About host files
The hosts file is used by the control network and the streaming/FTP network for name resolution,
which determines the IP address of a device on the network when only the device name (hostname)
is given. The hosts file is located at C:\Windows\system32\drivers\etc\hosts on Windows XP
and later operating systems. The hosts file must be the same on all network devices. It includes the
names and addresses of all the devices on the network.
For FTP transfers on a K2 SAN, transfers go to/from K2 Media Servers that have the role of FTP
server. No transfers go directly to/from the shared storage K2 clients that are on the K2 SAN. To
support FTP transfers, in the hosts file the K2 Media Server hostname must have the _he0 extension
added at the end of the name and that hostname must be associated with the K2 Media Server's
FTP/streaming network IP address.
Here is an example of IP addresses and names associated in a hosts file:
192.168.100.11 root_server_1
192.168.101.11 root_server_1_he0
192.168.100.21 root_server_2
192.168.101.21 root_server_2_he0
192.168.100.31 root_server_3
192.168.101.31 root_server_3_he0
192.168.100.41 root_server_4
192.168.101.41 root_server_4_he0
192.168.100.51 root_raid_1
192.168.100.61 root_gige_1
In this example 192.168.100.xx is the control network and 192.168.101.xx is the streaming/FTP
network. Each K2 Media Server has its hostname associated with its control network IP address. In
addition, each K2 Media Server (that has the role of FTP server) has its _he0 hostname associated
with its streaming/FTP network address.
Use SiteConfig to define your networks and devices. When you do so, SiteConfig creates the correct
hosts file and copies the hosts file to each network device. This enforces consistent hosts files across
networks and reduces errors introduced by editing and copying hosts files on individual devices.
You can also view hosts files from SiteConfig for troubleshooting purposes.
Host Table tips
• If transferring to or from a Profile XP or Open SAN system via UIM, the hosts file must also
follow UIM naming conventions for those systems. Refer to the UIM Instruction Manual.
• Do not enable name resolutions for media (iSCSI) network IP addresses in the hosts file, as
hostname resolution is not required for the media network. If desired, you can enter media network
information in the hosts file as commented text as an aid to managing your networks.
02 February 2012 K2 SAN Installation and Service Manual 45
Preparing for installation
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