Grass Valley K2 Summit Storage Area Network v.7.1 - Manual (Page 56)

56 K2 Storage Area Network Installation and Service Manual 26 October 2009
Chapter 2 Preparing for installation
Understanding system concepts
Make sure you understand the following system concepts before planning or
implementing a K2 SAN.
• “Control network description”
• “Streaming/FTP network description”
• “Media (iSCSI) network description”
• “Networking tips”
• “About hosts files”
• “Host table tips”
Control network description
The control network is for communication between devices and components. It does
not have real-time media traffic or streaming/FTP media traffic. The control network
must be on a different subnet than the streaming/FTP network and the Media (iSCSI)
network. Static IP addresses with name resolution via host files are recommended for
the control network.
The control network applies to both online and nearline K2 SANs.
All the devices of the K2 SAN are on the control network. Stand-alone K2 clients can
also be on the same control network.
Redundant K2 SANs have one control network with hardware separated into an A
side and a B side. There is an A Ethernet switch and a B Ethernet switch. Switches are
connected by InterSwitch Links (ISLs) to provide redundant paths for control network
traffic. On a redundant K2 SAN, devices are on the control network as follows:
• Shared Storage K2 client — The two control GigE ports are configured as a team.
The control team shares a single IP address. One port of the team is on the A side
and the other port of the team is on the B side.
• K2 Media Server — Redundant K2 Media Servers with role of media file system/
metadata server are balanced between the A and B sides. One server is on the A
side and the other server is on the B side. K2 Media Servers with other roles, such
as FTP server, are likewise balanced between A and B sides.
• K2 RAID — When a K2 RAID device has redundant controllers, controller 0 is on
the A side and controller 1 is on the B side.
• Ethernet switch — For control and configuration, the A switch is on the A side and
the B switch is on the B side
Streaming/FTP network description
The streaming/FTP network is for media transfers and FTP traffic. It must be on a
different subnet than the control network and the Media (iSCSI) network. Static IP
addresses with name resolution via host files are recommended for the streaming/FTP
network. Hostnames of network adapters that are dedicated to the streaming/FTP
network must be aliased in the hosts file with the _heo suffix. This directs the
streaming traffic to the correct port.