Comments on: Understanding Network Interface Virtualization http://blog.scottlowe.org/2010/03/16/understanding-network-interface-virtualization/ The weblog of an IT pro specializing in virtualization, storage, and servers Wed, 08 Feb 2012 17:13:47 +0000 hourly 1 http://wordpress.org/?v= By: Victor http://blog.scottlowe.org/2010/03/16/understanding-network-interface-virtualization/comment-page-1/#comment-48818 Victor Thu, 15 Jul 2010 20:51:38 +0000 http://blog.scottlowe.org/?p=1862#comment-48818 Scott: Help me understand this. Why is a VNTag necessary? It is said that it is used so that the adjacent bridge can differentiate traffic from different VMs. But each VM has a virtual NIC and a MAC address assigned to it, so why cant the bridge leverage its normal learning process to bind a VMs MAC address with a physical output port? What does the VNTag provide the bridge and how does it use it? Sorry for asking such a basic question. Scott:

Help me understand this. Why is a VNTag necessary? It is said that it is used so that the adjacent bridge can differentiate traffic from different VMs.

But each VM has a virtual NIC and a MAC address assigned to it, so why cant the bridge leverage its normal learning process to bind a VMs MAC address with a physical output port?

What does the VNTag provide the bridge and how does it use it?

Sorry for asking such a basic question.

]]> By: nate http://blog.scottlowe.org/2010/03/16/understanding-network-interface-virtualization/comment-page-1/#comment-47699 nate Tue, 16 Mar 2010 23:19:53 +0000 http://blog.scottlowe.org/?p=1862#comment-47699 STP! ACK! no STP! http://www.techopsguys.com/2009/12/02/extremely-simple-redundancy-protocol/ life is better without STP anywhere on the network STP! ACK! no STP!

http://www.techopsguys.com/2009/12/02/extremely-simple-redundancy-protocol/

life is better without STP anywhere on the network

]]> By: slowe http://blog.scottlowe.org/2010/03/16/understanding-network-interface-virtualization/comment-page-1/#comment-47698 slowe Tue, 16 Mar 2010 19:40:03 +0000 http://blog.scottlowe.org/?p=1862#comment-47698 AFidel, There are a couple of advantages I mentioned in the article. First, overall network bandwidth is improved because there is less need for STP within an NIV architecture. Second, there are generally fewer points of management in an NIV architecture, since the IVs appear as part of the upstream IV-capable bridge. AFidel,

There are a couple of advantages I mentioned in the article. First, overall network bandwidth is improved because there is less need for STP within an NIV architecture. Second, there are generally fewer points of management in an NIV architecture, since the IVs appear as part of the upstream IV-capable bridge.

]]> By: AFidel http://blog.scottlowe.org/2010/03/16/understanding-network-interface-virtualization/comment-page-1/#comment-47697 AFidel Tue, 16 Mar 2010 18:30:29 +0000 http://blog.scottlowe.org/?p=1862#comment-47697 Maybe I'm just slow at picking this up, but what advantage does NIV have over presenting the vswitch as an access layer switch plugging into your distribution layer switches? Switch architectures already have to deal with MAC's moving from port to port thanks to failover technologies long in use and with the tiered model they also have to deal with multiple identities per port due to the fact that the access layer switch aggregates up to the distribution level. Perhaps I'm missing the problem that NIV is trying to solve? Maybe I’m just slow at picking this up, but what advantage does NIV have over presenting the vswitch as an access layer switch plugging into your distribution layer switches? Switch architectures already have to deal with MAC’s moving from port to port thanks to failover technologies long in use and with the tiered model they also have to deal with multiple identities per port due to the fact that the access layer switch aggregates up to the distribution level. Perhaps I’m missing the problem that NIV is trying to solve?

]]> By: uberVU - social comments http://blog.scottlowe.org/2010/03/16/understanding-network-interface-virtualization/comment-page-1/#comment-47695 uberVU - social comments Tue, 16 Mar 2010 16:28:38 +0000 http://blog.scottlowe.org/?p=1862#comment-47695 <strong>Social comments and analytics for this post...</strong> This post was mentioned on Twitter by scott_lowe: What is Network Interface Virtualization (NIV)? More information here: http://tr.im/S4Yq... Social comments and analytics for this post…

This post was mentioned on Twitter by scott_lowe: What is Network Interface Virtualization (NIV)? More information here: http://tr.im/S4Yq...

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