Aidan Finn, IT Pro

Jose Barreto tweeted earlier today about a new support article for SMB 3.0 Multichannel on Windows Server 2012 (WS2012).  The scenario is that SMB Multichannel skips non-routable IP addresses of a network interface if routable IP addresses are also configured.

On a Windows Server 2012-based computer or a Windows 8-based computer that connects to a server message block (SMB) 3.0 file share, SMB Multichannel ignores non-routable IP addresses if the network interface has both routable and non-routable IP addresses configured. This behavior occurs even though SMB Multichannel typically tries to connect with additional interfaces if multiple network interfaces exist, and tries to establish multiple TCP/IP connections for a Receive-Side Scaling (RSS) capable network interface.

This is a complicated one and takes a couple of reads.  There is no hotfix.  It’s a configuration issue.

Copyright Warning

This blog post is the property of Aidan Finn (@joe_elway / http://www.aidanfinn.com) and may not be reused in any manner without prior consent of Aidan Finn. You may quote one paragraph from this blog post if you link to the original blog post.

Related posts:

1. Very Important Note on Multichannel & Failover Clusters
2. Windows Server 2012 NIC Teaming and Multichannel
3. Enabling SMB Multichannel On Scale-Out File Server Cluster Nodes
4. KB2804678–Cannot Exceed 256 Dynamic MAC Addresses By Default On Hyper-V Host
5. Windows Server 2012 NIC Teaming Part 2 – What’s What?