware from HERE.