Correct multicast address?
My WSM server has an IP address = 10.107.8.144 Subnet mask = 255.255.252.0
When I checked the "Enable Multicast" box under the Operating System tab in the WSM console, it prefilled the Multicast address with 18.104.22.168
Is this correct? If not what would the correct address be?
You can either use the preset value or use any valid Multicast IP Address you like: http://en.wikipedia.org/wiki/Multicast_address.
The upcoming WSM Advanced Administration Guide will cover multicast in detail.Here's an excerpt:
In Internet Protocol version 4 (IPv4), the Class D addresses, 22.214.171.124 to126.96.36.199, are used for multicasting. It is recommended that you use the multicastIP address range 188.8.131.52 to 184.108.40.206 for WSM multicast streaming. TheInternet Assigned Numbers Authority (IANA) has reserved this address range asAdministratively Scoped addresses for use in private multicast domains. Networkadministrators are free to use multicast IP addresses in this range inside of their domainwithout fear of conflicting with others elsewhere in the Internet, so long as such multicasttraffic will not be passed to the Internet cloud. In fact, it has become a common practice toblock multicast traffic in these ranges from entering or leaving an Autonomous Domain.The Administratively Scoped addresses can be reused in different regions of the network.Network administrators should configure their multicast routers to insure that multicasttraffic in the Administratively Scoped address range does not cross into or out of theirmulticast domain.
It is also recommend that you assign a distinct multicast IP address for different virtualdisk images to avoid possible multicast address collisions. For example:Vdisk1 - 220.127.116.11Vdisk2 - 18.104.22.168Vdisk3 - 22.214.171.124
This practice ensures that all WSM multicast sessions can be run in parallel withoutinterfering with each other, regardless of how your WSM environment is set up (see "WSMMulticast Q&A" for scenarios where problems can occur if distinct multicast addresses arenot used).
For virtual disk version 3.0 or later, if the 3rd and/or 4th multicast IP address octet isconfigured as 255, the WSM multicast server and client will automatically replace it withcorresponding octet(s) of the WSM streaming server IP from which the virtual disk imageis streamed.For example:•If VDisk’s multicast IP is configured as 126.96.36.199:·When this image is streamed from WSM streaming server 192.168.1.99, the multicast address will be 188.8.131.52.·When this image is streamed from WSM streaming server 192.168.2.98, the multicast address will be 184.108.40.206.•If VDisk’s multicast IP is configured as 220.127.116.11:·When this image is streamed from WSM streaming server 192.168.1.99, the multicast address will be 18.104.22.168.·When this image is streamed from WSM streaming server 192.168.2.98, the multicast address will be 22.214.171.124.•If VDisk’s multicast IP is configured as 126.96.36.199:·When this image is streamed from WSM streaming server 192.168.1.99, the multicast address will be 188.8.131.52.·When this image is streamed from WSM streaming server 192.168.2.98, the multicast address will be 184.108.40.206.
This process allows a single image to be multicast from different servers over differentmulticast sessions.